500X pressure relief valve

1. Structure and characteristics

When used as a pressure relief valve, it can maintain the pressure of the water supply line below the set safe value and maintain the water supply pressure upstream of the main valve. Its working principle is that 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, the ball valve A, the pilot valve, and the ball valve B. At this time, the main valve is in the open state. 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 returns to a safe value, the pressure relief valve automatically closes. When used as a pressure relief valve, each ball valve is normally open. When the pilot valve is adjusted to a pressure-holding state, as long as the main valve inlet water pressure is lower than the pilot valve setting value, the pilot valve will be closed. The main control room is pressurized and the main valve is closed. When the water supply pressure upstream of the main valve exceeds the pilot valve and is discharged to the outlet, the control room opens the pressure main valve to start water supply, that is, the upstream water pressure is maintained. When used as a pressure holding valve, the ball valve C is normally closed or replaced with a plug. This product uses hydraulic self-control, does not require other devices and energy, is easy to maintain, and has multiple uses with one valve. It is widely used in high-rise buildings, living quarters and other water supply pipe network systems and urban water supply projects.

2. Material of parts