Flanged globe type pressure relief valve (Fire pump relief valve) is used in the discharge of fire pump with flanged connection. It automatically relieves excessive pressure, so to maintain constant pressure. It allows the fire pump to be stopped without causing surging.
A Pressure Relief Valve is defined by NFPA 20 (3.3. 67.5 Relief Valve) as “A device that allows the diversion of liquid to limit excess pressure in a system.” In general, a PRV is a safety device, designed to protect a pressurized system during an overpressured event.
The pressure relief valve (500X) is a hydraulic control valve, mainly used in fire protection or other water supply systems to prevent system overpressure and maintain the pressure of the fire water supply system. When the pressure in the water supply pipeline exceeds the set pressure of the pressure relief valve, the pressure relief valve will release the pressure in time to protect the safety of the pipeline.
A filter must be installed before the 500X pressure relief valve and the pressure holding valve. When adjusting, the screw on the pilot valve should be withdrawn, the water pump should be started to discharge from the pressure relief valve, and the adjusting screw should be gradually screwed in to gradually increase the pressure until the required set pressure is reached. Tighten the nut after adjustment.
500X pressure relief valve is a device used in water supply pipe network systems and urban water supply projects in high-rise buildings and living areas. The device consists of a main valve, pilot valve, needle valve, ball valve, micro filter and pressure gauge to form a hydraulic control takeover system. It uses hydraulic automatic operation and can be used as a pressure relief valve or a pressure holding valve.
The 500X pressure relief/pressure holding valve consists of a main valve, a pressure relief/pressure holding pilot needle valve, a ball valve, a micro filter and a pressure gauge to form a hydraulic control takeover system. It can be used as a pressure relief valve or a pressure holding valve by hydraulic automatic operation. When used as a pressure relief valve, it can maintain the water supply line pressure below the set safety value; when 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.
500X pressure relief and pressure sustaining valve is mainly used to adjust the medium flow, pressure, temperature, liquid level and other process parameters in the field of industrial automation process control. According to the control signal in the automation system, the valve opening is automatically adjusted to achieve the adjustment of medium flow, pressure, temperature and liquid level.
A Pressure Reducing Valve (PRV) is an Automatic Control Valve designed to reduce a higher unregulated inlet pressure to a constant, reduced downstream (outlet) pressure regardless of variations in demand and/or upstream (inlet) water pressure.
