Product Name: Hydraulic Water Pressure Relief Valve Material: Cast Iron Structure: Diaphragm Connection: Flange Temperature: Ordinary Temperature Certification: ISO, CE Media: Water Body: Ductile Iron, Stainless Steel Trim: Stainless Steel Diaphgram: Nylon+EPDM/Viton Seat: Ss/ Bronze Seal Rings: NBR/EPDM/Viton Trademark: Walter Transport Package: Bubble Bags and Wooden Case Origin: Suzhou, Jiangsu HS Code: 8481801090 Product Description Pressure Relief ValvePressure Sustaining/Relief Valveis 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.1. Body/Bonnet: GGG502. Spring: SS3043. Stem: SS /Bronze4. Disc Retainer: DI/SS/Bronze5. Seat: SS/Brass/Bronze6. Seal Rings: NBR/EPDM/Viton7. Pilot: Stainless Steel or Brass8. Pipe or Tubes: Coppe or Stainless Steel9. Working Pressure: PN10/16/2510. Connection: Flanged acc. To EN1092.2, ISO 7005-2, ANSI/JIS/ AS212911. Epoxy Resin Coated to 300 microns inside &outside12. With Anti-cavitation (Trim) SolutionWALTER-FSV Company professional produce and supply kinds of Automatic Hydraulic Control Valves, Float Control Valve, Pressure Reducing Valve, Slow Check Valve, Pressure Relief Valve, Soleniod Control Valve.WALTER-FSV Company accept OEM /ODM orders. and welcome for your calling or emails.