自动操作安全卸压阀 Safeset valves are self contained pilot operated safety relief valves, which use the system pressure to control the valve opening and closing. No other source of energy is required. A choice of Safeset pilot valves are available, including pop and modulating action to suit a variety of applications.Safeset valves conform to API 526 pilot operated pressure/temperature ranges and dimensions with multiple orifice areas contained within each valve body size.