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Pneumatic multi-layer hard seal butterfly valve


product description

Pneumatic multi-level hard seal butterfly valve D643H is a long life, energy saving butterfly valve. Its structure adopts the design of three-dimensional braided heart principle, the valve seat adopts the multi-layer structure with the compatibility of hard and soft seal, the processing is exquisite and the technology is advanced. The product is composed of valve body, butterfly plate, multi-layer seat, stem, transmission mechanism and other main components. Therefore, it is widely used in metallurgy, electric power, petroleum, chemical industry, air, gas, combustible gas, water supply and drainage and other corrosive media pipeline.

Pneumatic multi-layer hard seal adjustment parameters

Test pressureShell test0.
Seal test0.661.11.762.754.4
Air Seal Test0.
leakage rate<0.1×DNmm3/s(in accordance with GB/ t13927-92 standard)
applicable temperatureWcb:-29℃~425℃ SUS-40℃~600℃
Applicable mediumAir, water, steam, gas, oil and acid, alkali, salt with a weak corrosive medium
Driving modeWorm and worm gear transmission, gas transmission, electrical transmission

Pneumatic multi-layer hard seal butterfly material

Part Namematerials
valve bodyCast iron, stainless steel, chromium molybdenum steel, alloy steel
DiscWCB,Alloy Steel,SUS,CR-MO
seal ringStainless steel and high temperature resistant asbestos panels are combined into multiple layers
valve rod2Cr13、1Cr13stainless steel, chromium molybdenum steel
bearingAustenitic stainless steel, 304 n

Pneumatic multi-layer hard seal butterfly connection dimensions