How to maintain high temperature and high pressure valves, top ten measures:

1. Lubricate with grease. Lubricating grease should be compatible with high-temperature and high-pressure valve metal materials, rubber parts, plastic parts, and working media. When the working medium is gas, special 221 lubricating grease can be used, for example. Apply lubricating grease on the surface of the seal installation groove, apply lubricating grease on the rubber seal, and apply lubricating grease on the sealing and friction surfaces of the valve stem.

2. When disassembling and reassembling, care must be taken to prevent damage to the sealing surface of the parts, especially non-metallic parts. Special tools should be used when removing the O-ring.

3. New parts also need to be cleaned thoroughly before assembly.

4. The cleaning agent should be compatible with rubber parts, plastic parts, metal parts, and working media (such as gas) in high-temperature and high-pressure valves. When the working medium is gas, gasoline (GB484-89) can be used to clean metal parts. Non metallic parts should be cleaned with purified water or alcohol.

5. During assembly, metal debris, fibers, grease (excluding those specified for use), dust, and other impurities, foreign objects, etc. should not be allowed to contaminate, adhere, or remain on the surface of the parts or enter the internal cavity.

6. The decomposed individual parts can be cleaned by immersion washing. Metal parts that have not yet decomposed can be cleaned with a clean and fine silk cloth soaked in cleaning agent (to prevent fibers from falling off and adhering to the parts). During cleaning, all grease, dirt, adhesive buildup, dust, and other substances adhering to the wall surface must be removed.

7. Non metallic parts should be immediately removed from the cleaning agent after cleaning and should not be soaked for a long time.

8. The bolts on the flange must be tightened symmetrically, gradually, and evenly during assembly.

9. After cleaning, it is necessary to wait for the wall cleaning agent to evaporate (which can be wiped with a silk cloth that has not been soaked in cleaning agent) before assembly. Prolonged storage will cause rust and dust pollution.

10. It is necessary to confirm that the upstream and downstream pipelines of the high-temperature and high-pressure valve have been depressurized before proceeding with disassembly and assembly operations.