Wenzhou Longwan Junkai Valve Factory is located in Longwan, the valve capital of China. Is a professional manufacturer of stainless steel valves. The main products are: stainless steel ball valve, stainless steel Y-type filter, stainless steel flange, stainless steel mirror, stainless steel gate valve, stainless steel globe valve, stainless steel check valve, etc.
Junkai’s stainless steel ball valves are compact in structure, easy to operate and maintain, and are mainly made of 304, 316 and 321 stainless steel. So the following is an introduction to the maintenance of stainless steel ball valves.
The maintenance procedure of stainless steel ball valve is generally as follows:
1. Blow the outer surface of the stainless steel ball valve with compressed air.
2. Check and write down the stainless steel ball valve mark.
3. Disassemble the stainless steel ball valve after recording.
4. Clean the parts with kerosene.
5. Check parts for defects:
1) The strength of the valve body can be checked by hydraulic test.
2) Check the cooperation between the valve seat and the valve body, as well as the closing parts and the sealing ring, and conduct a tightness test at the same time.
3) Check the thread wear of the stem and stem bushing.
4) Check the sealing ring of the closing member and the valve body.
5) Check the joint surface of the flange.
6. Repair the valve body:
1) Repair defects by welding, replace the sealing ring or butt welding sealing surface.
2) The tightness test should be carried out on the valve body and the newly replaced sealing ring.
3) Trim the flange joint surface.
4) Grinding the sealing surface.
7. Repair closing parts:
1) Welding repair defects or surfacing welding sealing surface.
2) Polish or grind the sealing surface.
8. Replace the irreparable parts.
9. Reassemble the ball valve.
10. Carry out the overall hydraulic test of the ball valve.
11. The ball valve is painted and marked according to the original record.
The above are the steps of stainless steel ball valve inspection and maintenance.