From the previous several articles, we know the cause of external leakage. And this passage I will introduce the cause analysis of valve internal leakage.

Leakage inside the valve. In general, the valve leakage occurs in three parts:

First, the contact between the opening and closing parts and the sealing surface of the valve seat leakage occurs;

Internal leakage occurs at the joint of valve body and bonnet ball valve;

Third, the valve close position adjustment is not in place, the occurrence of internal leakage.

Our valve is small torque, we can save effort in opening and closing. It’s convenient to opening. ZJCLV valve, the best ball valve!