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Evaluating the impact of chemical waste: How safety and the bottom line can both benefit

This paper demonstrates that it is possible to reduce chemical costs by identifying and limiting the wastes found in dispensing, storage and application. Reducing these hidden costs will also improve productivity and health and safety in the workplace.

Improving efficiency in electric motors

This article discusses the rules, guidelines and the best practices to reduce losses in induction electric motors.

Feeding the grid from river water

The German Federal Government supports the use of regenerative energy. Two prototype river turbines were installed in the river Rhine, near the German town of St Goar. The turbines successfully provided the town with electric power from river water, prompting the company who designed them to put them into commercial operation.

Reducing avoidable pressure losses

Industrial plants frequently employ oversized pumps out of caution. Pressure losses, and consequently energy consumption, may thus be unnecessarily high. Dr Walter Schicketanz explains in detail how such avoidable pressure drops can be determined both theoretically and in the field, as well as examining how to reduce them.

Waste & Hazard Walk Workbook

The Waste & Hazard Walk is a systematic facility tour which looks for ways to improve productivity and safety, with a specific focus on industrial supplies and personal protective equipment (PPE). This free download outlines how your company could benefit from a Waste & Hazard Walk.

Packaged systems for water demands

Packaged pumping systems offer ease of installation, single source responsibility and a streamlined manufacturing process. This article discusses the best way to use them to satisfy the demands of municipal distribution systems, industrial process systems, non potable and water reuse systems and domestic water booster systems.

Refinery specs: the user’s view

Users of centrifugal pumps for refineries often tailor their specifications with additions to the well-known API 610 standard. However, D. Chaware and A. Joshi have found that some additions can prove deleterious. They discuss the shortcomings of some of the most frequently used addenda and offer resolutions.

Energy savings with new air operated diaphragm technology

A look at LEAP technology, (Low Energy Air Pumps), which controls air flow through air operated diaphragm pumps with a fundamentally different principle. Pump manufacturer Tapflo claims that this technology shows efficiency improvements at all air pressures.

Selection of gas compressors: part 5

In this article, Eduardo Larralde and Rafael Ocampo continue their in-depth survey of gas compressors. Here, the procedures and directions for the selection of compressors in general are presented, followed by detailed examination of the factors to be considered in the selection of reciprocating compressors.

How to compete with the Chinese pump market

China’s plan to move 250 million rural residents into new urban areas over the next few years means that pumps used in the power generation and water & wastewater treatment sectors will be in high demand. But, asks Preston Reine, what might slow the rise and rise of the Chinese pump market?

Using LEAN techniques to cut VOC emissions

How could your company change its approach to cutting VOC hazards on the shop floor?

Distance no problem for oil transportation

Around the world, more than 460 000 km of pipelines is used to move crude oil from wells to ports and then refineries. Transporting crude oil over significant distances requires highly reliable, energy efficient pumps designed to meet challenging operating conditions. Here, we see how Sulzer Pumps optimizes pipeline pumps to meet continuously changing requirements and to ensure safe operation.

Cost cutting with pump performance prediction

Prediction of prototype performance is often a critical requirement for success. New designs have required expensive and time consuming hardware testing. However, virtual testing with CFD has the potential to reduce or even replace hardware testing, but only if it can predict performance with sufficient accuracy, ease-of-use, and speed. This article considers three case studies where CFD testing has been proved effective. Signup required (sign up by clicking on the black "register" button - below, right).

7 Principles of Lean Supplies

How could your company change its approach and become a more efficient workplace?

Case study: Two-shaft Turbine Feed Pumps For Nuclear Power Station and Thermal Power Station

The disaster at the Fukushima-1 Nuclear Power Plant raised questions about the safety of nuclear energy technologies. However, improving safety measures for modern nuclear technologies is possible. One of the latest trends, highlighted in this case study, is the use of feed electric pumps (FEP) in the systems of the recreated Nuclear Power Stations.

Distributor adapts to changing market

AxFlow’s growth over the past 25 years can be largely attributed to its willingness to introduce new concepts and strategies that address the changing face of the pump industry, and also through acquiring appropriate businesses. Representing several of the world’s leading pump manufacturers, AxFlow is looking to expand its horizons.

Answering global de-watering needs

Pioneer Pump is a privately-owned company located in the UK, US and South Africa. It specialises in the design and manufacture of high-quality end suction centrifugal pumps, mainly for the mining, construction, municipal and industrial markets. World Pumps asked MD Simon Ruffles about the sectors addressed and their needs.

Metal to composites for improving reliability

Conversion of metal pump wear parts to advanced composite materials can lead to substantial annual cost savings through increased seal and bearing life, less risk of pump seizures, increased MTBR (Mean Time Between Repair), and reduced energy use. This is demonstrated by major industrial companies that transitioned from metals to DuPont Vespel CR-6100 wear parts for some of their toughest pump applications...

Water & wastewater - New SAF range is proven fish friendly

In 2007, legislation was brought into eff ect to tackle the rapid decline in global populations of the European eel. Trials show that Bedford Pumps’ new SAF range of pumps are fish and eel friendly with no direct mortality observed from exposure to the pump. Bedford Pumps has just installed its fi rst fi sh friendly pump at a new pumping station in Kempsey, the first station in the UK to comply fully with the new EU regulations.

Digital dosing for off-gassing needs

When a US wastewater treatment plant in South Carolina saw lower flows than expected, due to a delayed housing project, the facility experienced repeated vapour lock resulting in higher operational and chemical costs. The manual dilution operation resulted in increased operational and chemical costs, so a solution was sought in digital dosing technology.

Innovative solution for Kenyan water

A water services provider in Kenya's coast province has installed a new set of vertical multistage pumps at its water treatment plant following a failure. Mawasco, based in Malindi, Kenya, procured a set of Poldap Dalgic Pump sets from Konya in Turkey as replacements. Shem Oirere tells the story.

Water & wastewater - Aerators deliver at water treatment plant

A team of aerators and an ejector system from Tsurumi at a water-treatment plant in Tyumen City, Russia. The plant, which provides clean drinking water for thousands of people, was suffering from regular shutdowns and rising costs caused by blockages. But the Tsurumi pumps have got things back on track with a mechanical aeration system consisting of two TRN aerators and a BER submersible ejector.

The pump operator's contribution

Pumping is a highly energy-intensive process. Here, Larry Bachas, aks 'The Pump Guy' demonstrates how to achieve the greatest energy savings with process pumps, for the least expense - by training the pump operators to optimize the performance of their pumps.

Succumbing to effects from climate change

The climax of the water shortage crisis in Katima Mulilo Town Council in Namibia’s Caprivi region hit a crescendo when two water pumps, installed at Africa’s fourth longest river, the Zambezi, failed. Both the town and government are looking for a solution. Could a vertical multistage in-line centrifugal pump in a situation where water levels cannot be regulated and there is a possibility of the pump pulling in destructive materials from a water source be the answer?

Sugar milling plant seeks hydraulic pump

The need for an energy conserving pumping solution, that would require minimum installation costs and is flexible in meeting variations in operating of a sugar milling plant, has led a sugar manufacturing company in Kenya to seek a hydraulic oil pump with a complete electric motor. Nzoia Sugar has opted for this hydraulic pumping solution to take advantage of its flexibility to accommodate not only wide range in quality of cane delivered but also in mill settings.

Avoiding dry run conditions in plants

When one of the top electric generating plants in the U.S. experienced a cataclysmic event resulting in the shutdown of a critical high energy boiler feed water pump, operators called on Quadna, a DXP company, for help. The pump was sent to Quadna’s headquarters for a teardown, upgrade and rebuild. Quadna engineers recommended using DuPont Vespel CR6100 for the booster pump’s bushings and casing wear rings.

Battling the energy crisis with technology

Worldwide, countries have made commitments to significantly increasing their share of electricity generated from renewable sources by 2020. Sulzer Pumps supports fulfilling these targets with pumping solutions and services for concentrated solar power generation, geothermal power generation, as well as for the storage of electrical energy produced from renewable sources.

Battling the energy crisis with technology

Worldwide, countries have made commitments to signifi cantly increasing their share of electricity generated from renewable sources by 2020. Sulzer Pumps supports fulfi lling these targets with pumping solutions and services for concentrated solar power generation, geothermal power generation, as well as for the storage of electrical energy produced from renewable sources.

