When the ball valve is used, the valve rod leakage often occurs. It is necessary to find the reason for the leakage of the valve stem according to the specific conditions, so as to eliminate the failure and ensure the ball valve to be used normally. If the pressure of the pipe is too high and the ball valve stem leakage is caused by the pressure range of the ball valve, the ball valve must be replaced, and the ball valve is selected to meet the pressure of the pipe to ensure the normal operation of the pipe and the related equipment.

Other causes and elimination of valve stem leakage:

1. The cover is skewed or not pressed.

2. Insufficient fillers

3, filler failure

The following methods to exclude the leakage of the valve stem:

1. Re uniform locking packing gland

2. Adding filler

3. Replacement of new fillers

Special remind: ball valve installed electric actuators or pneumatic actuators, so that the length of the ball valve stem to meet the needs of the actuator length. The ball valve stem is too short, which easily causes the valve stem to fall off the connecting part of the actuator, causing the ball valve not to act. The valve stem is too long to hold the stem against the actuator, causing the torque to increase, the ball valve switch is not flexible; it also causes the stem to push down the valve core, causes the ball valve core to offset, so that the ball valve is closed and the leakage is formed. Therefore, when installing the ball valve, we should pay attention to the above matters and avoid unnecessary losses.