500X PN10~PN25 pressure relief and pressure holding valve can release the pressure in the water supply pipe that exceeds the safety setting value of the pilot valve, and maintain the pressure in the pipe below a safety setting value to prevent high pressure or surge in the pipe from damaging the pipeline or equipment. It can be used for pressure relief in the fire test circulation system of high-rise buildings to prevent excessive water pressure from causing system hazards. Pressure holding valve: It can maintain the water supply pressure upstream of the main valve above a certain setting value to protect the pressure of the water supply area upstream of the main valve.
