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TieLing ZG Valve Technology Co.,Ltd
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Ball Valve Should Pay Attention To Fire And Fire
- Jun 23, 2017 -

Ball valve in the 20th century, 50 years, with the rapid development of science and technology, production technology and product structure of continuous improvement, in a short period of 50 years, has rapidly developed into a major valve class. In Western developed countries, the use of ball valves is increasing year by year.

The ball valve is mainly used in the pipeline to cut, distribute and change the direction of flow of the media, it only needs to rotate 90 degrees of operation and a small turning torque can be closed tight. Ball valve is most suitable for the switch, cut off the valve to use.

Since the ball valve is usually made of rubber, nylon and polytetrafluoroethylene as the valve seat sealing material, its use temperature is limited by the valve seat sealing material. The closing effect of the ball valve is to rely on the metal sphere in the role of the medium, between the plastic valve seat to complete each other (floating ball valve). Seat ring in a certain contact pressure, the local area of plastic deformation occurred. This deformation can compensate for the ball manufacturing accuracy and surface roughness, to ensure that the ball valve sealing performance.

 And because the ball valve seat seal is usually made of plastic, so the choice of the structure and performance of the ball valve, to consider the ball valve fire and fire, especially in the petroleum, chemical, metallurgical and other departments, in the flammable, The use of ball valves in equipment and piping systems should also pay attention to fire and fire.

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1. has the lowest flow resistance (actually zero).

2. In the absence of lubricant work will not be stuck, it can be reliably applied with corrosive media and low boiling point liquid.

3. In the larger pressure and temperature range, can achieve 100% seal.

4. Can achieve ultra-fast opening and closing, some structure of the opening and closing time is only 0.05 ~ 0.1s, to ensure that can be used in the test bed automation system. Quick start and close the valve, the operation without impact.

5. Ball-type closure can be automatically positioned in the position.

6. The working medium is reliable on both sides.

7. When fully open and fully closed, the ball and valve seat sealing surface and the media isolation, so high-speed through the valve medium will not cause the sealing surface erosion.

8. Compact, light weight, it can be considered suitable for low temperature media system, the most reasonable valve structure.

9. Valve body symmetry, especially when the valve body structure, can well withstand the stress from the pipeline.

10. The closing member can withstand the high pressure difference when closed.

11. All-welded valve body valve, can be buried in the ground, so that the valve parts from erosion, the maximum service life of up to 30 years, is the oil, natural gas pipeline the best valve.