Power company invests in irrigation scheme

The Mid Canterbury district of New Zealand’s South Island has long been recognised as the premier farming district in the country. In order to maintain its status and improve productivity, an irrigation scheme has been developed that will ultimately bring more than 17,000 lt/sec of water to more than 40,000 hectares in the region and benefi t the region by NZ$100 m annually. Bryan Orchard reports from New Zealand.

Aqueduct project uses vertical power

The Delta-Mendota Canal/California Aqueduct Intertie project, one of the US’ newest and largest pumping projects, went online recently. The big pumps that move the water are each powered by a big vertical pump motor — which is exactly the type of application a little group of engineers envisioned when they came up with the idea of going vertical with pump motors, some 90 years ago.

Progressive cavity series of success

A company in Finland was looking for a progressive cavity pump for its water & wastewater treatment plant. An approach from a Finnish company led to the fi tting of a compact solution specially engineered for industrial slurry and paste applications. The present pump is feeding bio-sludge to decanter centrifuge. The customer was impressed by its silent operation and it how it exceeded expectations.

Continuous flow – passing the test

For applications where a consistent water flow at low flow rates is essential, gear pumps can provide a useful solution. They can be run for long periods between maintenance, making them suitable for continuous duty applications. But could a digital drive gear pump deliver the slow, pulseless water flows that continuous flow tests for micro-pollutants require? Hadas Mills reports.

An inside look at SPX Technology

At the ACHEMA show in Frankfurt in 2012, World Pumps reviewed some of the latest developments at SPX Flow Technology.

Hydropower from pumps-as-turbines

Brazil is known for its use of hydropower, but when a small, remote tourism complex in a Brazilian nature reserve needed additional power supply, a conventional hydropower solution was deemed too expensive. A more affordable option came in the form of a centrifugal pump driving an electric motor acting as a generator.

South & Central American fiesta

The South and Central American markets have experienced tremendous growth over the last decade creating opportunities for domestic and international companies. A number of trade associations are emerging making the region attractive – not only for the traditional oil & gas and mining companies– but also in water, wastewater, biofuels and other sectors.

Re-powering reclaim water systems

In the mining industry, production is directly related to the plant’s total pumping capacity, and reclaim systems are the main source of water. With the pressure on to improve processes, Petar Ostojic discusses how pump manufacturers can help mining companies re-power their reclaim water systems with custom engineering solutions, improving pump capacity and reducing energy consumption.

Brazil – a strategic oil & gas location

With the discovery of extensive new oil reserves off the Atlantic coast, Brazil is becoming an increasingly important location for the oil & gas industry and its suppliers. This, combined with the presence of one of its biggest customers, is why one company has located its facilities in Jundiaí, north of São Paulo. Here we see what types of packages are in demand.

Reducing leaks with AC drives

Leakage is a common problem among many water utilities. It is often caused, and made worse, by the pressure in the water mains being kept at a higher level than demand necessitates. One solution to this problem is to use ABB AC drives to regulate and maintain a more appropriate system pressure, bring savings in cost, water and energy.

Software assisted asset management

Investment planning and ensuring compliance with regulations has always been important in the UK water industry, but with increasingly complex regulatory frameworks and expanding assets, this task has outgrown the capabilities of simple spreadsheets. Stronger software tools are needed to achieve service targets whilst keeping costs as low as possible.

Remote controlling water and sewage

Monitoring and controlling water and sewage assets across the UK can be a challenge, but utilising modern telecommunications from M.A.C Solutions means utilities can now access information in real-time. This enables not only quicker response times, but also more appropriate action as the nature of a problem is known before engineers reach the site in question.

Moving abrasive and corrosive liquids

It is difficult to find a reliable and cost effective pump for applications having both corrosive and abrasive media. The equipment is expensive to buy and maintain, and safety for those using the equipment is a headache, given their hazardous applications. One solution is a pump using standard parts, while various linings allowing for quick delivery at reasonable costs.C. Daniel Urquhart from RamParts LLC discusses the options.

Reducing costs in parallel pumping

Pumps operated in parallel can be a mixed blessing. A well thought-out design, correctly operated, can do wonders for handling variations in duty point but poor operational procedures can be a source of excessive energy consumption, significant maintenance overspends and poor system reliability. John Tonkin discusses the details of one such installation.

A Middle Eastern vision of progress

The Saudi Pump Factory (SPF), headquartered in Riyadh, Saudi Arabia, is a pump and valve manufacturer providing fluid handling solutions to meet customer requirements in the oil, gas, chemical, industrial, municipal and agricultural sectors. This article looks at the company’s products, capabilities and plans for the future.

Oil pipeline from Siberia to the sea - the role of booster pumps

The idea of transporting oil in pipelines from inland wells to sea ports, was suggested by Russian scientist Dmitri Mendeleev in 1863, and in 1878 the American Nobel brothers built a pipeline in the US. Tested and tried as the concept is, the transportation of oil across 4857 km is still no mean engineering feat. HMS Group describes the pump technology involved.

A muddy challenge for All-Flo pumps

An oil industry processing equipment supplier was experiencing a growing demand among their oil & gas customers for equipment to handle the rigours of transferring drilling mud from the wellhead. Not only does the equipment have to cope with the difficult mud itself, but also sand rock and concrete contamination. All-Flo set out a solution.

Brazil – a strategic oil & gas location

With the discovery of extensive new oil reserves off the Atlantic coast, Brazil is becoming an increasingly important location for the oil & gas industry and its suppliers. This, combined with the presence of one of its biggest customers, is why one company has located its facilities in Jundiaí, north of São Paulo. Here Sulzer Pumps looks at what types of packages are in demand.

Speed control for food and drinks

The food and drinks industry's requirements are as diverse as its products, placing high demands on processing equipment. From cheese curding to dairy processing, the industry needs solutions that involve process automation, speed control and, perhaps above all, reliability – all done at high efficiencies and at as low costs as possible, says Grundfos.

Re-powering water reclaim systems

In the mining industry, production is directly related to the plant’s total pumping capacity, and reclaim systems are the main source of water. With the pressure on to improve processes, Petar Ostojic from Neptuno Pumps discusses how pump manufacturers can help mining companies re-power their reclaim water systems with custom engineering solutions, improving pump capacity and reducing energy consumption.

Testing, testing – from 10 to 300 kW

Creating a single test rig for drive motors in the range of a few kilowatts (kW) to over 300 kW can seem like a daunting task, but through the application of accurate, variable speed control and customisable software, the feat has been achieved by Vacon. Even better, operators can set parameters at the push of a button.

One-stop-shop for high purity media

The pharmaceutical and biotechnical industries need increasing volumes of very clean water. The requirement for high purity media systems, is rising accordingly, but water generation quality fluctuations or supply bottlenecks can have far-reaching production line consequences. Bosch's Helmut Sommer reports.

Efficiency through indirect measures

Peripheral services to pumps, such as seal water or certain consequences of pump design, can combine to create true product transfer process efficiency. If not properly considered, indirect factors can directly affect this value, says Mouvex's Wallace Wittkoff, who explores how pump design can affect three significant efficiency areas.

New standards for the world circulator market

From 2013 circulator pumps sold in Europe will have to meet new regulatory measures. Having been involved in discussions as to what these energy standards will be, Grundfos is both ahead of the game and part of it. It is launching a new range of products for the HVAC market.

Maintaining deep well submersibles

Maintenance of submersible pumps is complex due to the depth at which they are installed, which makes access difficult. Correct facility design to extend the time between failures and the monitoring of several parameters to determine the pumps’ performance during operation are therefore vital factors, as Miguel Ortiz from FACSA and Alejandro Palomo from Salinas y Perez report.

Paris fountains get a new lease of life with KSB

When the fountains in the Trocadero Gardens near the Eiffel Tower in Paris needed extensive renovation work, it was not only a question of what equipment to choose but also how to get it through very restricted access routes. KSB's solution was to dismantle and then rebuild the machines powering the fountains in situ.

Load shifting aids energy saving: part 2

A South African initiative to encourage load shifting prompted an in-depth review of pumping processes at the Tugela paper mill’s water supply plant. After a general overview of the project, the first part of this two-handed case study1 focused on the plant’s high-lift pumping station. In this concluding part, Graeme Harding from the Magnet Engineering Division considers flow control, and assesses the transfer and low-lift pumping stages, and plant piping and instrumentation, before presenting the final solution.

A brief guide to IFAT

World Pumps takes a look at the key themes covered by German water and sewage trade fair IFAT which in 2012 promises to be the biggest ever.

