Ball Valve Repair

- Mar 30, 2019-

With a long service life and maintenance-free period, it will depend on several factors: normal working conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data.

When the ball valve is closed, there is still a pressurized fluid inside the valve body.

Remove line pressure and open valve in position before servicing

Disconnect power or air supply before servicing

Disengage the actuator from the bracket before servicing

It must be ascertained that the upper and lower pipes of the ball valve have been relieved of pressure before they can be disassembled and disassembled.

Care must be taken during the disassembly and reassembly to prevent damage to the sealing surfaces of the parts, especially for non-metallic parts. Special tools should be used when removing the O-rings.

The bolts on the flange must be tightened symmetrically, stepwise 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 pure water or alcohol

Non-metallic parts should be taken out of the cleaning agent immediately after cleaning. Do not soak for a long time.

After cleaning, it needs to be assembled after the wall cleaning agent is volatilized (can be wiped with silk cloth without dipping cleaning agent), but it should not be left for a long time, otherwise it will rust and be polluted by dust.

New parts need to be cleaned before assembly

Metal debris, fibers, grease (except for the use), dust, other impurities, foreign matter, etc. should not be allowed to be contaminated, adhered or stay on the surface of the part or enter the inner cavity. If there is micro-leakage at the filling, it must be Then tighten the stem nut.


Note: Do not lock too tightly, usually lock 1/4 turn ~ 1 turn, the leak will stop.