For the past 15 years, pilot-operated safety relief valves (POSRVs ... the relieving equipment and to prevent chatter during lower flow-relieving situations. A single modulating POSRV can adjust ...

Lee Company’s new High Pressure 500 Pilot Operated Chek is the latest addition to Lee’s line of miniature check valves. This valve acts like a normal check valve until pressure is applied to the pilot ...