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Daily maintenance of ball valve
Apr 23, 2018

Having a long service life and maintenance-free period 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 pressurized fluid inside the valve body

Before repair: Release line pressure and leave valve in open position; disconnect power or air supply; disengage actuator from bracket

It must first find out that the pressure on the upper and lower pipelines of the ball valve has been removed before demolition and decomposition operations can be performed.

When disassembling and reassembling, care must be taken to prevent damage to the sealing surfaces of parts, especially non-metallic parts. Special tools should be used when removing 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 media (eg gas) in the ball valve. When the working medium is gas, metal parts can be cleaned with gasoline (GB484-89). Non-metallic parts cleaned with pure water or alcohol

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

After washing, it needs to be cleaned after the wall-washing agent is volatilized (can be wiped with a silk cloth not immersed in cleaning agent), but it must not be left for a long time, otherwise it will be rusty and contaminated by dust.

New parts also need to be cleaned before assembly

During assembly, metal debris, fibers, grease (except for the specified use), dust and other impurities, foreign matter, etc. shall not be allowed to adhere, adhere or stay on the surface of the parts or enter the internal cavity. If there is a micro-discharge at the filling, Then lock the stem nut.

Note: Do not lock too tight. Normally, lock 1/4 to 1 turn again. Leakage will stop.

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