The Preparation of Ball Valve before Installation

1. Ensure that the pipeline at the installation position of the ball valve is in the coaxial position. The two flanges on the pipeline should be parallel, and confirm that the pipeline can bear the weight of the ball valve.

2. Check whether there are impurities and welding slag in the pipeline, and the regulating valve must purge the pipeline.

3. Check the nameplate of the ball valve, and fully open and close the ball valve for several times to confirm that the valve can work normally, and thoroughly check all the details of the valve to ensure that the valve is intact.

4. Remove the protective cover at both ends of the valve, check whether the body is clean, clean the body cavity, because the sealing surface of the ball valve is ball shape, even small debris may cause damage to the sealing surface.

Installation of Ball Valve

1. Any section of the ball valve can be installed in the upstream end, Shanghai nimei ball valve handle ball valve can be installed in any position of the pipeline, if equipped with actuator (such as gear box, electric-pneumatic actuator) ball valve, it must be installed vertically, valve inlet and outlet in a horizontal position.

2. Between the ball valve flange and the pipeline flange according to the design requirements of the pipeline with sealing gasket.

3. Bolts on the flange shall be tightened symmetrically, successively and uniformly.

4. If the ball valve with pneumatic, electric and other actuators, according to the manual to complete the installation of air source, power supply.

Inspection After Installation Of Ball Valve

1.After installation, start the ball valve open and close several times, should be flexible, uniform force, ball valve work normally.

2. According to the design requirements of pipeline pressure, test the sealing performance of the joint surface of ball valve and pipeline flange after passing through pressure.

Ball Valve Maintenance

1. Only by removing the pressure before and after the ball valve can the ball valve be disassembled and decomposed.

2. In the decomposition and reassembly process of the ball valve, it is necessary to protect the sealed parts, especially non-metallic parts, such as o-ring and other parts, with special tools.

3. Bolts must be tightened symmetrically, step by step and evenly when the ball valve body is reassembled.

4. Cleaning agent should be compatible with rubber parts, plastic parts, metal parts and working medium (such as gas) in the ball valve.When the working medium is gas, gasoline (gb484-89) can be used to clean the metal parts.Clean nonmetallic parts with purified water or alcohol.

5. The decomposed individual parts can be cleaned by immersion washing.The metal parts that have not been decomposed can be cleaned by a clean and fine dip silk cloth with cleaning agent (to avoid fiber falling off and sticking to the parts).When cleaning, remove all the grease, dirt, glue, dust etc.

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

7, after cleaning to be washed after the wall cleaning agent volatilization (can be used not dipped cleaning agent silk cloth wipe) for assembly, but not for a long time, otherwise it will rust, dust pollution.

8. New parts should be cleaned before assembly.

9. Use grease for lubrication.Grease should be compatible with ball valve metal materials, rubber parts, plastic parts and working medium.When the working medium is gas, it can be used, for example, ter221 grease.Apply a thin layer of grease on the surface of the mounting groove of the seals, a thin layer of grease on the rubber seals, and a thin layer of grease on the sealing surface and friction surface of the valve stem.

10. During the assembly, it shall not be allowed to contaminate, adhere to or stay on the surface of the parts or enter the inner cavity with metal debris, fiber, grease (except for those required for use), dust and other impurities or foreign matters.