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Installation instructions for electric hard seal ball valves
Release date:2018/11/29 15:26:00 Number of clicks:73news source:
The disc of the electric hard seal ball valve is mounted in the diameter direction of the pipe. In the cylindrical passage of the electric hard seal ball valve body, the disc-shaped disc rotates around the axis, and the rotation angle is between 0° and 90°. When the rotation is 90°, the valve is fully open. At present, the electric hard seal ball valve is widely used in many fields such as petroleum, chemical, metallurgy, hydropower and the like as a component for implementing the on-off and flow control of the pipeline system. In the well-known butterfly valve technology, the sealing form is mostly sealed, and the sealing material is rubber, polytetrafluoroethylene or the like. Due to structural limitations, it is not suitable for industries such as high temperature resistance, high pressure, corrosion resistance and wear resistance. A relatively advanced butterfly valve is a three-eccentric metal hard sealing butterfly valve. The valve body and the valve seat are connected members, and the sealing surface layer of the valve seat is welded with a temperature-resistant and corrosion-resistant alloy material. The multi-layer soft stack sealing ring is fixed on the valve plate. Compared with the traditional butterfly valve, the butterfly valve has high temperature resistance, is light in operation, and has no friction in opening and closing. When closing, the seal is compensated with the increase of the torque of the transmission mechanism, and the butterfly valve is improved. The sealing performance and the advantage of extending the service life.

Electric hard seal ball valve installation instructions:

1. The pipeline before and after the ball valve is ready. The front and rear pipes should be coaxial and the two flange sealing surfaces should be parallel. The pipe should be able to withstand the weight of the ball valve, otherwise the pipe must be equipped with appropriate support.

2. Purge the front and rear pipelines to remove oil, welding slag and all other impurities.

3. Check the sign of the ball valve and find out that the ball valve is intact. The valve was fully opened and closed several times to confirm that it was working properly.

4. Remove the protective parts on the flanges at both ends of the ball valve.

5. Check the valve hole to remove any dirt that may be present, then clean the valve hole. Even small particles of foreign matter between the seat and the ball may damage the seat sealing surface.

6. Install the valve on the pipeline. Any end of the valve can be mounted on the upstream end. Valves driven by the handle can be mounted anywhere on the pipe. However, ball valves with gearboxes or pneumatic drives should be mounted upright, ie on horizontal pipes, with the drive above the pipe.

7. Install a gasket between the valve flange and the pipeline flange according to the pipeline design requirements.

8. The bolts should be tightened symmetrically, successively and evenly.

9. Connect the pneumatic line (when using a pneumatic drive).

10. Operate the drive to open and close the ball valve several times. It should be flexible and without stagnation, and confirm that it works normally.

11. According to the pipeline design requirements, the sealing performance of the flange joint surface between the pipeline and the ball valve is checked.

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