Flange safety relief valve

A Conventional Safety Relief Valve (PRV) uses a spring to keep the valve closed until the process nears the set pressure. The spring force pushes the valve’s disc against the nozzle seat keeping the valve closed. Process pressure exerts an opposing force on the disc. When the process pressure force on the disc overcomes the opposing spring force, the disc lifts and the valve begins to relieve pressure. Performance The allowable tolerance of the set pressure: ≤±3% of the set pressure Over pressure: ≤±10% of the set pressure Blowdown: ≤±10% of the set pressure Tightness: the valve has good seat tightness conforms to API 527