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E-mail: sales@sangaovalve.com


ADD: NO.7 road miqin, river chan development zone,Xian China.

Maintenance technology of ball valve

Ball valve repair:
Longer service life and maintenance free period will depend on several factors: normal working conditions, maintaining a consistent temperature / pressure ratio, and reasonable corrosion data.
Be careful:
- in the closing state of the ball valve, there is still a pressurized fluid inside the valve body
- disconnect the power or air supply before servicing the ball valve
- before the ball valve is repaired, the actuating mechanism is separated from the support
- new parts should be cleaned before assembly
- before the ball valve is repaired, release the line pressure and leave the valve in the open position
- the bolts on the flanges must be symmetrical and tightened gradually and evenly when assembled
- it is necessary to find out the pressure on the ball valve and the downstream pipe before removing the pressure to disassemble and disassemble the valve
- to break down and reassemble, care must be taken to prevent damage to the sealing surfaces of components, especially non-metallic components. Take out the O ring and use special tools
- cleaning agent shall be compatible with rubber, plastic, metal parts and working medium (such as gas) in the ball valve. When the working medium is gas, the metal parts can be cleaned by using gasoline (GB484-89). Non metallic parts are cleaned with pure water or alcohol
- break down the individual parts can be cleaned using immersion method. The metal non metal still did not break down the left can be used to clean fine clean silk impregnated with cleaning agents (to prevent adhesion of fiber loss on the part) scrub. When cleaning, remove all the grease, dirt, glue, dust and so on on the wall
- after cleaning the non-metallic parts, remove them immediately from the cleaning agent and not soak them for a long time
- need to be cleaned by washing the wall after volatile cleaning agent (cleaning agent can not dip silk rub) for assembly, but not for a long time on hold, otherwise it will rust, dust pollution
- metal scraps, fibres, Oils (except those used), dust and other impurities, foreign matter, etc. shall be allowed to be contaminated, adhered or stuck on the surface of the parts or into the lumen
- use grease lubrication. Grease shall be compatible with ball valve, metal material, rubber parts, plastic parts and working medium. When the working medium is gas, it can be used, such as special 221 grease. Apply a thin layer of grease to the surface of the mounting groove of the seal. Apply a thin layer of grease to the rubber seal. Apply a thin layer of grease to the sealing surface of the valve stem and to the friction surface