What To Pay Attention To When Repairing 3-piece Ball Valve

2. Before repairing, release the line pressure and place the valve in the open position.

3. Before repairing, disconnect the power or air supply.

4. Before repairing, disconnect the actuator from the bracket.

5. Ensure that the upstream and downstream pipelines of the 3 Piece Ball Valve are depressurized before disassembling.

6. During disassembly and reassembly, be careful to avoid damaging the sealing surfaces of components, especially non-metallic components. Use specialized tools to remove O-rings.

7. During assembly, tighten the bolts on the flange symmetrically, gradually, and evenly.

8. The cleaning agent should be compatible with the rubber, plastic, and metal components of the ball valve, as well as the working medium (e.g., gas). When using gas as the working medium, gasoline (GB484-89) can be used to clean metal parts. Non-metallic parts can be cleaned with purified water or alcohol.

9. Disassembled individual components can be cleaned by immersion cleaning. Metal parts with undisassembled non-metallic components can be scrubbed with a clean, fine silk cloth soaked in cleaning agent (to prevent loose fibers from adhering to the components). During cleaning, remove all grease, dirt, glue, dust, and other debris adhering to the surface.

10. Non-metallic parts should be removed from the cleaning agent immediately after cleaning and should not be soaked for extended periods.

11. After cleaning, wait until the cleaning agent evaporates (you can wipe with a silk cloth not soaked in cleaning agent) before reassembling. However, do not leave the parts for extended periods to prevent rust or dust contamination.

12. New parts should also be cleaned thoroughly before assembly.

13. Lubricate with grease. The grease should be compatible with the ball valve's metal, rubber, and plastic components, as well as the working medium. For gas, a grease such as Special 221 can be used. Apply a thin layer of grease to the seal mounting groove, to the rubber seal, and to the sealing and friction surfaces of the valve stem.

14. During assembly, do not allow metal debris, fibers, grease (except for specified uses), dust, or other impurities or foreign matter to contaminate, adhere to, or remain on the surface of the parts or enter the internal cavity.