Mon, 09/22/2014 - 00:00

HOUSTON (Sept. 22, 2014) – NOV Mono has delivered a turnkey project to provide an extra level of protection for a major water and waste treatment plant in Pembrokeshire, Wales. The project centers on an EZstripTM progressing cavity pump which is now being used on sewage transfer duties to ensure that the plant can guarantee the quality of the treated sewage under any flow conditions. Powered by a 4kW motor and operating at a duty speed of 226 rpm, the EZstrip pump draws sewage from the center of the final settlement tank at Dwr Cymru’s Crymych treatment plant. It pumps the sewage back up to the head of the treatment system, from where it returns back through the filter bed to the final tank. This ensures that the plant’s biological filters do not dry out and remain effective, even in low flow conditions. This, in turn, helps to maintain the quality of the final sewage within the required boundaries at all times. Mono was approached because of its ability to provide a full turnkey package that covered all the stages, from initial site survey, design and manufacture to full mechanical and electrical installation. Working closely with the project’s civil contractor, Mono installed the pump, suction pipe, rising main, control panel, overpressure and high-temperature devices and completed the final testing and commissioning. Both the electrical and mechanical work were handled by Mono, which has since completed a similar project at Dwr Cymru’s Lamphey treatment plant. The progressing cavity pump at the center of the Crymych project features Mono’s EZstrip design which allows it to be maintained in place. This provides a quick and easy way to disassemble, de-rag and maintain the pump without the need to disconnect suction and discharge pipework. This also reduces a typical day-long maintenance operation to just 30 minutes. NOV Mono is a division of National Oilwell Varco. It comprises a group of specialist companies offering progressing cavity pumps, artificial lift systems, industrial mixers, heat exchangers, grinders, screens and aftermarket replacement parts and services, across a broad spectrum of industrial sectors, including water and wastewater, oil and gas, chemical, pulp and paper, food and beverage, and agriculture.