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Ball Valve Simple Structure, Easy Maintenance
Aug 02, 2017

Ball valve is not only simple structure, good sealing performance, but also in a certain range of nominal diameter smaller, light weight, less material consumption, installation size is small, and drive torque is small, easy to operate, easy to achieve fast opening and closing, More than ten years the fastest growing one of the valve varieties.

First, the main lines of oil and gas transportation, need to clean the pipeline, but also need to be buried in the ground, the choice of full diameter, all welded structure of the ball valve; buried in the ground, select the full diameter welding or flange connection ball valve ; Branch pipe, use flange connection, welding connection, full diameter or reduced diameter ball valve.

Second, the refined oil pipeline and storage equipment, the choice of flange connected ball valve.

Third, the city gas and natural gas pipeline, the choice of flange connection and internal thread connection of the floating ball valve.

Fourth, the metallurgical system in the oxygen pipeline system, should be selected after a strict off

5, low-temperature medium piping systems and devices, should use the valve with the low-temperature valve.

Six, the refining unit of the catalytic cracking unit piping system, the choice of lift rod ball valve.

7, the chemical system of acid and other corrosive media devices and piping systems, should use austenitic stainless steel, PTFE valve seat for the whole stainless steel ball valve.

Eight, metallurgical systems, power systems, petrochemical plants, urban heating systems in the high-temperature medium of the pipeline system or device, the choice of metal-to-metal sealed ball valve.

Nine, the need for flow control, the choice of worm gear drive, pneumatic or electric with V-shaped opening of the adjustment ball valve.

① The biggest feature of the ball valve is in many types of valves in the fluid resistance of the smallest flow characteristics of the best.

② for the requirements of fast opening and closing of the occasion generally use the ball valve.

③ compared with the butterfly valve, its weight is larger, the structure size is relatively large, it should not be used for too much diameter pipe.

④ ball valve and plug valve compared to the switch light, relatively small size, it can be made into a large diameter valve.

⑤ ball valve seal is reliable, simple structure, easy maintenance, sealing surface and the ball is often in a closed state, not easily eroded by the media.

⑥ with the butterfly valve, long-term impact it can not be applied in the petrochemical production plant is the problem of thermal expansion or wear will cause a tight seal. Soft seal ball valve has better sealing performance, but when it is used for flammable, explosive media pipeline, still need to fire safety test and anti-static test. Therefore, the petrochemical production unit on the ball valve application is not much. In recent years, many ball valve manufacturers have developed a number of new structure of the ball valve, such as the ball valve, eccentric ball valve, etc., some ball valve seat will be set into metal elastic seat, so that in the case of thermal expansion and wear is still good seal. Therefore, these ball valves have been used in the petrochemical production plant.

⑦ through the ball valve for cutting off the media, three-way ball valve can change the direction of the media flow or distribution. Articles from the network, by the Shanghai Zize pump to adjust the ball valve opening and closing quickly, easy to achieve emergency cut off the accident. As the throttling may cause damage to the seal or the ball, generally do not use ball valve throttling. Full channel ball valve is not suitable for regulating flow.





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