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Last edited 08 Aug 2022
Double regulating valve
Energy Efficient Pumping Systems, a design guide (BG 12/2011), written by Chris Parsloe and published by BSRIA in 2011, suggests that a double regulating valve (DRV): ‘…enables manual regulation of flow rate. Once regulated, the valve can be locked in its set position and subsequently used for isolation. On re-opening, the valve will only open as far as its locked position.’
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