Product overview

500X pressure relief/holding valve is composed of main valve, pilot valve, needle valve, ball valve, micro filter and pressure gauge, hydraulic control pipe system. The use of hydraulic automatic operation, that can be used as a pressure relief valve can also be used as a holding valve. When the pressure relief valve is used, it can maintain the pressure of the water supply circuit below the set safety value and maintain the upstream water supply pressure of the main valve o. Its working principle, when the pilot valve is adjusted to the pressure relief state, the water flows to the outlet through the needle valve, the main valve control room, ball valve A, pilot valve and ball valve B, and the main valve is open at this time. When the inlet pressure exceeds the safety value set by the 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 is restored to a safe value, the pressure relief valve is automatically closed. When the pressure relief valve is used, the ball valves are normally open. When the pilot valve is normally open. When the pilot valve is adjusted to the pressure holding state, the pilot valve will be closed as long as the inlet water pressure of the main valve is lower than the set value of the pilot valve. The main control is quite boost, the main valve is closed. When the upstream water supply pressure of the main valve exceeds the pilot valve and is discharged to the outlet, the control room will open the pressure main valve and start water supply, that is, the upstream water pressure is maintained. When used as a holding valve, ball valve C is normally closed or replaced with a plug. This product utilizes hydraulic self-control. No other devices and energy, easy maintenance, a valve multi-use. Widely used in high-rise buildings, living quarters and other water supply pipe network system and urban water supply project.

 

 

 

Installation Schematic

 

 

 

Main connection dimensions