Precautions For Ball Valves

(1) It is necessary to find out that the pressure of the upstream and downstream pipelines of the ball valve has been discharged before the disassembly and decomposition operation can be carried out.

(2) Non-metallic parts should be taken out of the cleaning agent immediately after cleaning, and should not be soaked for a long time.

(3) The bolts on the flange must be tightened symmetrically, gradually and evenly during assembly.

(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, the metal parts can be cleaned with gasoline (GB484-89). Non-metallic parts are cleaned with purified water or alcohol.

(5) Each single ball valve part that is decomposed 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.

(6) When the ball valve is disassembled and reassembled, care must be taken to prevent damage to the sealing surface of the parts, especially the non-metallic parts, and special tools should be used when taking out the O-ring.

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

(8) New parts also need to be cleaned before assembly.

(9) Use grease for lubrication. 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.

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

Our company is a leading valve manufacturer with over 50 years' experience. Our valves are widely used in the chemical, pharmaceutical and water treatment industries, especially in oilfields. As the council members of China Valve Association, we’re designated as one of the best chemical equipment suppliers. In 1998 we started export business, our main products are ball valves, check valves and API 6D Ball Valve. Now most of them ship to USA directly.Certificate of ISO9001 management system is obtained in 1993, We’re also certified by API 6D in 2009. All our valves are inspected on API598 or API6D before shipment.

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