A long service life and maintenance-free period depend on several factors: normal operating conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data:

1. Even when the ball valve is closed, pressurized fluid still exists inside the valve body.

2. Before repair: Release pipeline pressure and place the valve in the open position; disconnect the power or gas supply; detach the actuator from the support.

3. It is necessary to confirm that the pressure in the upstream and downstream pipelines of the ball valve has been released before disassembly.

4. During disassembly and reinstallation, care must be taken to avoid damaging the sealing surfaces of parts, especially non-metallic parts. Special tools should be used when removing O-rings.

5. During installation, the bolts on the flange must be tightened symmetrically, gradually, and evenly.

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

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

8. After cleaning, wait for the cleaning agent on the cleaned surface to evaporate (you can wipe it with a cloth that has not been soaked in cleaning agent) before installation. Do not leave them for a long time, otherwise they will rust or become contaminated with dust.

9. New parts must also be cleaned before installation.

10. During installation, metal shavings, fibers, grease (except for those used according to regulations), dust, and other impurities and foreign objects should not be allowed to contaminate, adhere to, or remain on the surface of the parts or enter the internal cavity. If a slight leak occurs at the packing, the valve stem nut must be tightened again.