Caprari moves further into high-flow market

Caprari’s recent announcement of a strategic alliance with French manufacturer Peme Gourdin to launch the new High Flow Line range demonstrates a double move. It is aimed at satisfying both the demand for pumps capable of conveying high water capacities and at supplying high-end engineered products to various demanding industrial markets. World Pumps talked to Dr Luca Pellegrini, about this alliance and why it is a milestone in the company’s strategic direction.

Modern technology for coating systems

Positive displacement air-operated double-diaphragm pump enhancements help operators improve performance, product containment and energy efficiency, says Wilden's Xavier Rasotto. In this article he examines the challenges to be overcome in maximizing paint and coating production processes using these machines in what is one of the most important industries on earth.

Demand for experts exceeds availability

Specialist knowledge is becoming ever more important in an increasingly competitive market place. This is why the international distance-learning study programme Pump Engineer, which is in its 7th season, is providing a new course in English starting in March this year. The course offers 50 days of training, covering all areas of the industry.

Plain sailing on the seven seas with Grundfos

With the vast majority of today’s trade being transported on the seven seas, there are huge opportunities for equipment providers. Not only do vessels need solutions for handling cargo such as cranes and pumping facilities, but the vessels themselves need equipment optimised for the marine environment – say for example an engine cooling system from Grundfos.

Acid mine drainage: can we fix the mess?

Mining is a major driver of the South African economy. However, the country’s water supply is under serious threat of pollution from untreated acid water draining from mines. Keith Gass from Verder Pumps discusses the issues involved and considers the role that peristaltic dosing pumps can play in rectifying the pH balance of mine water.

SPP protects new Singapore landmarks from fire

‘The Star’ – Singapore's Integrated Cultural, Retail and Entertainment complex, is now well on the way in the one-north precinct, and is said to elevate environmental excellence to new heights. With completion expected in the second half of 2012, the building has been designed, with help from SPP, to meet world-class acoustic, environmental, comfort and fire safety standards.

Off-site assembly for London Tube

Neasden Depot is the largest depot in the UK’s London underground network and the main maintenance depot for the Metropolitan tube line. A major refurbishment project, aided by Armstrong Pumps, is currently under-way at the depot and will create facilities to accommodate a new fleet of air conditioned tube trains, but due to the size of the project, delivery deadlines are tight.

Selection of gas compressors: part 3

In this continuing series of articles, Eduardo Larralde and Rafael Ocampo survey the current state of the art concerning gas compressors. Parts 1 and 2 explained the principles of compression processes and the classification of compressors, respectively. Part 3 explains the physical structure of one key class – the piston compressors.

Load shifting saves energy at paper mill

In South Africa, a major initiative to encourage load shifting and reduce strain on the electricity grid prompted one paper mill to investigate the pumping processes at its water supply plant. In this detailed two-part case study, Graeme Harding from Magnet Engineering Division takes us through the investigative process leading to the final solution, which has yielded a 25% energy saving since implementation.

Apprenticeships and pump design

An apprenticeship programme and innovative designs that meet new market needs are basic requirements for continued success in the manufacture of centrifugal pumps. In this article, Dr Edward Grist gives his views on these two topics based on nearly 60 years of experience working with the UK pump industry.

Almatec customised fix for abrasive PV slurry

The manufacturing of wafers for photovoltaic (PV) solar panels requires a precise process that puts production equipment to the test. Several of these processes involve highly abrasive slurries, which are a mixture of glycol and powdered silicon carbide. The challenge is to find equipment that can handle both wet and dry applications in a corrosive environment.

Xylem makes a big splash

The splitting off by ITT Corporation of some of its most well known brands to form Xylem, a company dedicated to the water and wastewater industry, did take some people by surprise. However, the move has proved to be a shrewd one and hold great promise for the future as Mike Kuchenbrod explained to World Pumps.

Supplying to the US oil and gas industry

New oil and gas projects offer significant opportunities and challenges to the US oil and gas industry and to the pump business. Many customers are seeing attractive economics, so they want deliveries as soon as possible. In this article Keith Loria talks to a number of suppliers and finds out what the demands are and how they can match them.

Vacon control system for jet trenching

Laying cables and flow lines in the subsea environment sometimes requires trenches to be formed in the sea bed. One remotely operated vehicle, the ultra-trencher (UT-1) submersible, uses hydraulic jets to perform this task. However, it required the development of a compact pump drive system from Vacon suitable for use in compact marine environments.

The fundamentals of heat transfer plants

Many industrial processes rely on heat transfer plants, which bring a host of challenges for equipment providers. One manufacturer has found Allweiler solutions for most ontingencies – whether water, oil or synthetic oil is used as the heat transfer fluid; and temperatures fluctuating from the negative to close to 400°C.

South & Central American fiesta

The South and Central American markets have experienced tremendous growth over the last decade creating opportunities for domestic and international companies. A number of trade associations are emerging making the region attractive – not only for the oil & gas and mining companies – but also in water, wastewater, biofuels and other sectors.

Diagnosis using acoustic emission

Many industries today benefit from condition monitoring (CM). Although vibration analysis is the most common method, the emergence of new techniques stimulates CM experts from Zagros Petrochemical to use them to achieve the best diagnosis. This case study demonstrates the profitability of the promising acoustic emission technique in the timely diagnosis of a bearing defect. Zagros' Hamid Karimi explains.

Submersible pump solution for Kenyan water

A water services provider in Kenya's coast province has installed a new set of vertical multistage pumps at its water treatment plant following a failure. Mawasco, based in Malindi, Kenya, procured a set of Poldap Dalgic Pump sets from Konya in Turkey as replacements. Shem Oirere tells the story.

Calculating pipes and duty points with Vogel Software tools

Energy savings can be obtained in several ways, but before manufacturers turn to hydraulic optimisation of units or apply new electrical drives or powerful control systems, they should look at the dimensions of the pipelines and make sure they get the duty point specifications right. This can be done with the aid of web-based tools from Vogel Software.

Grundfos dosing for off-gassing needs

When a US wastewater treatment plant in South Carolina saw lower flows than expected, due to a delayed housing project, the facility experienced repeated vapour lock resulting in higher operational and chemical costs. The manual dilution operation resulted in increased operational and chemical costs, so a solution was sought in Grundfos' digital dosing technology.

Hydropower from KSB pumps-as-turbines

Brazil is known for its use of hydropower, but when a small, remote tourism complex in a Brazilian nature reserve needed additional power supply, a conventional hydropower solution was deemed too expensive. A more affordable option came in the form of a KSB centrifugal pump driving an electric motor acting as a generator.

Frothing fix for problem printer

Frothing and breakdowns were regular occurrences for printer Portishead Press as their air-operated diaphragm pump and its seals could not cope with the caustic coating solution used by the printer. The company needed a pump that could move the coating fluid quickly, without introducing air, so they looked at a Watson-Marlow close coupled peristaltic pump to provide the answer.

Diaphragms enhance gas production

Horizontal drilling and hydraulic fracturing technologies grant access to natural gas encased in shale formations. However, this is just the start of overcoming challenges associated with a shale well’s 20 plus year life expectancy. New diaphragm pump technology from Neptune Pump Company is providing solutions to the harsh realities of shale well production.

Pumps and process energy optimization from Schneider Electric

Pumps represent a significant target for energy savings. The need to measure, monitor and manage consumption is viewed as an integral part of all process systems. Here, Jack Creamer from Schneider demonstrates that a process energy optimization approach can allow energy consumption to be analysed and managed, giving potential efficiency gains of up to 30%.

Reducing pressure: increase efficiency with Sulzer

Some industrial processes require the throttling of high pressure fluids. Hydraulic power recovery turbines can convert the excess pressure into mechanical shaft energy and increase the overall process efficiency. Here, Ron Adams from Sulzer Pumps looks at how reverse running pumps can be used as turbines as an economical solution to recover energy.

Shell hydraulic fluids – a new generation

At the heart of any hydraulic system, pumps are exposed to severe wear by running at high revolutions over extended periods of time, often handling high temperatures and pressures. Today, some of the latest lubrication science is creating even greater benefits from this often-forgotten component, says Shell's Mark Draper.

Energy optimization for Grundfos booster sets

C. Kallesøe, J. Aarestrup and K. Rokkjær of Grundfos analyse the control and design of booster sets from an energy perspective. They investigate how the structure and control can be used to minimize energy consumption, and demonstrate that equally sized pumps equipped with speed control and running at the same speed are a safe design choice.

