Metal hard seal eccentric butterfly valve for metal seal structure and seal forms can be divided into: metal to metal seal, can exchange the metal sealing ring to metal seal, stainless steel plate and graphite composite plate sealing ring to metal seal. Hard seal butterfly valve drive form in addition to the electric and manual, worm gear drive, pneumatic, etc. This valve shall generally be installed in the pipeline. Hard seal butterfly valve butterfly plate installed on the diameter of the pipe direction. In hard seal butterfly valve, cylindrical channels in the disc disc around the axis of rotation, rotation Angle for 0 ° ~ 90 °, rotate to 90 °, the valve is fully open. Metal hard seal ball valve, it is used to improve the efficiency of high velocity fluid dissolved gas, which include: the body, into and out of hydraulic valve cover, with flow channel, respectively, in both sides of the body of the product; One internal channel of valve ball, it has in the body of the product; Rotating mechanism, Industrial Valves ball is connected with the product, to make the product valve ball rotation. The rotation of the drive, it used to drive the product agency actions; Its characteristics is also included: leaf wheel mechanism, which in a valve ball channel products, products of impeller institutions include: a variable pitch screw impeller, the product of variable pitch screw impeller pitch into the liquid valve cover from product to product of the liquid valve cover.
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