Common faults and solutions of Sanitary Diaphragm Valve are as follows:

1: Handwheel operation is not flexible

Reason: ① Valve stem is bent. ② Thread is damaged

Solution: ① Replace the valve stem. ② Trim the thread and add lubricant

2: Pneumatic diaphragm valve cannot open and close automatically

Reason: ① Air source pressure is too low. ② Spring tightening force is too large. ③ Rubber diaphragm is damaged

Solution: ① Increase air supply pressure. ② Reduce spring tightening force. ③ Replace diaphragm

3: Leakage at the connection between valve body and valve cover

Reason: ① Loose connection bolts. ② Rubber layer in valve body is broken

Solution: ① Tighten the connection bolts. ② Replace valve body