Quality inspection from a single source

In oil and gas pipes, the quality of the root pass of a weld is critical to the structural integrity of the girth weld. Optical Metrology Services Limited (OMS) discusses how video inspection and internal weld scanning tools are being used to check weld quality on pipes and other deep sea subsea oil and gas structures.

Surge protection in tall buildings

As water companies reduce water pressure in the domestic mains to reduce leakages, tall buildings are becoming reliant on booster pumps to provide water at sufficient pressure to enable normal daily living. This has revealed a potential threat – hydraulic shock, says Gary Wheatley from Wilo (U.K.) Ltd.

Harmonics can ruin your power supply

Harmonic distortion is a form of pollution in the electricity supply that can make equipment behave erratically. They can be difficult to identify and users often attribute the symptoms to other causes, frequently applying mitigating action that fails to solve the problem. Here, ABB gives a few examples of how harmonics can be effectively dealt with if properly identified.

John Crane dry split seal is the perfect deal

The pumping of high temperature titanium tetrachloride can cause manufacturing and safety issues. So how can we ensure that manufacturing processes are safe from chemical attack? The combination of a John Crane 3740D seal and DuPont’s Vespel bearing sleeve material resulted in total success, as Vic Lundberg reports.

Using motors to detect centrifugal degradation

Centrifugal pumps are widely used in industry and many are driven by induction motors. Failure due to pump bearing degradation would result in an unscheduled shutdown leading to production and revenue losses. Parasuram Harihara from Corning Incorporated and Alexander Parlos from Texas A&M propose a technique to detect bearing deterioration using the motor’s electrical signals.

South America for growth and diversity

One of the biggest areas of growth for the pump industry over the last two decades has been in the South American and Latin American markets, particular in the oil and gas, mining and power generation industries. This expansion is partly thanks to the NAFTA agreement, changes in customs regulations and the desire of major manufacturers to diversify. Keith Loria reports.

Optimizing centrifugal process speed and efficiency

Jeremy Salisbury from Brammer UK shows how ensuring that a centrifugal process pump operates at optimum speed and efficiency is key to maintaining productivity, reducing energy consumption and maximizing product life. He examines the technologies available to optimize operation and reliability, and the paybacks achievable through investment in appropriate control.

VSD energy savings in submersible systems

While considerable energy savings can be achieved by installing variable speed drives in standard pump systems, VSDs are less common in submersible applications, being more difficult to implement. However, it is well worth the effort as the energy savings and process improvements can be enormous. Here, ABB examines the main factors to consider.

Reducing CO2 with Sulzer technologies

While it is forecasted that fossil fuel power generation will remain an important energy supplier in the next 20–30 years, other emerging technologies aim to avoid the production of CO2. Here, Sabine Sulzer from Sulzer Pumps looks at new, CO2 emission-free energy technologies, such as solar energy and bio-fuels, as well as carbon capture and storage (CCS).

Gentle handling with Watson-Marlow pumps

Processing and handling foodstuffs are critical operations that often demand specialist pumps, such as pulse-free types that can gently displace a perfectly even volume with each revolution. These machines are ideal for use in the food and beverage industries, among others. Here are a few case studies illustrating different aspects of food & drink processing using Watson-Marlow pumps.

Selection of gas compressors: part 2

In this multipart series, Eduardo Larralde and Rafael Ocampo aim to provide a comprehensive survey of the current state of the art concerning gas compressors. Following the elucidation of the basic concepts and theory in the opening article, the series continues with the classification of different compressor types.

Sanitary Drum Unloading Solutions

Installing a Drum Unloading System can help to prevent hazardous processes effects due to potential employee injury and food safety. It also will save time and money thanks to the recent advancements to the Drum Unloading System by Graco.

Sensing with KSB's PumpMeter

Transparency of operating conditions is of vital importance, because this is the only way for operators to ensure that their pumps run at optimum conditions, reducing energy consumption and increasing service life. This article examines KSB's PumpMeter, that is designed to measure pump input power for optimum operation.

ITT spins off water company

Water movement, treatment and testing specialist, ITT Corporation, recently underwent a reorganisation. The company has appointed new executives to global positions as a result, and here they talk to Keith Loria about their roles in this transition to a new standalone pumps and water equipment firm.

Enhanced safety for nuclear power

Many countries have been reassessing nuclear power to help obtain a sustainable energy mix. China is planning the latest generation of intrinsically safer reactors, although it temporarily suspended approvals following Japan's Fukushima accident. Ranald Patrick describes a steam turbine driven pump that provides reliable reactor cooling.

Centrifugal pumps: avoiding cavitation

Cavitation has been identified as one of the leading causes of reduced reliability in centrifugal pumps. Joseph Askew examines the causes of cavitation and discusses real-world solutions to correct them. The same troubleshooting techniques can also be applied at the design stage to prevent cavitation from the outset.

Low sulphur fuels cause viscosity woes

The EU directive calling for the use of marine fuels with a far lower sulphur content is causing pump manufacturers to examine how pumps that rely on the lubrication provided by heavier fuels can comply with this legislation. One rotary pump specialist has responded by redesigning its triple screw pump.

Redirecting pump PdM emphasis

In spite of investment in predictive maintenance (PdM) and considerable effort being focused on reliability engineering, process pump users continue to experience unexpected repeat failures. Heinz P. Bloch examines both repeat and random failures and explains some of the elusive causes.

Procurement in the municipal industry

Choosing which pumps to buy can be a complicated process for the operators of wastewater treatment plants. With the desire for energy savings and pump efficiency at the top of the wish list, it is a competitive market. Keith Loria presents an insight into the procurement process, from new advances to buying and tendering.

PTFE diaphragm for maximum pressures

An innovative pump head for the highest pressures features a PTFE diaphragm with special clamped support. The result is more cost efficient than conventional metal membrane pump heads, yet provides very high pressures for the latest oil and gas sector applications. World Pumps talks with Lewa's Martin Dreher.

Precise metering for a clean water supply

A charity working with the Gran Sous community in Haiti required a solution to a longterm water purification problem. A technology was needed which could accurately dose the community’s water supply with sodium hypochlorite solution. An electronic diaphragm metering pump was chosen which provided an easy to operate and maintain solution.

Giving a sapphire green credentials

The stunning Istanbul Sapphire is the tallest residential building in Europe and its first true ecological one. The building has had to cater for residential and leisure zones alongside a large shopping mall. As a result, its pumps had to meet the heating, cooling, wastewater, drainage and potable water applications demands, while offering environmental solutions.

Aerator investment aids Croatian tourists

With Croatia fast becoming a major hotspot for European sun-loving tourists, its campsites are investing in infrastructure to benefit from increased tourist demand. One campsite, Camp Škrila, found that installing submersible aerators would provide an immediate, costeffective upgrade to its existing wastewater-treatment facilities.

Flood prevention refurbishment

At the UK coastal city of Kingston-upon-Hull during high tides, parts of the city lie below sea level and the surrounding plain is at a higher level. Therefore, well-maintained drainage systems are an essential flood-protection strategy and the city’s existing pumping stations have been undergoing much needed refurbishment.

Prestige development in Indian Garden City

A city in India is the site for an enormous mixed use development, featuring residential apartments, leisure facilities, office space and retail outlets. The developers wanted the pumping systems to echo the project’s ambitious outlook and found a solution in a range of water and HVAC pumps.

Flexible supply for extruder gear units

A European manufacturer of extruder gear units and vertical mills required individually configured, high capacity pumps to supply the gear units with lubricating and cooling liquid. Screw pumps proved succesful in meeting these elevated capacity requirements. The design avoids noise generation and provides a long service life by preventing premature wear to the pump.

Driving down operating costs

Reduced energy consumption, increased service life and, therefore, improved profitability – these are all possible using the latest industrial pump technologies. Such machines still offer huge potential for savings that can be tapped using a new system efficiency service.

Power station feedwater pumps

Proven satisfactory operating experience together with the lessons learned from the past provide a sound basis for commercial specifications. In this article, Dr Edward Grist reviews experience gained over a number of years applying this approach to the specifications for power station feedwater pumps.

Intelligent control of sewage pumps

Pump blockages and rags are a significant barrier to realizing energy and operational efficiencies in wastewater pumping throughout the world. In this case study, Graeme Moore of Scottish Water details the blockage problems at the company’s Levenhall Sewage Pumping Station and discusses the approach taken to their solution.

