D-500X water holding relief pressure valve

Description

500X water holding relief pressure valve

 

500X Principle

water holding relief pressure valve When the pressure relief valve is adjusted to the pressure relief state, water flows to the outlet through the needle valve, main valve control room, ball valve A, pressure relief/pressure sustaining pilot valve, and ball valve B. At this time, the main valve is in the On state. When the inlet pressure exceeds the safety value set by the pressure relief/pressure sustaining pilot valve, the pressure relief pilot valve will automatically open, and part of the water will be released through the ball valve C to relieve the pressure of the pipeline. When the pressure returns to a safe value, the pressure relief valve will automatically close. When used as a pressure relief valve, each ball valve is normally open. As a pressure sustaining valve: When the pressure relief/pressure sustaining pilot valve is adjusted to the pressure maintaining state, as long as the main valve inlet water pressure is lower than the pilot valve set value, the pilot valve will be closed. The main control chamber is boosted and the main valve is closed. When the upstream water supply pressure of the main valve exceeds the set pressure of the pilot valve, the pressure-maintaining pilot valve can be opened, the water in the control room is discharged to the outlet through the ball valve, and the main pressure-reducing valve in the control room is opened to start water supply, that is, the upstream water pressure is maintained. When used as a pressure sustaining valve, the ball valve C is normally closed or replaced with a plug.

Characteristic

water holding relief pressure valve body adopts full channel streamline design with small fluid resistance and large flow. Can do pressure relief valve and the valve can be used as a pressure valve, when doing relief valve in the feed pipe can be more than pilot valve value for pressure release, and maintain the pressure in pipe under the TVC, in order to prevent the excessively high hydraulic pressure system risk; When holding the pressure valve, the upstream water supply pressure of the main valve can be maintained above a certain set value, only upstream pressure is higher than the set value, to supply water downstream to ensure the upstream water supply pressure of the main valve.