The reasons for sealing failure of pneumatic eccentric hemisphere valve are as follows:
If there is an interference fit between the ball and the valve seat of the pneumatic eccentric hemisphere valve, they will interfere with each other during operation. In addition, the external force of some media will easily damage the sealing of the valve.
Pneumatic eccentric hemisphere valve has been used for a long time, and its valve seat will be slowly squeezed and deformed in the process of medium transmission. In other words, the valve seat has displacement relative to the valve body, and the generation of clearance is one of the reasons for the sealing failure of pneumatic eccentric hemisphere valve.