AODD efficiency improvements

Recent advancements in air distribution systems (ADS), including efficiency management equipment, have resulted in drastically improved overall efficiencies of air-operated double-diaphragm (AODD) pumps. This, in turn, has resulted in better reliability and very considerably improved energy cost savings, reports Curtis Dietzsch.

Managing solids in wastewater

Wastewater often carries solid wastes and its effective management to prevent blockages and prepare for any recycling is essential. Efficient pumps are needed, but so are mechanisms to remove all solid wastes, which may be rag, paper, sludges, biosolids and abrasive particles. Macerators provide one way of tackling the problem.

Selection of gas compressors: part 1

Gas compressors find a wide range of uses, from internal combustion engines and industrial processes to domestic gas supply and refrigeration. In this first article of a nine-part series, Eduardo Larralde and Rafael Ocampo set out the basics, discussing the theoretical laws that govern the behaviour of compressors and the parameters fundamental to their design.

Miniature non-contact displacement sensors

There seems to be no end to the continuing drive towards the miniaturisation of displacement measurement sensors, particularly with regard to integrated electronics and to smarter sensors that offer an abundance of features. This article discusses how they can bring real advantages over existing technology.

High energy pumps: a major safety issue

Catastrophic failure is a possible outcome when inlet pipework is over-pressurized or when the rotor of a high-energy pump seizes. Both can result from the low-flow protection failing to act promptly. Dr Edward Grist shows that pipework layout, pump design and leak-off system design greatly influence the risk of failure.

Studying through distance-learning

To correctly evaluate the operational and maintenance state of a pump, reasonably high levels of technical knowledge and operational experience are required. The ability to learn these skills is offered through two academic distance-learning study programmes: 'Pump Engineer' and 'Certified Energy Consultant for Pumps and Pump Systems'.

Reducing downtime for water in Wales

A Welsh water treatment supplier had problems with pumps that required a complete overhaul every six months, and greatly decreased process efficiency. Installing a new range of progressive cavity pumps made it possible to remove parts in situ and reduce maintenance downtime.

Seal makes fail-safe syringe pump

A California-based provider of syringe pumps wanted to manufacture a fail-safe pmp that would run 24/7 and avoid breaking or leakages. Collaborating with a seal manufacturer led to the creation of a self-lubricating polymer seal that allows precision dosing of liquids and helps reduce downtime.

Hospital boiler helps house efficiency

A European hospital identified that an advanced technology combined heat and power (CHP) plant would reduce energy costs and reduce overall carbon emissions by generating its own electricity. By using 3D computer modeling it was able to determine how best to optimise the space and reduce footprint, significantly reducing any impact the project might have on day-to-day care.

Healthy attitude to carbon footprint

A new health and leisure centre in the UK required a holistic approach to the energy-efficiency of its HVAC system. A range of centrifugal pumps for heating and cooling, and complete pressure boosting systems allowed the centre to reduce its carbon footprint, focus on energy saving, and stay healthy for longer, aiding the whole community.

GE high tech for oil & gas sector

GE Oil and Gas provides turnkey solutions for refinery and petrochemical applications. World Pumps asked Claudio Materazzi, Chairman of the company, about the sectors it addresses and the rationale behind the company’s recently launched liquid CO2 re-injection pump, designed to remove oil from depleted fields.

The challenge of leak-free pumping

With their leak-free design, high reliability and reduced footprint, canned motor pumps are capable of handling even the most difficult liquids safely and economically. As the requirements for environmental protection and safety increase, demand for these pumps is growing steadily. Bryan Orchard provides the details.

New approach to cylinder measuring

Using sensors to measure the displacement of hydraulic cylinders has meant that the sensors can be susceptible to dirt, dust and soiling. These limitations demand a new approach. By integrating a draw-wire displacement sensor, piston rods no longer have to be deep bore drilled using specialist equipment.

Optimal control in sewage applications

This paper describes the possibilities for energy optimisation in sewage pumping stations, and why continuous optimisation is necessary in order to gain the full benefits. Here we look at new up and coming features that will enhance performance-on-demand, ensuring that minimum energy consumption is always obtained despite of changes in the system.

Soft-starting drives help regulate flow

A significant water reclamation plant in Singapore required variable speed drives to handle its sewage pump motors. Careful handling was required to avoid torsional stress on the motor shafts, which were liable to break. A range of medium voltage variable speed drives offered smooth starting and improved water flow.

Local relief from Australian flood

The floods that hit Australia at the beginning of 2011 were devastating. In Queensland alone, the floods covered an area the size of France and Germany combined. Here’s how one company provided each dealer in the affected areas with submersible pumps to be used as free loan pumps to assist local communities with their relief efforts.

Axial flow impeller shapes: part 2

In this second of two articles concerning axial flow impellers, Punit Singh and Franz Nestmann of Karlsruhe Institute of Technology focus on backward curved impellers, revealing hydraulic behaviour that is interesting and unexpected in pump and turbine operations respectively. They also compare the performance of forward and backward curved impellers to determine the optimum impeller shape for turbines.

London calling for bridge maintenance

Tower Bridge is one of the most well known tourist sites in London, UK. But like other bridges it requires up to date technology to keep it running successfully. A new dewatering pump transfered rainwater and ground water from the River Thames to the surface, keeping the towers free of water and ensuring the future of this historic structure.

Ship motor monitoring helps reduce repairs

BP required condition monitoring of the seawater pump motors on board its fleet of marine hydrocarbon carriers. It installed a unit which takes information from the voltage and current of the motor, and uses intelligent mathematical modelling to monitor faults. Using this new technology, it found that impeller related damage was affecting the pumps.

Energy usage in VWCS applications

The installation of vacuum wastewater collection systems to collect and transport domestic wastewater is increasing, leading to more frequent questions concerning their energy usage. Li Min and Zhou Jingxuan of Huazhong University of Science and Technology in China have derived a theoretical model to provide the answers.

Releasing the power of coal-bed methane

A European pilot production coal-bed methane extraction plant required an alternative to the electrical submersible pumps used for dewatering. The pumps were difficult to size correctly, and would be difficult to remove for repairs. High pressure, triplex positive displacement pumps were selected as an alternative, providing an efficient and effective solution.

24-hour successful system changeover

When a social housing scheme’s heating system reached the end of its useful life, it looked as though the facility would have to shut down for maintenance during the winter months. The off-site construction of an integrated heating system made it possible for the changeover of the boiler plant to take place within just one day.

Using hybrids for flow maintenance

Using hybrids for flow maintenance Frank Hassert discusses why many applications benefit from using multifunction hybrid pumps, which combine side-channel technology with standard centrifugal pumps. The side-channel pump hydraulics enable the pump to achieve pump heads many times higher than those generated by a centrifugal pump.

Climate-friendly service for hotel

While a completely carbon neutral solution is not yet possible, a luxury hotel in Copenhagen comes close to achieving it by deploying some of the latest environmental and energy technology on the market. A ground water cooling system allows recycled heat from the summer months to be used during the cold winter months.

Engineers’ changing perception of ‘pots’

Potentiometers have been around for a long time and are still, by far, the most commonly used position sensor in pumping systems. So why does every design engineer seem to be looking for a non-contact alternative? Mark Howard from Zettlex Ltd examines this phenomenon and explains the pros and cons of potentiometers.

Off-site packaging for easy installation

A streamlined solution was needed for the building service element of a landmark building under construction in the City of London. The high efficiency heat exchange modules, variable speed pumps and booster sets were packaged off-site and supplied in ready-to-install modules. This cut installation times and reduced deliveries to the busy site.

Dewatering emergency under Alpine glacier

A huge pocket containing some thousands of gallons of water had formed under a glacier on Mont Blanc. It had to be emptied before it burst and endangered the lives of the people below. The choice fell on Caprari mixed flow pumps to empty the equivalent of more than 20 Olympic swimming pools.

Accurate dosing with single shot dispensing

A Belgian brewery required a pump which could accurately dose liquid sugar into beer, in order to fulfil an ongoing order. A close-coupled peristaltic pump was chosen which features accurate single shot dispensing. The peristaltic technology eliminates the risk of contamination by ensuring nothing but the tube touches the fluid.

Maximising biogas production efficiency

The biofuels sector, including biogas, is a fast growing industry because it means less reliance on fossil fuels, and it is sustainable. However, biomass is a difficult media, so has to be broken down to allow pumping to take place efficiently and to maximize biogas production. Harald Vogelsang explains.

