Ball Valve Operation Precautions
Sep 10, 2023
1. It is necessary to confirm that the pressure in the upstream and downstream pipelines of the ball valve has been relieved before proceeding with the disassembly and disassembly operation.
2. Non-metal parts should be removed from the cleaning agent immediately after cleaning and should not be soaked for a long time.
3. During assembly, the bolts on the flange must be tightened symmetrically, gradually and evenly.
4. The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts and working media (such as gas) in the ball valve. When the working medium is gas, gasoline (GB484-89) can be used to clean metal parts. Clean non-metal parts with pure water or alcohol.
5. Each disassembled ball valve part can be cleaned by dipping. Metal parts that still have undecomposed non-metallic parts can be scrubbed with a clean, fine silk cloth soaked in detergent (to prevent fibers from falling off and adhering to the parts). During cleaning, all grease, dirt, glue, dust, etc. adhering to the wall surface must be removed.
6. When disassembling and reassembling the ball valve, 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.
7. After cleaning, it is necessary to wait for the cleaning agent on the wall to be washed to evaporate (it can be wiped with a silk cloth not soaked in cleaning agent) before assembly, but it must not be left aside for a long time, otherwise it will rust and be contaminated by dust.
8. New parts also need to be cleaned before assembly.
9. Use grease for lubrication. Grease should be compatible with ball valve metal materials, rubber parts, plastic parts and working media. When the working medium is gas, special 221 grease can be used. Apply a thin layer of grease on the surface of the seal installation groove, apply a thin layer of grease on the rubber seal, and apply a thin layer of grease on the sealing surface and friction surface of the valve stem.
10. During assembly, metal chips, fibers, grease (except those specified for use), dust and other impurities, foreign matter, etc. should not be allowed to contaminate, adhere to, or stay on the surface of the part or enter the inner cavity.
