Pneumatic ball valve
s are widely used in system control in chemical, petroleum, textile, electric power, food and pharmaceutical, refrigeration, and papermaking industries. However, failures will inevitably occur in long-term use, so after a period of use, it is necessary to use the neutral gear to check and maintain to see if its performance is normal. So how should we check it? Let's take a look at it together: 1. The ball valve can only be disassembled and disassembled after the pressure before and after the ball valve is removed. 2. In the process of disassembling and reassembling the ball valve, it is necessary to protect the sealing parts, especially the non-metal parts, tools such as O-rings and other parts. 3. When the ball valve body is reassembled, the bolts must be tightened symmetrically, gradually and evenly. 4. 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. 5. The decomposed single parts can be cleaned by dipping. The metal parts with undecomposed non-metal parts can be scrubbed with a clean and fine silk cloth impregnated with cleaning agent (to prevent the fibers from falling off and adhering to the parts). When cleaning, all grease, dirt, glue, dust, etc. adhering to the wall must be removed. 6. Non-metal parts should be removed from the cleaning agent immediately after cleaning, and should not be soaked for a long time. 7. After cleaning, it needs to be assembled after the cleaning agent on the wall to be washed has volatilized (can be wiped with a silk cloth that has not been soaked in cleaning agent), but it should not be put on hold for a long time, otherwise it will rust and be polluted by dust. 8. New parts also need to be cleaned before assembly. 9. 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, for example, 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. Metal chips, fibers, grease (except 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 cavity during assembly.
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