1500XPressure relief valve, 500XPressure holding valve overview

500XPressure relief/Pressure holding valves are mainly used in fire or other water supply systems to prevent system overpressure or maintain the pressure of the fire water supply system. After the fire pump is turned off, the impact of water hammer can be reduced. Also used for water hammer devices in large-scale water supply systems. And a clean filter screen is installed at the inlet of the valve control system, which utilizes fluid characteristics to prevent suspended particles with high density and diameter from entering the control system, ensuring smooth system circulation and safe and reliable operation of the valve. The system operates smoothly, has high intensity, and has a long service life.

II500XPressure relief valve, 500XStructural characteristics and applications of pressure holding valves

500XPressure relief/The pressure holding valve consists of a main valve and a pressure relief valve/The hydraulic control connecting system consists of a pressure holding pilot valve needle valve, ball valve, micro filter, and pressure gauge. By utilizing hydraulic automatic operation, it can be used as both a pressure relief valve and a pressure holding valve. When used as a pressure relief valve, it can maintain the water supply pressure below the set safe value; Used as a pressure holding valve, it can maintain the upstream water pressure of the main valve above the set value and maintain the upstream water supply pressure of the main valve.
This product utilizes hydraulic self control, does not require other devices or energy, is easy to maintain, and has multiple uses with one valve.
This series of valve products is widely used in water supply network systems such as high-rise buildings and living areas, as well as urban water supply projects.

III500XPressure relief valve, 500XWorking principle of pressure holding valve

1Make a pressure relief valve: when releasing pressure/When the pressure holding pilot valve is adjusted to the relief state, water passes through the needle valve, main valve control room, and ball valveARelieve pressure/Pressure holding pilot valve, ball valveBFlowing towards the outlet, the main valve is currently in the open state. When the inlet pressure exceeds the relief pressure/When the safety value of the pressure relief valve is set, the pressure relief valve will automatically open through the ball valveCRelease some water to relieve pressure in the pipeline. When the pressure returns to a safe value, the pressure relief valve automatically closes. When making a pressure relief valve, all ball valves are normally open.
2Operating a pressure holding valve: When releasing pressure/When the pressure holding pilot valve is adjusted to the pressure holding state, as long as the inlet water pressure of the main valve is lower than the set value of the pilot valve, the pilot valve will close. The main control room is pressurized 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 holding pilot valve can be opened. The water in the control room is discharged to the outlet through the ball valve, and the pressure reducing main valve in the control room opens to start water supply, which maintains the upstream water pressure. When used as a pressure holding valve, ball valveCNormally closed or replaced with a plug.

4500XPressure relief valve, 500XMain technical parameters of pressure holding valve

5500XPressure relief valve, 500XMain component materials of pressure holding valve

VI500XPressure relief valve, 500XInstallation diagram of pressure holding valve

7500XPressure relief valve, 500XMain dimensions of pressure holding valve