Axial flow impeller shapes: part 1

The increasing importance of low head applications necessitates a study of the different axial flow pump impellers used for both pump and turbine operations. In this first of two articles, Punit Singh and Franz Nestmann of Karlsruhe Institute of Technology survey the available impeller shapes and present a theoretical model that reveals the behaviour of the impellers’ internal hydraulic variables.

Preventing blockages from heavy rag mass

Blockages at a European sewage treatment works were causing downtime and flooding. Replacement pumps were sought on a ‘try before you buy’ basis to prevent a repeat of previous problems. During the trial period, no blockages occurred, and the pump proved capable of coping with the flow without apparent damage or wear.

Centrifugal market: optimism or growth?

Centrifugal pumps have dominated the global pump market for most of the last century. However, does the current financial crisis mean that their long growth potential is assured? Here, the market research organisation Frost & Sullivan considers some of the factors that continue to drive the demand.

Efficient control with variable speed drives

A European wastewater treatment plant, built in an underground cavern, required an energy efficient and accurate water treatment process. The plant achieved this goal by using more than 50 variable speed drives, which provided the added benefit of reducing strain on the plant, leading to an increased operating life.

Energy efficient tool maintenance

Cost considerations and the trend towards energy efficiency have induced pump manufactuers to provide trouble-free solutions for machine tool maintenance. This article examines how centrifugal pumps with frequency-controlled motors, combined with the correct adjustment to their operating points, can lead to reduced lifecycle costs.

Low fuel lubricity in thin distillates

To meet future pollution control regulations, ships will be obliged to switch from viscous high-sulphur heavy fuel oil to poorly lubricating thin distillate fuels. By using seal-less pumps, two heavy lift ships working in northern waters are tackling the problems of premature wear, high repair costs and failure associated with distillates.

CM experience with boiler feed pumps

Nowadays, condition monitoring is widely used as an essential tool for the efficient operation of a production plant. Here, H. Sedaghati Nasab, M. Massoumian and H. Karimi of the maintenance department at Zagros Petrochemical Co in Iran discuss their experiences with a problematic boiler feed water pump and their route to the solution.

Transporting water for drought relief

In response to widespread drought in Andhra Pradesh, the Indian government launched a project aimed at irrigating the dry agricultural land. Pumps were needed to transport large volumes of water over long distances to the pumping stations being built. Vertical volute pumps driven by synchronous motors provided an efficient solution.

Problem solving in municipal projects

Municipalities in the United States are searching for environmentally friendly, energy efficient solutions to water and sewage issues. With a large number of important water and wastewater projects currently underway, the correct choice of pump is vital. Keith Loria examines how leading pump providers have helped with these decisions.

Recent activities in MENA countries

The Middle East and North Africa (MENA) regions have, collectively, the world’s largest supplies of oil and gas. However, other industries such as desalination, water supply, mining and power generation also provide an important market for pump suppliers. James Hunt gives an overview of some of the latest activities in these areas.

Packaged systems for water demands

Packaged pumping systems offer ease of installation, single source responsibility and a streamlined manufacturing process. This article discusses the best way to use them to satisfy the demands of municipal distribution systems, industrial process systems, non potable and water reuse systems and domestic water booster systems.

Seal-less pumps work in polymer injection

A US specialist in enhanced oil recovery systems required pumps for a polymer injection facility in a Wyoming oilfield. Seal-less diaphragm pumps were selected for the 24 hour facility. Their ongoing long-service performance and gentle handling of the polymers led to additional pumps being installed to extend the facility.

Feeding the grid from river water

The German Federal Government supports the use of regenerative energy. Two prototype river turbines were installed in the river Rhine, near the German town of St Goar. The turbines successfully provided the town with electric power from river water, prompting the company who designed them to put them into commercial operation.

Reducing avoidable pressure losses

Industrial plants frequently employ oversized pumps out of caution. Pressure losses, and consequently energy consumption, may thus be unnecessarily high. Dr Walter Schicketanz explains in detail how such avoidable pressure drops can be determined both theoretically and in the field, as well as examining how to reduce them.

Middle East boosts pump demand

Population growth and improved standards of living in the Middle East have greatly increased the demand for water and sanitation services, along with the need for more water for agricultural uses. Debbie Fox and Ann James of McIlvaine Company discuss potential opportunities for pumps in the region.

Handling molten salt for sun power

The concentrating solar power stations may supply a significant amount of the Middle East and North Africa’s electrical power needs over coming decades. However, this approach requires specialized pumps capable of handling molten salt at high temperatures with total reliability, as James Hunt reports.

Offsite plant speeds development phases

A media company in the UK required a number of packaged pump sets to complete three phases of new development. A series of pumps were chosen which incorporate elements of pre-design with the benefits of off- manufacture. The result is a reduction of the design, construction and installation phase.

Resolving high flow-induced vibrations

Atia Khalifa, Amro Al-Qutub and Yehia Khulief of Saudi Arabia's King Fahd University of Petroleum & Minerals present a case history in which problematic high flow-induced vibration in a boiler feed pump was studied and corrected. A combination of field measeurements and lab model testing identified the source of the problem.

New level of green for seal-less drive

Seal-less drives, together with sliding vane pumps, take the drive to reduce energy consumption and increase environmental protection without sacrificing performance to a new level. Mouvex's Paul Cardon says that these technologies provide significant advantages over gear pumps in the quest to reduce energy consumption and cost.

Turning sunlight into electricity

The International Energy Outlook 2010 projections, published by the United States Energy Information Administration, predicts a 49% increase in the total world consumption of marketed energy from 2007 to 2035. The escalating cost of fossil fuels, its availability, and environmental concerns, are forcing the world to find alternative sources of energy.

PTFE submersible bearings: part 2

Drs Fumitaka Kikkawa, Ryutaro Ogawa and Hiroshi Satoh of Mikasa Corp discuss the characteristics and advantages of submersible bearings made from PTFE. Here, the importance of the bearing material and the grooved structure is further elucidated with reference to dry-start' capability, abrasion resistance and vibration behaviour.

Pumping milk into Tamil Nadu homes

The food and drink market is a significant one for the pump industry. India is the largest milk producer in the world, producing 104.8 million tonnes annually, with consumption set to treble by 2020. World Pumps India talked to Tamil Nadu Co-operative Milk Producers Federation about milk production processes in the country.

Improving fatigue life for diaphragms

Fatigue-induced rupture of the rubber diaphragm is one of the most common causes of failure in submersible pumps. In this article, Amin Akhbarizadeh and Alireza Araghi of Iran’s Pars Koral Ghomes Co demonstrate how diaphragm fatigue life can be improved via simulation and new mechanical design.

Meeting building regulation needs

The British Pump Manufacturers Association Ltd. (BPMA) is seeking to bring energy saving domestic and non-domestic pumps into the revised 2010 Building Regulations, with DEFRA support. Steve Schofield, technical director, explains why this has come about and the implications.

Pump industry: merger & acquisition

Over the past ten years, the number of M&A transitions in the fragmented global pump industry proved it was not immune to the macroeconomic forces that stifled M&A activity in many other industries. Brendan Tierney presents an overview.

Handling water in tall buildings

This is the final instalment in our look at packaged booster sets in commercial buildings. Previous articles took in packaged booster pumps sets and variable speed booster pumps sets. This article examines handling water under pressure in tall buildings, highlighting the risks and identifying design solutions.

Improving sealing for submersibles

In this article, Alan Roddis examines a typical submersible pump to determine what changes can be made to improve sealing effectiveness. He concentrates on three primary elements of seal performance; seal design, seal face materials and sealing environment, and includes a case stufy to illustrate these changes.

Energy savings begin at pump

Sophisticated controls, VSD drives, efficient motors - but don't forget the pump! Paul Davis looks at how design fundamentals and the effects of pump wear impact directly on energy costs. Can seal-less pumps lead the way to more efficient systems?

Back to basics with desalination

This is another in our occasional series of ‘basic' articles. Courtesy of the Waterworks museum in the UK, we present some brief insights into the background and development of desalination pumps. The article gives an overview of reverse osmosis and multi-stage flash process.

About variable speed booster sets

This is the second in a three-part series looking at different aspects of booster sets. The first installment, about commercial building packaged booster pumps sets, examined the background, break tank supply, boosted water operation, expansion vessel storage, and traditional controls. This article looks at variable speed booster sets.

Longer life with welded claddings

Alan Robinson of weld overlay cladding specialist Arc Energy Resources discusses the benefits of using the various techniques to protect the internal surfaces of pumps handling difficult media from corrosion. Here, he argues that this can be more cost-effective than using highly alloyed materials for the whole machine.

