Mono claims pump maintenance breakthrough

Manchester, UK - Mono NOV has launched a  new pump design, which, it claims, reduces a day-long maintenance operation down to a 30-minute job. Declaring it "the biggest leap forward in progressing cavity (PC) pump design for 30 years", Mono said the EZstrip pump offers a quick way to disassemble, de-rag and maintain a PC pump in-situ.

The development followed a survey of wastewater industry customers, who identified ragging as an increasing problem, explains Simon Lambert, Mono’s general manager for Europe. This, he said, is primarily because more and more unsuitable items are finding their way into the sewers.

“Current options available to engineers are limited, time consuming and in some cases unsafe," said Lambert. “Once we addressed the ragging issue we realised the potential of this product to minimise the time and cost involved in every aspect of maintaining a PC pump."

Mono states that  the new pump can on average reduce the maintenance time needed to replace a rotor, stator, coupling rod and drive train by 95%. It can be installed into new plants or retrofitted into existing installations. No electrical disconnection is required and suction and discharge pipes remain untouched, the company adds.

The pump is also said to offer dry run protection and all operational parameters are unaffected. The model range has a capacity of up to 165m3/h and 12 bar pressure, and is available in either cast iron or stainless steel. WRAS compliant elastomers are used in the manufacture of the pump and a pre-assembled drive train, with two year warranty, is also available.