Pneumatic ball valve according to the classification of structure form

pneumatic ball valve can be divided into the form of the structure of a pneumatic valve, pneumatic ball valve floating ball ball ball is floating, under the effect of medium pressure, the fitness ball produce certain displacement and compression at the outlet seal surface, guarantee the outlet seal. Floating ball ball pneumatic valve has simple structure, good sealing, but all spheres of work under medium load to export seal, therefore should consider to seal material can withstand sphere medium working load. In this structure, it is widely used in low pressure pneumatic ball valve. Second, the fixed ball ball pneumatic valve pneumatic valve ball is fixed, does not produce mobile after compression. Fixed ball pneumatic ball valve with floating pneumatic valve seat, after the medium pressure, mobile pneumatic valve seat, make the seal compression on the ball, to ensure the seal. Usually mounted on the upper and lower shaft with ball bearing, the operating torque is small, suitable for high pressure and large diameter of pneumatic valve. To reduce the number of pneumatic ball valve operating torque and increase the reliability of the sealing, pneumatic valve oil seal ball appeared again in recent years, both betting special lubricant between the sealing surface, in order to form a layer of oil film, which increases the sealing, and reduce operating torque, suitable for pneumatic ball valve with high pressure, large diameter. Three, elastic ball ball pneumatic valve pneumatic valve ball is elastic. Sphere and pneumatic seat sealing adopts metal materials, sealing pressure is very big, relying on the pressure of the medium itself already could not reach the requirements of sealing, must exert external forces. This kind of pneumatic valves are suitable for high temperature and high pressure medium. Elastic ball is on the lower end of the sphere wall open one elastic slot, and elasticity. When close the channel, using pneumatic stem wedge-shaped head make the ball rolling out with pneumatic pressure to seating. Wedge head before you turn the sphere are released, the sphere then restore the original prototype, appear very small gap between the sphere and the pneumatic valve seat, can reduce the sealing surface friction and operating torque. Pneumatic ball valve position according to the channel can be divided into straight-through, three general formula and right Angle type. Two ball after pneumatic valve used for distribution of medium and change the flow of medium.