Pneumatic pneumatic - valve Hard seal butterfly pneumatic valve daily existing problems and solutions

as the country large-scale project construction, make the electric power, petroleum, chemical industry, the number of city supply and drainage system and pneumatic valve is increasing, especially the adjustment of the pneumatic valve dosage is very large, so the user more problems when use it, at this point, the problems are generalizations, and guide the correct installation and use, hope to be of help. Current problems hard seal butterfly pneumatic valve has the following categories: a, 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. 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. Third, because of the principle of triple eccentric structure, pneumatic sealing face of valve plate and seat on drive torque is the sealing between 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. At present, the state of elastic hard seal butterfly pneumatic valve without corresponding special standard of flange, we according to the current national standards, in the case of the standards set by the flange size remains the same, the Canon of the socket type. Flanges diameter and nominal menstruation basic same, this is to increase the effective sealing surface, and to provide favorable and convenient installation, and ensure the normal use of pneumatic valve. Here, to alert users in the use of flexible pneumatic valve, hard seal butterfly pairing of flange must use special flange, particularly with pneumatic valve pressure ring surface matching pipe flange, special flange must be used. Three dimensional partial hardness seal butterfly used in hydraulic pneumatic valve, gas, electric power, metallurgy, chemical industry, municipal and other industries clean or sewage, oil and gas, natural gas, air and other combustible gas pipeline industry, used to cut off or adjust medium flow in.
YAZE( Pneumatic company's main products: pneumatic pneumatic valve pneumatic ball valve pneumatic butterfly valve Keywords: pneumatic pneumatic valve pneumatic pneumatic valve