A true measure of hydraulic efficiency

Many companies use manufacturer test-bed statistics to make purchasing decisions. However, these take little account of the effect the pumped media has on power consumption. To get a true understanding of the overall efficiency of their pump, a measurement of sustained efficiency over time using data from users' own pumping station assets is vital.

Holistic approach boosts performance

Vibration is an enemy of water and wastewater pumps. Phil Burge explores the latest condition monitoring solutions, and also examines how they can be integrated, as part of higher level asset efficiency optimization programmes, to overcome the problems caused by vibrations.

AODD Pump Efficiency AirVantage™

Warren Rupp, Inc. has developed a new, patent pending technology that optimizes the pump efficiency and utilizes adaptive optimization as pump application parameters change.

R&D - the key to moving forward

Investment in R&D is vital, especially during a recession, because it allows companies to meet the demands of new technologies and diversify. So says KSB's Dr Soenke Brodersen who describes how the company's research department develops products to meet new requirements.

Energy savings - VFDs and more

In these energy-conscious times, pumping applications offer the potential for significant energy savings. Variable frequency drives are commonly applied for this purpose but are not the only solution available. Complementary solutions such as soft starters and energy management systems are also explored here by Jack Creamer and Grant Van Hemert of Schneider Electric.

Taking a closer look at the S factor

In spite of the importance of suction specific speed (S) to cavitation behaviour, some users pay little attention to this parameter when they select and size a centrifugal pump. In this article, Behshad Moradi of PSN highlights the role the S-value plays in the hydraulic characteristics of centrifugal pumps and aims to make users more aware of this important factor.

Packaged boosters for commerce

This month sees the start of a three-part series that will build into a reference for commercial building packaged booster sets. This first part examines background and set design. The second part will look at variable speed booster sets, while the third will focus on high-rise building boosters.

Containment shells for efficiency

Pumps use a lot of energy, an increasingly important concern today. Here, Dipl. Ing. (FH) Jürgen Konrad looks at the latest designs and materials for containment shells fitted to magnetically-coupled pumps, which can save significant energy for quickly amortised initial outlay. Operators can profit too.

Metering today requires eco-design

Patrick Deniau of Milton Roy Europe takes a historical look at metering pumps, their long development, and the technological breakthroughs that have led to the most modern designs, including the very latest hydraulic actuated diaphragm types. Eco-design principles are now used to great effect.

Factors influencing slurry rheology

In this article from Algeria, A. Benretem with co-authors M. Benidir and R. Chaib discuss their study of the rheological behaviour of water-phosphate slurries containing various concentrations of solid particles. The influence of particle size, particle size distribution and concentration on the mixture's transport velocity and viscosity are examined.

Climate change sets biofuel demand

In the attempt to reduce CO2 emissions, biofuels are playing an increasingly important role. But the aggressive acids, high temperatures, high viscous media and strict legislation involved impose significant demands on components. KSB's Michael Bauer looks at the pump technology that is helping develop this growing sector.

The potential of gas shale

Robert McIlvaine and Ann James of McIlvaine Company show how extracting gas from shale deposits has become ever more economical, and discuss how pumps can play a role in this increasingly important form of energy, looking at a selection of important wells across the U.S.

Back to basics with centrifugal pumps

While World Pumps publishes many technical features, it is always good to go back to basics. Courtesy of the Waterworld museum in the UK, we present some brief insights into the development of centrifugal submersible pumps, with some recnet examples.

What to do with an old AC drive

Many of the AC drives used by the water and wastewater industry are approaching 20 years old. Even with careful maintenance there comes a point when the decision has to be taken whether to replace, upgrade or retrofit? Here we define the choices available.

Special systems for coating cars

Reinhard Kurtz and Katrine Abraham discuss automotive industry and other surface treatment applications. They examine the issues and look at how to design pumps and seals to handle the fluids concerned. Their simple solutions allow smooth process flows without disturbances and costly downtime.

Developments in metering diaphragms

Modern metering pumps are generally environmentally friendly and efficient. To ensure reliability and safety when handling hazardous media, hermetically-sealed equipment uses intelligent break-sensing and separating diaphragms, plus reliable failure recognition. A Bubb and B Freissler of ProMinent report.

Dry solution success in India

Environmental benefits of dry vacuum pumping, particularly for reducing pollution and operating costs, have long been appreciated and progressive vacuum users are learning how best to exploit experiences in India.

Constant checking keeps systems safe

As equipment and machinery becomes more complex and automated, the need to have a properly structured and funded maintenance strategy is more important than ever. A recently released white paper provides engineers with advice and guidence on the condition monitoring of rolling bearings.

Pump monitoring: unusual incidents

Condition monitoring tests are beneficial in improving both the operation and maintenance of pumping systems. Here, Ray Beebe of Monash University uses a slurry pump case study to illustrate the value of basic head-flow tests for a system where restricted access made conventional flow measeurements difficult.

Making optimum pump decisions

In the USA, the McIlvaine Company has developed a classification tool to aid decision-making processes, such as the selection of an appropriate pump for a particular application. Robert McIlvaine explains the theoretical concepts behind the system and illustrates its benefits with some practical examples.

Condition monitoring of multiphase pumps

Gerhard Rohlfing discusses the current state of conditioning examination in multiphase twin screw pump systems and how it can increase pump life. He also looks at some examples in the oil and gas industry where, done correctly, it has been found to improve efficiency.

LCC approach for big motor-driven systems savings

ABB's Jukka Tolvanen introduces life cycle cost analysis and shows how efficient motors and AC drives can often be used to minimise lifetime costs, especially in high usage pump and fan systems

Choosing a ball valve that lowers emissions

Regulatory agencies in both the US and Europe are tightening controls on fugitive emissions, such as equipment leaks, as opposed to point-source emissions from reactor vents or boiler exhaust stacks. Michael Adkins and Pete Ehlers, both of Swagelok, explain how choosing the right ball valve can keep you in compliance.

Protecting an inaccessible motor

For many applications, VSD motors are set far away from the pumps they run, which can cause bearing damage and motor failure. Steve Hughes, managing director of REO, explains how new filter technology can protect these hidden motors.

Fire fighting pumps: Reducing the risk of a serious fire

Fires in Queensland and New South Wales in August are not unheard of, but are often a forewarning of more serious fires to come once the heat of summer arrives. This makes it all the more important for firefighters and homwowners to ensure they have the best pump equipment to help fight the flames.

Dynamic delivery for home heating

Central heating manufacturers are developing environmentally-conscious technologies which can effectively distribute heat, while saving energy. Phil Marris discusses the technological developments in the heating industry which have made the use of heat pumps with powerful, compact radiators a reality.

Pump selection: A real example

Choosing the most appropriate and cost-effective centrifugal pump for a given duty requires strict adherance to a thorough selection process, as Eduardo Larralde and Rafael Ocampo discussed in the first article of this two-part series. Here they demonstrate the application of the selection procedure in practice with a real-life example.

Creating a common company culture

In June 2008, Ole Weiner was appointed President and CEO of AxFlow Holding AB. In this article we look at how he has maintained Axflow's growth during a period when conditions throughout all areas of the processing industry have deteriorated and continue to give rise for concern.

Flexible concepts in building automation

The advantages of the 'intelligent building' are the increase of user comfort as well as the reduction of operating costs. existing pump technology, such as that found in heating and air-conditioning, can contribute to this. Here we examine a flexible concept with which electronic pumps can be integrated into different building automation systems.

Bypass pumping considerations

With significant state funding being allocated for wastewater and drinking infrastructure improvements throughout the US, there will be a need to temporarily divery water flows during construction improvements. With the demand for bypass pumping systems set to grow, Del Ritz discusses how to implement a successful bypass operation.

Multiphase help for gas reduction

Flaring and venting of greenhouse gases during oil production contribute considerably to climate change. Most oil producing countries are preparing for the end of flaring. Hans Juergen Schoener looks at the contribution of multiphase pumping to the protection of climate and environment.

Ending harmonic distortion

This article looks at methods used to reduce the harmonic distortion produced by variable speed drives, including reactors, multi-pulse solutions and passive harmonic filters. It also refutes some of the criticisms of low harmonic drives made by some commentators.

Redesigning a hot water system

The design and operation of hot water systems typically appear to be straightforward. However, particularly in large buildings with many users, inexpert system design can result in unsatisfactory supply issues, as this article illustrates using a real-life example of a large hospital.

