2014年6月11日星期三

Introduction of the pneumatic ball valve

      Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. 
      China Gearboxes manufacturer & supplier, we specialize in: worm reducers, worm gearboxes, planetary gearboxes,cycloidal speed reducers,timing pulleyvariators,helical gear,sprial bevel gears, agricultural gearboxes,marine gearbox, chain couplingtractor gears, truck gears,electric motors,Screw actuators. 
      Our products are used in many different industry sector, like in automation engineering, drive engineering, conveyor technology, assembly and handling technology, packaging industries, the beverage, food and medical engineering, pharmaceutical production, and laboratory equipment.
    Classification
    Floating ball
    Pneumatic ball valve ball is floating, in the medium under pressure, can produce some displacement of the sphere and pressed in the export side of the sealing surface, to ensure the export side seal.
Floating pneumatic ball valve structure is simple, good sealing,but the ball under the load of work all the media to pass the export ring, so to consider the ring material can withstand the work load of the media sphere. This structure, widely used in low-pressure valve.
Basic Rubber Tensioner

Basic Rubber Tensioner

    Fixed ball
     Ball pneumatic ball valve is fixed, after the pressure does notmove. Fixed with a floating ball valve ball valve seat, by the media pressure, the valve seat have a mobile, so that the sealing ring ispressed on the sphere, in order to ensure the sealing. Usually with the ball in the upper and lower shaft with bearings, operating torque, suitable for high pressure and large diameter of the valve.
In order to reduce operating torque and pneumatic valve toincrease the reliability of the seal, the seal ball valve, both the pressure injection of a special lubricant in the sealing surface, to form a layer of film, which enhances the sealing, and reduce operating torque, more suitable for large-diameter high-pressure valve.
    Elastic ball
    Ball pneumatic ball valve is elastic. Ball and valve seat rings are metal materials, sealing pressure than the large, rely on media itself can not seal the pressure has reached the requirementsmust be imposed by external forces. This valve is suitable forhigh temperature and high pressure medium.
Elastic sphere is a flexible open slot in the sphere of the bottom wall, and get flexible. When the closed channel, with the stem of the wedge-shaped head to open up the ball and valve seat to seal compression. Release the ball before turning the wedge-shapedhead, ball the subsequent restoration of the original prototype, theball with a small gap between the valve seat, sealing surface can reduce friction and operating torque.
      Pneumatic ball according to their channels can be divided into straight through position, three links and right angle type. After two kinds of ball valves for distribution of media and change the flow of media.
     

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