The structural characteristics and working principle of vacuum pneumatic valves ( 2)

vacuum control characteristics of pneumatic valve:, trays and short middle type steel plate welded structure, structure design and manufacture of new, compact structure, light weight, easy installation, small flow resistance, high turnover rate, avoid, easy to operate high inflation. The rod, bolts, reliable quality, long service life. For on-site installation, free flow of media. Purpose: this is a non pneumatic butterfly valve pneumatic sealing butterfly valve, widely used in building materials, metallurgy, mine, electric power and the temperature of the media in the process of production ℃ or less pressure rating. MPa is used for other types of pipe and connection, open and close or adjusting medium quality. Features: with the center line and short form steel plate welded structure, structure design and manufacture of new, compact structure, light weight, pneumatic valve plate, convenient installation, small flow resistance, high turnover rate, avoid, easy to operate high inflation. Inside connecting rod bolt, reliable quality, long service life. For on-site installation, free flow of media. How it works: the pneumatic valve actuator driven by motor, make easy, free rotation in ° or regulate the opening and closing ceremonies of the media, in order to achieve the purpose of flow. At present, the lining butterfly pneumatic valve, pneumatic valve line with rubber butterfly used to implement the line as a system fault and flow control components, has been used in petroleum, chemical industry, metallurgy, water, electricity, has been very widely used in many areas. In pneumatic butterfly valve has publicly technology, its sealing form sealing structure, sealing materials for rubber, ptfe etc. As the limit characteristics of the structure is not suitable for high temperature, high pressure, corrosion resistance, abrasion resistance, resistance, etc. Existing a more advanced control pneumatic valve is triple eccentric metal hard seal butterfly valve, pneumatic valve and pneumatic seat components, pneumatic valve seat sealing surface layer welding heat resistance, corrosion resistant alloy material. Multilayer soft fold in pneumatic valve plate retaining ring, the traditional high temperature, convenient operation, opening and closing without friction, the relatively closed butterfly pneumatic valve actuator torque increases to compensate for sealing, improve the pneumatic butterfly valve sealing performance and prolong the service life of the advantages. A vacuum pneumatic valves are still in the process of the following questions:, hard and soft fold type sealing ring on the pneumatic valve plate, when the pneumatic valve plate normally open state formation of erosion in front of the sealing surface of the medium soft seal sealing performance has a direct effect of sandwich sheet metal brushing your teeth. Structure of structural constraints, do not accord with the following pneumatic valve DN diameter, thick because of CD, the overall structure of the flow resistance is big. , due to the principle of rubber lining butterfly pneumatic valve, pneumatic pneumatic seat sealing surface of valve plate and seal on the torque transmission between the pneumatic valve board seats. Is flow state, the higher the medium pressure seal compression tight. With medium pressure pneumatic valve plate and seat unit pressure shelter-forest flow ratio between the medium pressure, sealing began to leak. In the ventilation characteristics of pneumatic valve: high-performance pneumatic seat ring of the soft soil layer description of t-shaped sealing ring on both sides of the stainless steel sheet.
pneumatic valve plate and for the oblique cone structure, pneumatic valve seat sealing surface, in the pneumatic valve plate oblique cone surface welding heat resistance, corrosion resistant alloy material; Between the ring plate and the adjusting screw fixed leaf spring assembly structure adjustment. This structure effectively compensation between the collar and pneumatic valve stem in the central and elastic deformation under pressure, to solve the sealing problems in communication in the process of the transmission medium of two ventilation valve tolerance.
in both by the T - Soft stainless steel plate of polycyclic, with metal sealing and soft sealing both low and high temperature under the condition of double advantage, both sides with zero leakage sealing performance. Trials show that pool is flow state ( The medium flow direction at the same rotating direction) , the sealing surface pressure is medium pressure and torque transmission effect of pneumatic valve plate. Positive media pressure pneumatic valve plate oblique cone surface and pneumatic valve seat sealing surface squeezed tight, sealing the better the results.
reflux, pneumatic valve plate and seat between the drive torque of pneumatic valve plate to the pneumatic seat tightness. As reverse medium pressure, pneumatic valve plate and the positive pressure pneumatic seat between units is less than the medium pressure, depending on the load adjusting ring in the spring, to make up for in to the pressure of pneumatic valve plate and seat stored in the sealing surface deformation by automatic compensation effect.
so the utility model is not like the existing technology, in the pneumatic valve plate installed on the hard and soft multi-layer sealing ring, but is installed directly on the body, in the middle of the clamp and pneumatic seat add adjustable ring is a two-way sealed very good method. It can replace the pneumatic valve, pneumatic ball valve.