subject: Finding Beautiful Butterfly In Flowering Shrubs [print this page] Already known in the butterfly valve technology, sealing in the form of its multi-sealed structure, the sealing material is rubber, PTFE and so on. As the structural features of the restrictions is not suitable for high temperature, high pressure and corrosion resistance, abrasion resistance and other industries. Present a more advanced triple eccentric butterfly valve is metal seal butterfly valve, valve body and seat components for the piece, the valve seat sealing surface layer welding temperature, corrosion resistant alloy material. Stacked multi-layer soft ring fixed in the valve plate, this butterfly valve compared with the conventional high temperature, easy operation, open and close without friction, closed with the transmission of torque to compensate for increased seal and improve the a valve sealing performance and durability advantages. However, this butterfly is still in the course of the following problems: First, as hard and soft layers stacked ring fixed in the valve plate when the valve plate to its normally open state media to form a positive sealing surface erosion, dissection of the soft metal tape by erosion, the direct impact on the sealing performance. Second, by the structural constraints of the structure do not meet the following diameter DN200 valve, because the overall structure of the valve plate thick, large flow resistance. Stainless steel butterfly structure can be divided according to the bias plate, vertical plate, inclined plate, and leveraged. By seals can be divided into relatively closed and seal type two kinds. Soft sealing type commonly used rubber ring seal, seal type commonly used metal ring seal. Currently, Stainless steel butterfly as a piping system used to achieve off and flow control components, has been in the petroleum, chemical industry, metallurgy, water, electricity and many other fields has been very widely used. Affected by steel price, global mining machinery market goes ups and downs, especially for jaw crusher market, impact crushers and stone crushing plant. If the requirement to use flow control valve as the main choice is the right size and type of valve. Butterfly structure principle is particularly suitable for production of large diameter valves. Butterfly not only in oil, gas, chemical, general industrial water treatment is widely used, but also used in thermal power plant cooling water system.
