Care must be taken to prevent damage to the sealing surface of the parts, especially non-metallic parts, when disassembling and reassembling, and special tools should be used when removing the O-rings

●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 medium (such as gas) in the ball valve. When the working medium is gas, the metal parts can be cleaned with gasoline (GB484-89). Non-metallic parts are cleaned with purified water or alcohol

●The individual parts that have been disassembled can be cleaned by dipping. Metal parts that still have undecomposed non-metallic parts can be scrubbed with a clean, fine cloth impregnated with detergent (to prevent the fibers from falling off and sticking to the parts). When cleaning, all grease, dirt, glue, dust, etc. adhered to the wall must be removed

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

●After cleaning, it is necessary to wait for the volatilization of the washed wall cleaning agent (you can wipe it with a silk cloth that is not soaked in the cleaning agent) for assembly, but it should not be left for a long time, otherwise it will rust and be polluted by dust

●New parts should also be cleaned before assembly

●Lubricate with grease. The grease should be compatible with the metal materials, rubber parts, plastic parts and working medium of the ball valve. When the working medium is gas, e.g. special 221 grease can be used. Apply a thin layer of grease to the surface of the seal mounting groove, a thin layer of grease to the rubber seal, and a thin layer of grease to the sealing surface and friction surface of the valve stem

●Metal chips, fibers, grease (except for specified use), dust and other impurities, foreign bodies, etc., should not be allowed to contaminate, adhere or stay on the surface of the parts or enter the inner cavity during assembly