Model AFY And AFQ Safety Valve
The hydraulic or air drive safety valve, as executive part of safety system on well, can classify both parts of preparation valve and driver. High pressure oil enters the empty chamber of the driver and then press the bottom spring as to open the valve, if the pressure exceed the bearing ability of wellhead assembly, by the sigh part through the sensor, the control mechanism unload the pressure out of the oil cylinder, and the spring pushes the valve stem to close the valve and wellhead assembly so as to ensure equipment safe.
