The butterfly valve is mostly used in the water system pipe, and the water system pipe is related to the people's livelihood, so the butterfly valve can be said to be a common valve. However, the use of butterfly valves is very wide, not only in the water system, with the increase of butterfly valve types, butterfly valves have been applied to all walks of life, can adapt to a variety of working conditions. Then this article will introduce you to the types of butterfly valves.

The reason why the butterfly valve is so widely used is that it has many kinds, different connection forms, different driving methods, and different materials can make the classification of butterfly valves diverse.

From the connection form, the butterfly valve has several kinds of clamp, flange, clamp and welding. Clamping butterfly valve structure is short, small size is used in the water pipe, not suitable for large caliber; The flange butterfly valve has the widest application range, the diameter is as small as DN50, and the large one can do DN3000; Clamped butterfly valves are more common in fire fighting systems; Welding butterfly valve can withstand high temperature and high pressure. From the driving mode, the butterfly valve has manual, pneumatic, electric and so on. Manual butterfly valve cost moderate, is the first choice of many users; Pneumatic butterfly valve and electric butterfly valve are automatic control valves, no manual operation, the use of air or electricity as a power source, you can drive the valve to work, used in manual can not operate the occasion, the cost is relatively high. In terms of material, the common butterfly valve materials are cast iron, cast steel, stainless steel, aluminum alloy and so on. Cast iron butterfly valve is used in normal temperature and pressure pipelines, which is a very conventional butterfly valve material configuration; The cost of cast steel butterfly valve is higher than that of cast iron butterfly valve, so cast steel butterfly valve is usually equipped with tetrafluoroidal valve seat, used in the chemical industry pipeline; The cost of stainless steel butterfly valve is higher, and it is used more in the environmental protection, medical and food industries; The aluminum alloy butterfly valve is used in the air conditioning system.

The above is the body material, according to the seat material is different, butterfly valve also has rubber seat, PTFE seat and metal hard seal seat. Rubber-sealed butterfly valves are used in water and oil pipelines. Ptfe sealed butterfly valves are used in pipelines with corrosive media; Butterfly valves with hard metal seal are used in high temperature and high pressure pipelines.