Day: November 8, 2021

Leakage of valve body and bonnet:

Reason:

1. The casting quality of iron castings is not high, and there are defects such as blisters, loose tissues, slag inclusions on the valve body and bonnet body

2. Freeze cracking;

3. Poor welding, there are defects such as slag inclusion, non-welding, stress cracks, etc.;

4. The cast iron valve is damaged after being hit by a heavy object.