Relief valve

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Size: DN20-DN800

Nominal Pressure: PN10/PN16/PN25

Operation Temperature: ≤80°C

Suitable Medium: Water


500 x relief valve by the main valve, pressure relief/holding pressure pilot valve, needle valve, ball valve, micro shape filter and pressure gauge of hydraulic control of system. Use of hydraulic automatic operation, can make the pressure release valve and can be used for holding pressure valve. As a pressure relief valve, it can maintain water supply way pressure under the TVC of set; For holding pressure valve, can maintain the main valve upstream water pressure above the set value, maintain the main valve upstream water supply pressure.

500 x relief valve using hydraulic control themselves, do not need other devices and energy, maintenance is simple, one valve is multi-purpose. 500 x relief valve is widely used in water supply network system of high-rise buildings, residential and urban water supply engineering.

1, A pressure relief valve: when the pressure relief/holding pressure pilot valve is adjusted for pressure condition, water through the needle valve, the main valve control room, ball valve, A pressure relief/holding pressure pilot valve, ball valve B of exports, at this time the main valve is fully open. When the inlet pressure exceeds the pressure relief/holding pressure pilot valve set TVC, pressure pilot valve will automatically open, channelled through ball valve C section water, make the line pressure. When the pressure recovery to TVC, pressure relief valve automatically shut down. As a pressure relief valve, ball valve normally open.

2, for holding pressure valve: when the pressure relief/holding pressure pilot valve adjustment of the state, as long as the main valve import water pressure is lower than the pilot valve set point, pilot valve is closed. The main control room booster, the main valve closed.

3, when the main valve upstream water supply pressure exceeds pilot valve set pressure, holding pressure pilot valve to open, the control room of water through the ball valve to the export, the control room main reducing valve open, began to water supply, that maintain the upstream water pressure. For holding pressure valve, ball valve normally closed C or substituted a plug.

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