Small ball pneumatic valve product knowledge

Overview



pneumatic valve in the oil, chemical, metallurgical and other industries and urban central heating has been widely used. However, as the polymer ptfe sealing materials, ball cannot be used for temperature higher than the ℃, medium for the condition of small particles. For sealing pneumatic valve sealing metal materials, the rotation of the ball will lead to different structure. Such as metal flexible seat structure, due to the elastic pneumatic seat too much friction between the ball and without the formation of such gaps. The float pneumatic valve pneumatic seat seal and pneumatic valve seal between the floating metal structure is not easy. Soften the ball combination sealing structure, components and more complex, increasing the processing difficulty and manufacturing cost, especially in small diameter seal pneumatic valve, this structure is clearly do not apply. After a great deal of analysis and test, with the help of CAD, successfully developed a single eccentric CAM QH stationary seal pneumatic valve seat. Work

eccentric CAM one ball relative to the center line of body centerline offset single seat of A, B, the eccentricity of the pneumatic valve seat sealing surface bay when pneumatic ° O point clockwise around the stem, and then put the ball in yingzhou ° rotating, and with the pneumatic valve seat sealing surface, when the match between the sealing and packing, the dry friction torque is bigger than the medium between the pressure form the moment of friction torque, pneumatic valve will achieve reliable seal. Due to the eccentric CAM pneumatic valve sealing structure, when the pneumatic valves open, the ball quickly from pneumatic valve seat sealing surface. Pneumatic valve is closed, the ball quickly with pneumatic valve seat sealing surface. The purpose of the opening ceremony of the torque is small, closed tightly. Structure characteristics,

small pneumatic valve body cavity narrow space is usually a structural design, do not apply. Therefore, by machining a short axis unit dry by the end of the year, both top and bottom flat ball groove, hole, a ball up and down the bottom of the fixed connection hole, limits the role in the field of freedom, and balance the body cavity and that of the media room. Slot, and flat to dry, from the handle transfer torque.

manufacturing process of the coaxial two areas and scope relative to body size tolerance of eccentric hole center line of the center line of more stringent requirements, general need or nc boring machine. Pneumatic valve seat sealing surface and the ball before assembly shall provide decent, and then placed in the closed position when the ball left pneumatic valve installation, adjustment gaskets, tighten the screws, not static pressure irrigation, the pneumatic valve can guarantee in the sealing of sealing test. Conclusion

small ball pneumatic valve pneumatic valve structure and the existing length is consistent, both at home and abroad standards, the connection forms and sizes on pneumatic valve, not only is the single-phase medium conveying gases or liquids, can also be applied to gas, a mixture of liquid medium and mud mixture liquid medium. The pneumatic valve has been applied to metallurgy, textile, oil industry, the effect is good.