Coping with steam plant demand

Electrical power generation plants using various types of steam cycle place high demands on the pumps that feed and look after the steam generators. To a large extent, the pump types vary with the power plant type and come in different configurations. James Hunt provides a basic guide to pumps in power generation.

Improving open canned systems

The results of a study on the hydraulic performance of open-bottom canned pump intakes should aid engineers and pump users to design these systems with reduced velocity fluctuations and undesirable flow rotation. This article provides the details.

Keeping track of bearing wear

Effective monitoring of thrust bearing wear is a crucial factor in preventing pump and impeller damage. This article describes the techniques available for monitoring thrust bearings on boiler feed equipment, and explains hot the technology can be successfully implemented and commissioned.

Applying NPSH to metering pumps

Net positive suction head calculations are routinely used to establish whether centrifugal pumps will operate satisfactorily in a given process. However, extending the NPSH concept to metering pumps presents a number of difficulties, as this article explains.

Twenty five year' dry pumping

A look at the important development of the dry, oil-free vacuum pump, which solved the back streaming problems that had previously plagued major industry sectors for years - metallurgy, vacuum drying and semiconductor manufacture amoung them.

Designing high-power sewage water pumps

To develop a sewage water pump for extreme operating conditions and high power consumption requires numerical simulation, advanced prototype manufacturing and experimental verification of design data. This article describes the process.

Dry vacuum gains for processing

Environmentally friendly dry vacuum pumps have great energy saving possibilities and have the potential for the lowest cost of ownership in chemical and biofuel processes. This article explains the benefits.

VSD - control om simulated systems

To reduce the energy consumption of a parallel pumping system the whole pumping process can its components must be monitored. Simulated environments can be used in finding energy saving potential. This article looks at the different technical solutions which could help realise this, such as VSD installment or changing speed adjustment methods.

Less resistance to energy efficiency

There are many ways to increase the efficiency of pump. Here, lew Beck at Oconee Nuclear Station discusses two of them: firstly the use of ceramic type coatings applied to pump intervals such as the impeller and casing, and secondly through the renewal od original filts and tolerances.

Making centrifugal pump more reliable

Decisions and actions taken during the specifying, commissioning, operation and maintenance of centrifugal pumps can all affect reliability. This is an increasingly important issue with the growing emphasis on efficiency and cost reduction. Trinath Sahoo of Indian Oil Corp provides the details.

Pumping gas from field to application needs large machines

Gas turbocompressors are essential for gas pumping, transport and other duties in expanding petrochemical, gas and process industry sectors worldwide. James Hunt explains the different uses and demands for gas turbocompressors, and also what is needed by way of materials and construction for optimum results.

Get it right first time - reduce TCO

Gunther A Meyer and Wolfgang Leiber of Allweiler AG discuss the many ways in which pump operators can influence the service life and efficiency of the pumps in their charge, and therby reduce total costs. Factors affecting both rotodynamic and positive displacement pumps are considered.

Increasing reliability using FEM-CFD

A consideration of coupled FEM-CFD simulations as the potential basis for a condition monitoring tool to improve the lifetime and performance of boiler feed water pumps in power plants.

Mixture type dictates pump choice

A consideration of the variety of factors which determine the selection of centrifugal pumps for applications involving the transport of solid-liquid mixtures. The influence of wear on the operating parameters of these pumps is also examined.

Two approaches to capacity control

Pump capacity is mainly controlled by means of throttle valves or by varying the rotational speed. This article considers the advantages and diadvantages of both methods and whether it is always useful to use speed regulation.

Mechanical seal selection for VSDs

Variable-frequency electronic drives are becoming common place for many applications. However, if operating conditions change, these drives can also adversely affect some pump components. This article looks at the changes which might occur and argues that they must be taken into consiferation when selecting the right seal.

Rubber cuts sewage pumping cost

A description of an experiment involving pumping sand-laden wastewater at a German sewage plant. The results; a rubberised pump won an endurance test against pumps made from conventional hard chromium-alloy cast iron, and pumps using ceramic coatings.

Tubular case pumps for desalination

Bryan Orchard discusses the use of tubular casing water feed pumps in KBS's Frankenthal plant, Germany.

Reducing greenhouse emissions at origin

Sabine Sulzer of Sulzer Pumps and Markus Duss of Sulzer Chemtech discuss their solutions to carbon capture challenges, using Sulzer's experience of designing and manufacturing related proprietary equipment.

Intelligent drives on the rise again

A look at some of the functionality and benefits of variable speed drives and how the total life cycle cost of a VSD controlled pumping system can be reduced significantly.

The industry's global career focus

Chris Rowe discusses how recent developments, including the current downturn, could revolusionise how professional engineers find careers.

Centrifugal pump selection process

In the first of two articles, Eduardo Larralde and Rafael Ocampo demonstrate the importance of matching centrifugal pump characteristics with the correct application in order to ensure optimal energy use and maximun life span.

Seal and bearing care extends life

How care with bearing and seal technology can extend pump life and prevent premature system failure

Optimization of interacting pumps

Valérie Bischof, Prof. Bernd Stoffel and Prof. Peter Pelz of Technische Universität Darmstadt consider whether hydrodynamic interactions in pumping systems with multiple pumps can be harnessed to optimize the performance of the whole system.

Air motor drives in the paper industry

Trixy Schmidt and Dagmar Hierl discuss the advantages of the stainless steel series 67 air vane motor which meets the strict criteria for use in the preparation of paper with the added benefit of high performance density.

Transitioning to a Renewable Energy Future

This white paper provides a rationale for effective governmental renewable energy policies worldwide.

Demand for BCPs in the Middle East

James Hunt talks to one of the four manufacturers in the world able to supply very high-pressure wet stator motor boiler circulation pumps for sub- and super-critical boilers in large power generation plant.

Meeting oil & gas project demands

Bryan Orchard talks to UK pump manufacturer Amarinth about the valuable source of business the Middle East's oil, gas and petrochemical industries are providing pump companies with.

Water cooling is big business

A look at some of the design considerations and solutions which KSB has developed for cooling duties within the power generation, refining and petrochemical industries.

Removing bacteria from intake water

With desalination playing an important role in the provision of water, this article looks at the chlorine-based disinfection systems developed by Grundfos.

Power station pump selection: part 1

The importance of selecting the optimal configuration and drive option for condensate extraction pumps when designing a new power plant.

Power station pump selection: part 2

A discussion on the selection of the optimized pump configuration and drive option for the boiler feed pumps to be installed at new power stations.

Diamond seal faces - the benefits

How diamond sliding surface technology can benefit mechanical seal applications and improve pump performance.

Upturn in refinery and desal exports

How the oil + gas and desalination sectors in the Middle East are heading towards a major growth after a slowdown over the past two years.

Pumps as turbines for water industry

An examination of the benefits of running pumps as turbines for an efficient method of generating power, recovering energy and contributing to savings.

Blade adjustment cuts energy costs

How using pumps with an adjustable pitch angle of propeller blades can lead to cost savings.

Modelling flows for efficiency gains

The use of high-speed camera techniques to investigate fluid flows in multiphase pumps designed for process industry applications.

Ingress Protection code explained

A look at the code devised to classify the degrees of protection for an enclosure from dust, water and impacy.

Open and closed water pipelines

The different risks fluids present while being conveyed through open and closed water piplelines.

Mixing systems for high viscosities

How the factors which influence the flow behaviour in submersible mixers should help to improve the design of mixing ponds for sewage sludges.

Magnet drives cut maintenance costs

The effect of replacing stuffing box packed pumps with magnet drive types in a German bitumen plant.

Designing made to measure reliability in a seawater injection pump

A description of the development of a seawater injection pump for a major Middle East oil producer.

Cavitation control in centrifugal pumps

An examination of the various causes of cavitation in centrifugal pumps, describing the pattern of damage each inflicts and the different methods to prevent and cure them.

Eastern power generation market shows promise

A look at how the demands of a growing population in Eastern Asia is affecting the power generation market

Great efficiency in nuclear power stations

Increasing pump efficiency in nuclear power stations through ceramic coatings and renewal of origninal fits and tolerances.

Guide to pumps in power stations

A look at the various pumps for steam generators in electrical power generation plants.

Middle East Market Overview 1

Pump opportunities in the Middle East in the desalination and refinery markets.

Correct bearing and grease selection

How to choose the most appropriate bearings, grease and re-lubrication equipment.