Ball valve Daquan: floating, fixed, hard seal, V-type, heat preservation, pipeline, clamp, track, tee, internal thread, low temperature, eccentric ball valve
First, the floating ball valve The ball of the ball valve is floating. Under the action of the medium pressure, the ball can generate a certain displacement and press against the sealing surface at the outlet end to ensure the sealing of the outlet end. The floating ball valve has a simple structure and good sealing performance, but the load of the ball subjected to the working medium is all transmitted to the outlet sealing ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the spherical medium. This structure is widely used in medium and low pressure ball valves. Second, fixed ball valve The ball of the ball valve is fixed and does not move after being pressed. The fixed ball valve has a floating valve seat. After the medium pressure, the valve seat moves, so that the sealing ring is pressed against the ball to ensure the seal. Usually mounted on the upper and lower shafts of the ball, the operating torque is small, suitable for high pressure and large diameter valves. In order to reduce the operating torque of the ball valve and increase the reliability of the seal, oil seal ball valves have appeared in recent years, and the special lubricating oil is injected between the sealing faces to form an oil film, which enhances the sealing performance and reduces the operating torque. It is more suitable for high pressure and large diameter ball valves. Third, the elastic ball valve The ball of the ball valve is elastic. Both the ball and the seat ring are made of metal material, and the sealing pressure is very large. The pressure of the medium itself cannot meet the sealing requirements, and an external force must be applied. This valve is suitable for high temperature and high pressure media. The elastic sphere is made by opening an elastic groove at the lower end of the inner wall of the sphere to obtain elasticity. When the passage is closed, the wedge of the valve stem is used to open the ball and press against the seat to seal. Before the ball is rotated, the wedge head is loosened, and the ball is restored to its original shape, so that a small gap occurs between the ball and the valve seat, which can reduce the friction and operating torque of the sealing surface. Ball valves can be divided into straight-through, three-way and right-angle types according to their channel positions. Three-way and right-angle ball valves are used to distribute the medium and change the direction of the medium.
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Flower Type Operating Light,Operating Room Lights,Petal Led Surgical Lights,Petal Type Led Surgical Lights Shandong qufu healthyou Medical Technology co.,Ltd , https://www.kangerjian-medical.com Ball valve Daquan: floating ball valve, fixed ball valve, hard sealing ball valve, V ball valve, thermal ball valve, pipeline ball valve, wafer ball valve, track ball valve, top loading ball valve, pigging valve, forged steel ball valve, three-way ball valve, internal thread ball valve , integral ball valve, cryogenic ball valve, bellows ball valve, eccentric hemisphere valve, all welded ball valve, special ball valve
Ball valves can be divided into 19 categories, including floating ball valves, fixed ball valves, metal hard seal ball valves, V-type ball valves, wafer ball valves, thermal ball valves, pipeline ball valves, track ball valves, top-loading ball valves, pigging valves, high-pressure forged ball valves, Three-way (four-way) ball valve, internal thread ball valve, integral ball valve, low temperature ball valve, bellows ball valve, eccentric hemisphere valve, all welded ball valve, special ball valve, etc.
Ball valves are available in a wide range of applications , and ball valves are available for:
1. The nominal diameter is from 8mm to 1200mm.
2. The nominal pressure is from vacuum to 42 MPa.
3. Working temperature is from -204 °C to 815 °C.
The ball valve can be divided according to the structure:
