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Talking About The History Of Butterfly Valve You Do Not Know
- Oct 23, 2017 -

The original butterfly valve is a simple, and tightly closed baffle valve. Usually used as a flow control valve and a damper in a water line system. With the anti-chemical corrosion of synthetic rubber on the application of butterfly valve, butterfly valve performance can be improved. As the synthetic rubber with corrosion resistance, erosion resistance, dimensional stability, good elasticity, easy forming, low cost and other characteristics, and according to the different requirements of the use of different properties of synthetic rubber to meet the use of butterfly valve conditions, Widely used in the manufacture of butterfly valve lining and elastic seat.

Because PTFE (PTFE) has a strong corrosion resistance, stable performance, easy aging, low coefficient of friction, easy to shape, dimensional stability, and also by filling, adding appropriate materials to improve its overall performance, get better strength, The friction coefficient of the butterfly valve sealing material, to overcome some of the limitations of synthetic rubber, and thus PTFE as the representative of the polymer material and its filler modified materials in the butterfly valve has been widely used, so that the butterfly valve Performance has been further improved, the emergence of a higher temperature, a wider range of pressure, sealing performance, longer life butterfly valve. To meet the high and low temperature, strong erosion, long life and other industrial applications of the use of requirements, nearly a decade, the metal seal butterfly valve has been a great development. With the high temperature, low temperature resistance, strong corrosion resistance, strong erosion resistance, high strength alloy materials in the application of butterfly valve, metal sealing butterfly valve in the high and low temperature, strong erosion, long life and other industrial fields have been widely used, A large diameter (9750mm), high pressure (2.2kN / cm2), wide temperature range (-102 ~ 606 ℃) butterfly valve, so that the butterfly valve technology to a new level.

As the butterfly valve plate movement with a wipe, so most of the butterfly valve can be used with suspended solids particles, according to the strength of the seal can also be used for powder and granular media.

The butterfly valve is a valve that opens, closes and regulates the fluid passage by reciprocating 90 degrees with a disc type opening and closing member. Butterfly valve is not only simple structure, small size, light weight, the material consumption of the province, the installation of small size, and the driving torque is small, easy to operate, and can also have a good flow at the same time the function of closure and sealing characteristics, Years to develop one of the fastest varieties of valves. Especially in the United States, Japan, Germany, France, Italy and other industrial developed countries, the use of butterfly valve is very extensive. The use of the variety and the number continues to expand, and to high temperature, high pressure, large diameter, high sealing, long life, excellent regulation characteristics and a multi-functional valve development, its reliability and other performance indicators are higher Level, and has partially replaced the globe valve, gate valve and ball valve. With the butterfly valve technology progress. In the foreseeable short period of time, especially in large and medium caliber, low pressure in the field of use, butterfly valve will become the leading form of the valve.

The design and manufacture of the butterfly valve has reached a whole new level due to the application of computer aided design (CAD) and computer aided manufacturing (CAM) and flexible manufacturing system (FMS) in the valve industry. Not only a comprehensive reform of the valve design and calculation methods to reduce the professional and technical personnel heavy repetitive routine design work, so that technical staff have more energy to improve the technical performance of products and new product research and development, shorten the cycle, Labor productivity. Especially in the field of metal sealing butterfly valve, due to the application of CAD / CAM, there are three-dimensional sealing by CAD design and manufactured by cAM CNC machining, so that the sealing surface of the valve does not have any extrusion, abrasion and abrasion , So that the butterfly valve sealing and service life to increase the order of magnitude.

When the butterfly valve is fully open, it has a small flow resistance, and when it is open between about 15 ° and about 70 °, it can carry out sensitive flow control. Therefore, in the field of large diameter adjustment, the application of butterfly valve is very common, and Gradually become the main valve type.