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Electric Ball Valve

Aug 01, 2017

                The electric ball valve is the valve which rotates according to the valve stem's axis in this movement form, is mainly used for truncating or connecting the medium in the pipeline, and is widely used in many fields. What are the types of electric ball valves? The following small series on the specific introduction of the electric ball valve classification, hope to help everyone.

                Electric ball valve classification: Electric ball valve types are: floating ball valve, fixed ball valve, track ball valve, V-type ball valve, tee ball valve, stainless steel ball valve, forged steel ball valve, ash ball valve, sulfur-resistant ball valve, tee ball valve, pneumatic ball valve, electric ball valve, card set ball valve, welding ball valve, flange ball valve, wire ball valve.Ball Valve

                Floating ball: Ball valve of the sphere is floating, under the action of medium pressure, the sphere can produce a certain displacement and tight pressure on the outlet end of the seal surface, to ensure that the export end seal. Floating ball valve structure is simple, good sealing, but the ball bearing the working medium of all the load to the export seal ring, so to consider whether the sealing ring material can withstand the working load of the ball media, in the high pressure impact, the sphere may be offset. This structure is commonly used in medium and low pressure ball valves.Ball Valve

                Fixed ball: Ball valve sphere is fixed, under pressure does not produce movement. Fixed ball valve with floating seat, under the pressure of the media, the seat is moved, so that the sealing ring is tightly pressed on the sphere to ensure sealing. Bearings are usually installed on the upper and lower axes of the sphere, with small operating torque, suitable for high pressure and large caliber valves. In order to reduce the operating torque of the ball valve and increase the reliability of the seal, lubricating oil to form a layer of oil film, that is, enhance the tightness, and reduce the operating torque, more suitable for high-pressure large caliber ball valve.

                Elastic ball: Ball valve sphere is elastic. Ball and valve seat seals are made of metal materials, sealing pressure is very large, depending on the pressure of the medium itself has not reached the requirements of the seal, must exert external force. This valve is suitable for high temperature and high pressure medium. The elastic sphere is elastic by opening an elastic groove at the lower end of the inner wall of the sphere. When the channel is closed, the wedge-shaped head of the stem is used to tighten the ball up and the seat is pressed to seal. Before turning the sphere, loosen the wedge-shaped head, the sphere then restores the original prototype, so that there is a small gap between the sphere and the seat, which can reduce the friction of the seal surface and the operating torque.Ball Valve