Pneumatic hard sealing butterfly valve is used with the rotation of the valve to do the opening and closing of the circular disc to achieve the opening of the pneumatic valve used to do the main cut-off valve can also be used to regulate or segment and adjust the valve function, the current valve In low-pressure large and medium-diameter pipe on the use of more and more. Pneumatic butterfly valve seal the main advantages of simple structure, small size and light weight, low cost, the characteristics of pneumatic disc valve is particularly significant, installed in high-altitude road, after two five-way solenoid valve control easy to operate, but also adjustable flow media. Fluid resistance is small, medium and large diameter pneumatic disc valve fully open when the effective circulation area larger, quick opening and closing effort, the disc pull rotation angle of 90 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 is small, low pressure can be achieved good seal, valve sealing material NBR, fluorine rubber, food rubber, lining PTFE so good sealing performance, including hard sealing disc Valves for soft and hard laminated metal sheet with metal hard seal and elastic seal weight advantages, both in the case of low temperature has excellent sealing performance.
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