Fault phenomenon: valve has internal leakage
Cause Analysis:
1. The valve seat and valve body are too loosely assembled
2. There are sand holes between the valve seat and the valve body
3. The gasket between the valve seat and the valve body is not suitable

Elimination method:
1. Remove the valve seat, repair and weld the leak, then turn it, and then embed the valve seat for polishing, or replace the valve seat directly
2. Repair welding to the place with blisters, then polish and grind
3. Replace the appropriate gasket

Precautions:
1. Conduct data analysis according to flow meter, temperature meter, etc. to find problems in time
2. Comprehensive inspection of valve seat and valve body during major and minor repairs

Safety Precautions:
1. Apply for a work ticket before the equipment is overhauled and take isolation measures
2. Valve disintegration to prevent soda scald