Structural Features of Forged Steel Trunnion Ball Valve

The followings are the structural features of forged steel trunnion ball valve:

 

1. It is convenient for operation when opening or closing valve;

2. Body is supported by stationary shaft, eliminating overlarge torque caused by large sealing load because of inlet pressure pushing the sealing seat of body;

3. Surface finish of body surface is like mirror surface, inset with PTFE metal axle sleeve have good self-lubrication. Even under the largest operating pressure, the valve will not have overlarge torque, safe and reliable;

4. There is preload at the back of valve seat, imposed by spring, using piston principle to realize sealing. The left and right seat cuts off or connects media, cooperating with body;

5. A decompression valve is installed inside body to air exhaustion and drain plug at the bottom of body is used to eliminate deposited dirt; 

6. When media remained inside valve boost unusually for temperature rising, inlet and outlet seat separate from body and relieve pressure automatically;

7. Stem and body use rubber, O-ring and graphite gasket as sealing materials so that valve can realize safe and reliable sealing under different working conditions;

8. Stem and seat are equipped with auxiliary sealing device to assist sealing under unforeseen circumstance;

9. Fire design conforms to AIP 607 standard.