Cast Steel Metal to Metal Seat Trunnion Ball Valve (Q347H)

Metal to Metal Seat Trunnion Ball ValveHigh Temperature ServiceGeneral soft seat ball valve working temperatureis limited uo to 400° F, but metal-seat ball valves are guaranteed for a maximum service temperature of 800° F. Low Pressure Reliable SealingNIPO metal-seat ball valves adopt seat spring structure, which can push upstream seat tightly against the ball surface creating a reliable sealing even if extremely low pressurePressure TestMetal-seat ball valves maximum allowable seatLeakage: Air: ANSI/FC 170-2 CLASS VAbsolute Fire Safe GuaranteeMetal-to-metal contact is designed between ball and seat, where is unconditional fire safe function. Flexible graphite gasket can prevent fluid leakage from between body & seat or body & bonnet even if high temperature environments to reach fire-safe purpose. In addition, other sealing components such as stem packing can also reach fire-safe function and prevent external leakage. So all parts of valve will not be damaged by high temperature service. Blow-out Proof Stem & Anti-Static DeviceAs general ball valves, metal-seated ball valves are provided with blow-out proof stem &anti-static device.