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TieLing ZG Valve Technology Co.,Ltd
Add:Fuzhou Road,Economic Development Zone,Tieling,Liaoning,China
Tel:+86-24-72690555
Fax:+86-24-72690111
Ph:+8615941025678
E-mail:tlvalve@aliyun.com
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Ball Valve To Be Repaired Or Replaced
- May 17, 2017 -

1, Ball Valve must first identify the ball valve, the downstream pipeline has been unloading pressure, in order to disassemble the decomposition operation.

2, Ball Valve decomposition and re-assembly must be careful to prevent the damaged parts of the sealing surface, especially non-metallic parts, remove the O-ring should use special tools.

3, Ball Valve the assembly of the flange on the flange must be symmetrical, step by step, even tighten.

4, Ball Valve cleaning agents should be with the ball in the rubber parts, plastic parts, metal parts and working medium (such as gas) are compatible. When the working medium is a gas, the metal parts can be cleaned with gasoline. Non-metallic parts are washed with pure water or alcohol.

 5, Ball Valve the decomposition of a single part can be washed with immersion method. Metal parts that are left with undecomposed non-metallic parts can be scrubbed with a clean, fine, dipped silk cloth (to prevent fiber from falling off on the part). Cleaning to remove all adhere to the wall of the grease, dirt, plastic, dust and so on.

6, non-metallic parts should be removed immediately after cleaning from the cleaning agent, not a long time soaking.

 7, after cleaning to be washed wall cleaning agent after evaporation (can be used to clean the cloth cleaning cloth), but not for a long time to shelve, otherwise it will rust, dust pollution.

 8, the new parts need to be cleaned before assembly.

 9, use grease lubrication. Grease should be compatible with ball valve metal material, rubber parts, plastic parts and working medium. When the working medium is gas, for example, special gas is used. Apply a thin layer of grease to the surface of the seal mounting groove, apply a thin layer of grease to the rubber seal, apply a thin layer of grease to the sealing surface and friction surface of the valve stem.

10, the assembly should not allow metal debris, fiber, grease (except for the provisions of the use of) dust and other impurities, foreign body pollution, adhesion or stay in the surface of the parts or into the cavity.

Ball valve online maintenance

Replacement of the stem packing 40 or 45, O-rings 56, 112, and external parts can be carried out on the pipeline without removing the valve from the line. The decomposition order is divided according to the different drive devices as follows: Ball valve with handle

Replacement of packing 45:

(1) Close the valve on the lower and lower valves. Discharge the pressure in the pipe before and after the ball valve.

 (2) the ball valve in a fully closed state.

 (3) Unscrew the nut 52, remove the washer 75, the wrench 74 and the handle 47.

(4) Unscrew the nut 48, remove the spring washer 49, the stem stopper 66, and the packing gland 50.

(5) Remove the packing 45.

(6) check the removed parts, if damaged to be repaired or replaced, the parts clean.

 (7) scrub and lubricate the stuffing box sealing surface.

(8) into the new packing 45.

 (9) The packing gland 50, the stem stopper 66 and the spring washer 49 are attached in the reverse order of the decomposition, and the parts are tightened with the nut 48.

 (10) and then the wrench head 74 and the handle 47, the washer 75 is fitted, and the nut 52 is tightened.

(11) Operation handle Check the opening of the ball valve Close the flexibility.

 (12) Air tightness test.

2 ball valve with gear box

Replacement of packing 45:

 (1) Close the valve on the lower and lower valves. Deflate the pressure in the pipe before and after the ball valve.

 (2) the ball valve in a fully closed state.

(3) Unscrew the screws 10 and remove the gearbox.

(4) Unscrew the screw 15 and remove the drive flange 34.

(5) Unscrew the nut 48, remove the spring washer 49 and the packing gland 50, and remove the packing 45.

(6) check the removed parts, if damaged, be repaired or replaced, the parts clean.

(7) to clean and lubricate the stuffing box sealing surface.

(8) into the new packing 45.

(9) The packing gland 50 and the spring washer 49 are attached in the reverse order of the decomposition, and the parts are fastened with the nuts 48. And then the driver flange 34 is fastened with screws 15.