ball valve what kind, what are the classification of ball valve? Ball valve is a sphere as closing valves, valve body, valve seat, mainly for the sphere, the valve stem and handle, Or other driving devices, such as: electric actuators, pneumatic actuators or hydraulic actuators) Composition, driven by the stem and round ball valve axis of rotation, in the line is mainly used to do cutting, distribution, and change the flow direction of medium.

for ball valves of various kinds, including the principle and the use of medium and different application places, users should be corresponding condition request to choose different types of ball valve, ball valve types are classified according to the actual working condition. What are the classification of what type ball valve, ball valve? According to the structural form can be divided into: one ball, floating ball valve, ball valve 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 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 ball valve. Second, the fixed ball ball valve ball valve ball is fixed, does not produce mobile after compression. Fixed ball valves have a floating ball valve seat, the medium pressure, mobile 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 the Industrial Valves. To reduce the number of ball valve operating torque and increase sealing degree are available, and again in recent years, oil seal ball valve, 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 high pressure large diameter ball valve. Three, elastic ball ball valve ball valve is elastic sphere. Ball and seat sealing adopts metal materials, sealing pressure is very big, in accordance with the pressure of the medium itself already could not reach the requirements of sealing, must exert external forces. This valve is 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, sphere rolling out with stem wedge-shaped head pressure to seal with the valve seat. Wedge head before you turn the sphere are released, the sphere then restore the original prototype, appear very small gap between the sphere and valve seat, can reduce the sealing surface friction and operating torque. What are the classification of what type ball valve, ball valve? Classification method has the following kinds: common ball valve size: according to the pressure of high pressure ball valve, medium pressure ball valve, low pressure ball valve by flow type: full size ball valve, reducing valve position according to the passage: cut-through, three general formula, right Angle according to the temperature, high temperature ball valve, ball valve under normal temperature, low temperature ball valve, cryogenic valves according to sealing form: soft sealing ball valve, hard seal ball valve by valve stem assembly: jacket type ball valve, side mounted ball valve: the form of the connection flange ball valve, welding ball valves, threaded ball valve, clamp ball valve according to the drive mode: manual ball valve, automatic control valve ( Pneumatic ball valves, electric ball valves, hydraulic ball valve) According to the diameter size: large caliber ball valve, large diameter valves, diameter of ball valve, small ball valve
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The trend toward using os gate valve double flanged gate valve to ease resilient gate valve, once established, soon extended into such additional fields as cast iron valve and os&y gate valve.