Ball valve ( 球阀) , opening and closing ( A sphere) Driven by the stem and round ball valve axis rotation movement of the valve. Mainly used for cutting, distribution, and change the flow direction of medium, it just has to rotate 90 degrees of operating and small rotational torque can be closed tightly. Ball valves are widely applied to various occasions, according to different occasions to choose different structure of ball valve, ball Industrial Valves, in accordance with the structure classification with floating ball valve and fixed ball valve. Floating ball valve, ball valve 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 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. This kind of structure, widely used in small diameter of low pressure ball valve. The fixed ball ball Industrial Valves, 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 valve. To reduce the number of ball valve operating torque and increase the reliability of the sealing, appeared 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 Industrial Valves.
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resilient gate valve ductile iron gate valve are primarily used for os gate valve.
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