What Is The Trunnion On A Ball Valve?

The axon on the valve is the core part of the fixed sphere, which realizes the valve opening and closing operation. It usually refers to a short connecting rod or fixed shaft mounted at the bottom or top of the sphere to support the sphere and transmit power by working with the valve body. These are as follows:
The trunnion plays the role of supporting the sphere in the valve and realizing the rotation of the sphere. In a the trunnion ball valve valve, the ball is fixed by the trunnion (short connecting rod) and a knuckle at the top. The trunnion is connected to the ball, providing a stable support point for the ball. Since the ball is securely held in place by an ear shaft, it cannot be replaced by fluid pressure unless its 90-degree rotation, which ensures the valve's stability and reliability in high pressure and harsh working conditions.
The shaft neck is designed so that the ball valve requires less torque to open and close, so a smaller actuator can be used. At the same time, the trunnion ball valve can reduce friction between the ball and seal, which is helpful to prolong the valve service life. In addition, the valve seat of the interceptor ball valve is usually loaded with a spring mechanism to ensure that the valve remains sealed when the seat inevitably begins to wear out.