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Pneumatic ball valve factory detailed valve in the industry how to select the type


Release time:

2021-05-29

1. Conventional valves include butterfly valves, gate valves, ball valves and plug valves.Pneumatic ball valveThe range of valves used in water supply pipes. 2, in order to reduce the depth of the pipe, the general diameter of the larger pipe selection butterfly valve; butterfly valve main disadvantage is that the butterfly plate occupies a certain water section, increase a certain head loss.

Pneumatic ball valve factory detailed valve in the industry how to select the type

1. Conventional valves include butterfly valves, gate valves, ball valves and plug valves.Pneumatic ball valveThe range of valves used in water supply pipes.
2, in order to reduce the depth of the pipe, the general diameter of the larger pipe selection butterfly valve; butterfly valve main disadvantage is that the butterfly plate occupies a certain water section, increase a certain head loss.
3, the depth of the soil is not affected, and strive to match the gate valve; electric gate valve large diameter vertical gate valve height affects the depth of the pipe, the length of the large diameter horizontal gate valve increases the horizontal area of the pipe, affecting the arrangement of other pipelines.
4, ball valve and plug valve casting and processing is difficult, the price is more expensive, generally applicable to small and medium-sized diameter pipe. Ball valve and plug valve is to maintain the gate valve single, small flow resistance, reliable sealing, flexible action, easy operation and maintenance, etc. Plug valves also have similar advantages, but the water section is not circular.
5. In recent years, due to the improvement of casting technology, the use of resin sand casting can avoid or reduce mechanical processing, thereby reducing costs. Therefore, the feasibility of ball valves for large-diameter pipelines is worth exploring. As for the size of the caliber of the dividing line should be divided according to the specific circumstances of each region. 6, at present, the valve market has developed a soft seal gate valve, this new type of gate valve traditional wedge or parallel double gate plate gate valve has several differences.
7. The valve body and valve cover of the soft sealing gate valve are cast by precision casting method, which is formed at one time. No mechanical processing is needed at all, and the sealing copper ring is not used to save non-ferrous metals;
8. There is no pit at the bottom of the soft sealing gate valve, no slag accumulation, and the failure rate of gate valve opening and closing is low.
9. The soft sealing rubber lining valve plate has uniform size and strong interchangeability.
Therefore, the soft seal gate valve will be the development direction of the gate valve, but also the pipeline water supply industry is willing to accept a valve. Open or close the soft seal gate valve, can not be closed too dead, as long as the water stop effect can be achieved, otherwise it is not easy to open or liner peeling.
10. Most butterfly valves used in the pipeline water supply industry are soft sealing butterfly valves. In view of the damage to the rubber ring during the installation of the butterfly valve, many manufacturers have introduced metal sealing butterfly valves instead of rubber ring sealing butterfly valves. Metal sealing butterfly valve due to the elasticity of the seal is small, the general use of eccentric structure, especially with three-dimensional eccentric structure is more reasonable.