High-Pressure Ball Valves Manufacturers introduce the operation and use precautions of high-pressure ball valves:
1) Make sure the pipeline and valve have been flushed before operation.
2) The operation of the valve is completed by driving the valve stem to rotate according to the magnitude of the input signal of the actuator: when the forward rotation is 1/4 circle (90°), the valve is closed. The valve opens when the reverse rotation is 1/4 turn (90°).
3) When the direction-indicating arrow of the actuator is parallel to the pipeline, the valve is in the open state; when the indicating arrow is perpendicular to the pipeline, the valve is in the closed state. Maintenance, with long service life and maintenance-free periods, will depend on several factors: normal operating conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data.
1. When the ball valve is closed, there is still pressurized fluid inside the valve body.
2. Before maintenance, relieve the pipeline pressure and keep the valve in the open position.
3. Before maintenance, disconnect the power or air source.
4. Before maintenance, separate the actuator from the bracket.
5. It must be confirmed that the upstream and downstream pipelines of the ball valve have been relieved of pressure before disassembly and decomposition can be performed.
6. 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 taking out the O-ring.
7. The bolts on the flange must be tightened symmetrically, gradually, and evenly during assembly.
8. The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts, and working medium (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.
9. The disassembled individual parts can be cleaned by dipping. Metal parts with non-metallic parts that have not been decomposed can be scrubbed with a clean, fine silk cloth soaked in a cleaning agent (to prevent fibers from falling off and sticking to the parts). When cleaning, all grease, dirt, glue, dust, etc. adhering to the wall surface must be removed.
10. Non-metallic parts should be taken out of the cleaning agent immediately after cleaning, and should not be soaked for a long time.
11. After cleaning, wait for the cleaning agent on the wall surface to be washed to volatilize (it can be wiped with a silk cloth not soaked in cleaning agent) for assembly, but it should not be left for a long time, otherwise it will rust and be polluted by dust.
12. New parts also need to be cleaned before assembly.
13. Lubricate with grease. Grease should be compatible with ball valve metal materials, rubber parts, plastic parts, and working medium. When the working medium is gas, special 221 lubricating greases can be used, for example. 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.
14. Metal scraps, fibers, grease (except for specified use), dust and other impurities, foreign matter, etc. shall not be allowed to contaminate, adhere or stay on the surface of the parts or enter the inner cavity during assembly.