Anti-static device is another basic and mandatory design for ball valve.

During the operation of valve, the constant friction between ball and soft seat will generate static electricity. The spark caused by static electricity may ignite the inflammable fluid inside the valve and cause a potential fire hazard.

To get rid of the hidden danger, an anti-static device is invented for ball valve. Like the picture shown below, the anti-static devices are located between ball and stem & stem and body, composed of a spring and a stainless steel ball, which make sure that all the metal parts of ball valve are grounded. In this way, the static charge could be transmitted from ball to stem, and then from stem to body and ground, to prevent any potential fire hazard caused by static charge inside the valve.

That is how an antistatic device works. We hope this article could help you better understand ball valve design. You could check our blog for more valve knowledge.