00159635 burkert order number 2000 type caliber DN25 accessory repair kit PTFE sealHow to solve the common fault description of vacuum diaphragm valve

How to solve the common faults of vacuum diaphragm valves

Possible failure

Handwheel operation is not flexible

Cause 1 stem bending 2 thread damage

Elimination method 1 Replace the valve stem 2 Trim the thread and add lubricant

Pneumatic diaphragm valve can not automatically open and close

Cause 1 The air supply pressure is too low 2 The spring top tightening force is too large 3 The rubber diaphragm is damaged

Elimination method 1 Increase the air supply pressure 2 Reduce the spring top force 3 Replace the diaphragm

Leakage at the junction of the valve body and the bonnet

Cause 1 The connecting bolt is loose. 2 The rubber layer inside the valve is broken.

Elimination method 1 tightening the connecting bolt 2 replacing the valve body