结构简单、紧凑、重量轻、易于安装和拆卸、维修方便；该硬密封蝶阀结构简单、紧凑、重量轻、易于安装和拆卸、维修方便。 The hard-sealed butterfly valve has a simple, compact, light-weight structure that is easy to install and disassemble, and is easy to maintain; the hard-sealed butterfly valve has a simple, compact, light-weight structure that is easy to install and disassemble and easy to maintain. The stainless steel "U" -shaped sealing ring has a certain degree of elasticity. It has excellent sealing performance with the butterfly plate at high and low temperatures.
The three-dimensional eccentricity of this hard-sealed butterfly valve has been calculated strictly. There is almost no friction between the "U" -shaped seal ring and the butterfly plate, the service life is long, and it has the function of closing and tightening. The sealing surface of the butterfly plate is made of cobalt-based hard alloy. The sealing surface is resistant to wear and has a long service life. The butterfly valve has a unique structure, and the "switch" can be completed only by turning the valve stem by 90 °. Flexible, convenient, labor-saving, not affected by the pressure of the medium, reliable sealing performance.
The hard seal butterfly valve uses a "U" stainless steel seal ring, which is a three-dimensional eccentric contact with the polished butterfly plate. The traditional eccentric disc valve solves the disadvantage that the sealing surface is still in sliding contact friction at the instant of opening and closing 0 ° ~ 10 °, and realizes the effect that the sealing plate is separated at the instant of opening and the contact is sealed at the moment of contact, which extends the service life and sealing performance Good purpose. Therefore, hard-sealed butterfly valves are widely used in metallurgical, electric power, petroleum, chemical, air, gas, combustible gas, and water supply and drainage pipelines with a medium temperature ≤ 550 ° C. It is a good device for regulating the flow rate and cutting off fluids.
Hard-sealed butterfly valves are suitable for flow regulation. The pressure loss of the butterfly valve in the pipeline is relatively large, about three times that of the gate valve. Therefore, when selecting a butterfly valve, full consideration should be given to the influence of pressure loss on the piping system, and the solidity of the butterfly plate under the pressure of the pipeline medium when closing should be considered. Sex.
The main structural features of hard-sealed butterfly valves are wafer-type and flange-type triple eccentric seals. The valve seat seal adopts two types of structures: elastic seal and soft-hard compatible multi-layer seal. Its sealing performance is reliable, ensuring that the butterfly plate does not Contacting the seal seat eliminates the uneven load of the seal seat, prolongs the service life, ensures reliable sealing performance, and has the characteristics of high temperature resistance, wear resistance and corrosion resistance.