Pneumatic pneumatic - valve The characteristics of the double eccentric hemisphere pneumatic valve

as industrial development, the pneumatic ball valve, in particular, the demand of high temperature and high pressure condition of pneumatic ball valve is more and more big, the required pneumatic ball valve has wear-resisting, scouring resistance, high temperature resistant and corrosion resistant performance is higher. And traditional full size ball although pneumatic valve, pneumatic valve seat through its surfacing welding, spraying technology of surface hardening treatment, but its service life, cost and performance still cannot satisfy the use requirement, such as industrial silicon, coal chemical, blast furnace gas, gas and other harsh working conditions. Double eccentric hemisphere pneumatic valve is learned the different structure of the pneumatic ball valve, V pneumatic valve and track the ball valve and other advantages to develop new products. Pneumatic ball valve adopts double eccentric sealing structure, wear small, small torque and good sealing performance, long service life. Pneumatic seat and half sphere with special hardening process, especially to adapt to the harsh working conditions is resistant to wear and tear, scouring resistance, corrosion resistance, high temperature resistant requirements. One and a half, structural characteristics, a sphere of double eccentric hemisphere pneumatic valve half sphere with double eccentric design, reliable sealing effect, instantaneous release, torque is small, long service life. Can be used in the harsh conditions of transport granule medium. Its structure principle is half sphere center line and pneumatic valve stem centerline offset size, line offset with the pneumatic valve seat size, wide open sphere with the pneumatic valve seat off completely, and there is a certain gap, radius of gyration is divided into long radius and short radius, in long radius turn the trajectory of the tangent and pneumatic valve seat sealing surface to form a theta Angle, in the pneumatic valve opening and closing, hemisphere relative pneumatic valve seat surface has a fading out from and gradually into the effect of extrusion, which reduces the opening and closing the pneumatic seat between the hemispheres and mechanical wear and scratches, improve the service life. , pneumatic seat ( Pneumatic valve seat adopt floating design, reduces the processing difficulty, ensure that the center line of the pneumatic valve seat with a half sphere of spherical center overlap, thus improve the sealing performance. Pneumatic seat with pneumatic valve clearance, using half a sphere position during assembly can automatically find the midline, guarantee the pneumatic valve seat sealing surface contact with half sphere spherical, solve the error caused by leakage due to machining accuracy, improve the use of pneumatic ball valve performance and life. ( Pneumatic seat with pneumatic seal between the valve body adopts hard seal structure, suitable for high temperature and high pressure conditions. Pneumatic and pneumatic valve seating contact dimension c value is small, each sealing surface accuracy requirement is high, when assembling, retainer with electric impact wrench installation, is not only a retainer engages with pneumatic valve body, prevent loose, and it is pneumatic seat friction rotation, in line with the mechanical vibration meshing principle, reliable sealing pneumatic seat and aerodynamic body. ( Pneumatic valve seat and half sphere with the pneumatic valve and pneumatic valve seat adopts two hard seal, therefore the pneumatic valve can be used in high temperature and high pressure conditions. Overall, other parts of pneumatic valve adopts modular design, simple structure, good reliability, high universality. Pneumatic valve rod using the jet structure. Drive mode diversification, pneumatic valve stem, bracket and connection of the actuator size comply with ISO standards, can be directly with various specifications actuators piece together. Commonly used driving mode has manual, pneumatic, hydraulic, electric and gas liquid linkage, thereby improve the performance of double eccentric hemisphere pneumatic valve use. Second, the scope of using double eccentric hemisphere pneumatic valve with pneumatic valve is suitable for all kinds of common industry demands, such as water, sewage, waste water, steam, gas, pulp and other media. If the seal the Cr - Mn- Si carbide and fireproof, explosion protection and anti-static function, is suitable for high temperature medium in requirements, such as gas, coke oven gas, water gas and natural gas, etc. If the seal ( Hemispheroid, pneumatic seat and pneumatic valve port through tungsten carbide special craft processing, has high efficiency and energy saving, good abrasion resistance, reliable sealing performance, convenient operation, opening and closing fast, long life and other advantages, is the industrial silicon industry choice of using pneumatic valve in the pipeline. Because of its half sphere and pneumatic seat in an instant from and instantaneous pressure characteristics, suitable for medium containing particles of harsh working conditions, can be widely used in metallurgy, mineral processing, the power of pulverized coal in the production process, such as the coal pulverizing system and the cleaning of all kinds of line control. In the process of instant detachment and instantaneous pressure, half sphere dissectible role with the pneumatic valve seat can remove scale and adhesive on the surface of the seal, can ensure reliable sealing tightness. Precipitation is conveying easy scaling, the precipitation crystallization solution slurry and slurry ash two-phase mixture fluid medium in the process with choice of pneumatic valve. At present, the double eccentric hemisphere various specifications of pneumatic valve has been applied in different industries on various projects, good effect, and gradually expand the scope of use.
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