Set up in 1995, Tonglu Valves Manufactring Co.,Ltd. is one of the leading China relief valve manufacturer and supplier in Yongjia County of Zhejiang Province. We manufacture all products strictly conforming to the API, JIS, ANSI, BS, GB, NF and DIN standards. Our oem relief valves are available to users on request and are used for municipal works, petroleum, chemical industry, power station, metallurgy, national defense, and scientific research fields.

Advantages and purpose There isnt water hammer. The sensitivity is high. Reasonably be controlled by the hydraulic pressure. Can use for long time. For reliefing the pressure of the production systems of the mining enterprises and fire systems of the high buildings in, order to prevent the system failure caused by the too high hydraulic pressure. Can keep the water supply upper pressure of the main valve in a preset pressure to, ensure the pressure of upper supply zone of the main valve.
Standard and regulation
1. Flange connection dimension: GB/T 17241.6-1998, GB/T 9113.1-2000
2. Nominal pressure: PN0.6MPa, PN1.0MPa, PN1.6MPa, PN2.5MPa
3. Nominal diameter: Diaphragm type DN20450mm, Piston type DN500900mm
4. Suitable medium: Water
5. Suitable temperature: ≤80
6. Inspection and test: GB/T 13927, API598
7. Body material: Cast iron, Ductile cast iron, Carbon Steel, Stainless steel

500X Pressure Relief or Sustaining Valve instantly opens when the pressure in the pipeline exceeds the preset safe level, thus relieving excessive pressure from the pipeline. When the pressure returns to normal, the valve closes slowly, at an adjustable speed. The valve also can be used to sustain upstream pressure to a preset pressure value.
Design Standard: A) Basic Design: ANSI B16.5, API 526 B) Test: API 527 2) Products Range: A) Size: 1/4" ~ 12" B) Rating: ANSI 150Lb ~ 2500Lb C) Body materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel 3) Application: Oil & gas processing, refinery, chemical, petrochemical, power plant Packing: Wooden case We can supply a wide range of butterfly valves, gate valves, globe valves, check valves, ball valves, relief valves, Strainers, hydraulic control valves, and pressure reducing valves. Our YOY Valve Group is famous for our safety valves in China.HS Code: 84814000 Trademark: YOYStandard: DIN, BS, ANSI, ISO, JIS, GB

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