Cutting downtime with Mono transfer pump

A Thames Water sewage treatment works in London was experiencing too much downtime due to maintenance. A new pump was needed which could improve efficiency and reduce downtime without presenting difficulties during installation. The selected NOV Mono EZstrip progressive cavity pump has proven easy to dissemble, de-rag and maintain.

After seeing the benefits offered by NOV® Mono’s® EZstrip transfer pump at one of the company’s UK roadshows last summer, Thames Water chose to install one of these pumps to improve efficiency and reduce downtime at Beckton sewage treatment works in Greater London.  

Beckton sewage treatment works

The EZstrip progressing cavity (PC) pump, which has been mounted vertically, has been installed in a pump station to transfer returned sludge to the buffer tanks at a capacity of 90 m3/h and a delivery pressure of 4 bar.

Dave Rudman, maintenance team manager at Thames Water, said: “After seeing the EZstrip in action at one of Mono’s roadshows last summer, I decided to specify one for the site in Beckton. As well as the speed at which the rotor and stator can easily be replaced, the EZstrip could be mounted vertically, which was an added bonus due to the building’s restricted space. Since it was installed, the pump has been running smoothly – we are very happy with its performance. It was also a major advantage that Mono could manage the whole installation.”

Easy maintenance

Mono’s EZstrip PC pump is an extension of Mono’s Compact C range. The EZstrip has been specifically designed to provide a quick and easy way to disassemble, de-rag and maintain a PC pump, eliminating the costly maintenance and downtime that servicing can often cause. The chamber of the EZstrip pump has a two piece design which can be opened in less than one minute; the suction chamber and rotating parts can be de-ragged, and the chamber reassembled with a spanner and an Allen key. The whole operation takes less than two and a half minutes, depending on the severity of the rag blockage.  

The EZstrip PC pump can be installed into new plants or retrofitted into existing Mono Compact C installations. No electrical disconnection is required and suction and discharge pipes remain untouched when installing the pump in a horizontal position.  

The model range has a capacity of up to 165 m3/h and 12 bar pressure, and is available in either cast iron or stainless steel. A choice of rotor and stator materials are available, including WRAS compliant elastomers and a pre-assembled drive train, with a two year warranty.