Daily Maintenance Of Ball Valves

Having a long service life and maintenance free period will depend on the following factors: normal working conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data

When the ball valve is closed, there is still pressurized fluid inside the valve body

Before maintenance: Release the pipeline pressure and keep the valve in the open position; Disconnect the power or air source; Detach the actuator from the bracket

It is necessary to first verify that the upstream and downstream pipelines of the ball valve have been depressurized before proceeding with disassembly and disassembly operations

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

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

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-metallic parts with pure water or alcohol

After cleaning non-metallic parts, they should be immediately removed from the cleaning agent and should not be soaked for a long time

After cleaning, it is necessary to wait for the wall cleaning agent to evaporate (using a silk cloth that has not been soaked in the cleaning agent) before assembly, but it must not be left for a long time, otherwise it will rust and be contaminated by dust

New parts also need to be cleaned thoroughly before assembly

During assembly, metal debris, fibers, grease (excluding those specified for use), dust, other impurities, foreign objects, etc. should not be allowed to contaminate, adhere or stay on the surface of the parts or enter the inner cavity. If there is slight leakage at the packing, the valve stem nut must be tightened again.