The problems existing in the pneumatic valve fluorine-butterfly butterfly 3)

fluorine-butterfly butterfly of pneumatic valve use there is what problem? One, due to multi-layer soft fold type sealing ring fixed on the pneumatic valve plate, when the pneumatic valve plate normally open state media on the sealing surface to form positive scour, soft sealing strip of metal sandwich after flushing, directly affect the sealing performance. Second, restricted by structure conditions the structure does not adapt to do diameter DN pneumatic valves, the following reason is pneumatic valve plate overall structure is too thick, large flow resistance. Three, the principle of the line with rubber butterfly pneumatic valve, pneumatic sealing face of valve plate and seat sealing between by actuator torque pneumatic valve plate pressure to the pneumatic valve seat. Is flow state, pipe clamp, pneumatic valve, pneumatic valve fluorine-butterfly, the higher the exhaust pressure pneumatic valve medium sealing squeezing tight. When the countercurrent flow medium pneumatic valve plate and with the increase of medium pressure pneumatic seat unit is less than the pressure medium, the positive pressure between seal began to leak. Four, high-performance pneumatic valve fluorine-butterfly butterfly, whose character is: pneumatic seat sealing described by soft t-shaped sealing ring on both sides of the multi-layer pieces of stainless steel. Pneumatic valve plate and seat sealing surface for the oblique cone structure, in the pneumatic valve plate oblique cone surface welding heat resistance, corrosion resistant alloy material; Fixed between the adjusting ring clamp spring together with the clamp on adjusting bolt assembly structure. This structure can effectively compensate the body between the collar and pneumatic tolerance zone and pneumatic valve stem under medium pressure elastic deformation, solved the pneumatic valve in the two-way exchange medium sealing problems exist in the process of delivery. Soft T on both sides of the multi-layer stainless steel pieces of sealing ring, with metal sealing and soft sealing the dual advantages of under low temperature and high temperature circumstances, all with zero leakage sealing performance. Trials show that pool is flow state ( Medium flow direction is same as the rotation direction of the butterfly plate) , the sealing surface pressure is the drive torque and the medium pressure in the role of the pneumatic valve plate. Positive pressure medium pneumatic valve plate oblique cone surface and pneumatic valve seat sealing surface squeezed tight, sealing the better the results. When the current state, pneumatic valve plate and seat sealing between by the drive torque pneumatic valve plate pressure to the pneumatic valve seat. , with the increase of reverse medium pressure pneumatic valve plate and the positive pressure pneumatic seat between units is less than the medium pressure, colloid mill mulser filter adjustable ring after the loading of the spring deformation energy stored by compensation pneumatic valve plate and valve seat sealing surface of the tight pressure automatic compensation effect. So the utility model is not like the existing technology, soft hard multi-layer sealing ring, installed in the pneumatic valve plate directly installed on the pneumatic valve body, in the middle of the clamp and pneumatic seat add adjustable ring is the ideal way of two-way hard seal. Keywords:
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