Pneumatic flanged butterfly valve consists of angular stroke pneumatic piston actuator and butterfly valve body, the main advantages: simple structure, small size, light weight, low cost, pneumatic flanged butterfly valve this feature is particularly significant, installed in high-altitude road, after two Bit five-way solenoid valve control easy to operate, but also adjustable flow media. Fluid resistance is small, large diameter pneumatic flange valve fully open when the effective flow area larger, opening and closing quickly and effortlessly, the disc to rotate 90 degrees to complete the opening and closing, as the disc on both sides of the disc drive medium force close to equal , And the resulting torque in the opposite direction, so opening and closing torque smaller, low pressure can achieve good sealing, pneumatic flange butterfly valve sealing material NBR, fluoroelastomers, including hard sealing disc valve for the multi-level metal seal, With the advantages of elastic seal, both in the case of low temperature has excellent sealing performance. Therefore, the pneumatic flange butterfly valve is widely used in metallurgy, electricity, petroleum, chemical, air, gas, combustible gas and water supply and drainage and other corrosive media pipeline. Pneumatic flanged butterfly valve is based on three-dimensional design of eccentric principle, so that the sealing surface of the space trajectory idealized, the sealing surface between no friction, no interference, combined with the sealing material properly selected, so that the butterfly valve sealing, corrosion resistance , High temperature resistance and wear resistance has been a reliable guarantee. Its main features are as follows: 1, open the moment, flexible and convenient, saving energy. 2, three-dimensional structure of the heart, the more close the more tight disc, the sealing performance is reliable, to no leakage. 3, high pressure, corrosion resistance, wear resistance, long life and so on.
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