KSB develops new in-line pump series for building services

KSB will showcase a new type series of fully integrated in-line water pumps for building service applications at this year’s ISH trade fair in Frankfurt am Main, Germany from 13–17 March 2023.

The new EtaLine Pro series are fully integrated in-line water pumps
The new EtaLine Pro series are fully integrated in-line water pumps - Image © KSB SE & Co KGaA.

The developers of the intelligent and highly efficient EtaLine Pro type series focused not only on extremely low energy consumption, but also on the economical use of materials.

By using a hydraulic system designed for high speeds, they were able to achieve a very compact design. With the significantly increased output per size, the new pumps require up to 44% less aluminium, 49% less grey cast iron and 68% less magnetic steel sheet, as well as 73% less copper, compared to conventional units.

The magnets used in the motors are classic ferrite magnets, so they do not contain any rare earths. The motor rating ranges from 0.8–2.6 kW.

With their wide voltage range of 380–480 volts at 50 or 60 Hz and international product certifications such as CE, UKCA and UR/UL, the pump sets can be used worldwide.

The new units offer a high degree of planning reliability, as they have several pump functions, such as dynamic control, sensorless control and multiple pump operation, as well as heat quantity measurement. These intelligent functions allow adjustments to be made to the operation or operating points even after the pumps have been installed. The pumps adjust their flow rate and head based on an algorithm, moving the operating point along a programmed control curve. Thanks to various digital interfaces, integration into modern building management systems is possible without any problems.

With only five hydraulic system sizes, the very quietly operating close-coupled pumps cover a broad selection range. Their maximum flow rate is 63.6 cubic metres per hour with the maximum discharge head possible being 42.9 metres.

When designing the new type series, the developers paid particular attention to ease of service. Standardised mechanical seals and a reduced variety of components, combined with an extensive global service network, ensure rapid availability of spare parts when needed.

The pumps and the mechanical seals are designed for operating pressures up to 16 bar. As standard, the pumps are fitted with mechanical seals selected for a maximum operating temperature of 120°C, depending on the application and the fluid handled. A cathodic e-coating of the cast casings provides the necessary corrosion protection.