Pressure sustaining /relief Valve PN 25/16/10

Supplying various Control valve at lower prices and good quality,  pilots are also available to provide. Medium:  Water/Oil /Gas Temp: -41-220°C Design Standards: CJ/T 219 JB/T 10674 ,EN1074-5 BS EN1567 TEST STANDARD: GB/T 13927, ISO5208,EN12266-1 PRESSURE: PN10/16/25 ,ANSI CL125/150/300;JIS 10K/16K,AS TABLE D,TABLE E CONNECTION: FF,GB12221/EN 558-1/IS 5752 SERIS 1 FLANGE DRILING: EN1092-2,ISO7005-2,ANSI/JIS/AS2129            The Model 500 Pressure Sustaining/Relief Valve is a hydraulically operated, pilot-controlled, modulating valve designed to maintain constant upstream pressure within close limits. This valve can be used for pressure relief, pressure sustaining, back pressure, or unloading functions in a by-pass system.          In operation, the valve is actuated by line pressure through a pilot control system, opening fast to maintain steady line pressure but closing gradually to prevent surges. Operation is completely automatic and pressure settings may be easily changed by adjusting screw on top of the pilot.