Butterfly vacuum pneumatic valve products to the structure properties of simple analysis

vacuum butterfly pneumatic valve is in the chemical industry, building materials, power plant, glass and other ventilation, environmental engineering, and the dust in the air cooling or hot air in the gas pipeline, a gas medium flow adjusting or cut off the configuration of the device.
butterfly vacuum pneumatic valve to the product characteristics as follows:
. Adopted the midline type disc plate and short structure is a new type of structure design and manufacture of the steel plate welding, compact structure, light weight, easy installation, small flow resistance, big circulation, avoid the influence of high temperature expansion, convenient operation.
。 No the connecting rod, bolts, etc. , reliable operation, long service life. Can be installed in a transfer, not affected by the medium flow direction.

the structure characteristics of vacuum pneumatic valve adjustment: the middle type disc plate and short structure, a new type of structure design and manufacture of the steel plate welding, compact structure, light weight, easy installation, small flow resistance, big circulation, avoid the influence of high temperature expansion, convenient operation. The body without connecting rod, bolts, etc. , reliable operation, long service life. Can be installed in a transfer, not affected by the medium flow direction.
but vacuum butterfly pneumatic valve in use process there are still some problems:
. Due to multi-layer soft fold type sealing ring 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.
。 Restricted by structure condition of 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.
。 The principle of the line with rubber butterfly pneumatic valve, pneumatic valve plate between the sealing surface and pneumatic valve seat seal is to rely on actuator torque pneumatic valve plate pressure to the pneumatic valve seat. Is flow state, the higher the medium pressure seal compression 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.
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. It will replace the brake pneumatic valve, pneumatic valve and ball.