D343 double eccentric butterfly pneumatic valve - - Soft and hard seal, four fluorine pneumatic valve sealing butterfly

butterfly pneumatic valve USES: double eccentric butterfly pneumatic valve, pneumatic valve is also called high performance butterfly is mainly suitable for water plants, power plants, steel mills, smelting, chemical industry, water source engineering, environmental infrastructure projects such as dewatering system, especially in waterway on the pipeline, used as adjustment and the closure device. Compared with center line butterfly pneumatic valve, pneumatic valve double eccentric butterfly more resistant to high pressure, longer life and good stability. Compared to other pneumatic valve, the larger the diameter the lighter materials, the cost is lower. But because there is the butterfly plate, the flow resistance is big, so less than the adjustment of DN pneumatic valve is of no great significance.
pneumatic valve working principle: double eccentric butterfly butterfly pneumatic valve in single eccentric butterfly valve on the basis of further improvement. Its structure characteristics is in the center of the pneumatic valve stem axis deviation both disc and deviating from the center of ontology. The effect of the double eccentric butterfly plate can immediately after pneumatic valves are open from pneumatic valve seat, greatly eliminates the butterfly plate and pneumatic seat unnecessary phenomenon of excessive extrusion, scratches, reduce the opening distance, reduces the abrasion resistance, improve the pneumatic seat life. Scraping slash, but also makes the double eccentric butterfly pneumatic valve can also use a metal pneumatic valve seat, improves the butterfly pneumatic valve in the field of high temperature applications.
double eccentric butterfly pneumatic valve structure features:
reasonable design, compact structure, easy installation and easy maintenance.
adopts eccentric structure, reduce the friction sealing ring, prolong the service life of pneumatic valve.
completely sealed, zero leakage. Can be used in ultra high vacuum conditions.
replacement pneumatic valve plate sealing ring, disc, shaft, such as material, can be used a variety of medium and different temperature. （ According to hong feng pneumatic valves)