Chip Ball Valve

by:Lianke Valve     2022-08-09
Distinguish from the structure One-piece ball valve is one-piece, which is composed of ball, PTFE ring and lock nut. The diameter of the ball is slightly smaller than the diameter of the pipeline, similar to the wide-type ball valve. The two-piece ball valve is composed of two parts, and the sealing effect is better than that of the one-piece ball valve. The diameter of the ball is the same as that of the pipeline, and it is easier to disassemble than the one-piece ball valve. The three-piece ball valve is composed of three parts, the valve cover on both sides and the middle valve body. The difference between the three-piece ball valve and the two-piece ball valve and the one-piece ball valve is that it is easy to disassemble and maintain. In terms of pressure, the pressure resistance of the three-piece type is much higher than that of the one-piece and two-piece ball valves. The outer side of the main three-piece ball valve is fixed by four bolts, which plays a very good tightening role. The precision casting valve body can reach a pressure of 1000psi≈6.9MPa. Higher pressures require forged valve bodies. The ball valve can be divided according to the structure: 1. Floating ball valve: The ball of the ball valve is floating. Under the action of the medium pressure, the ball can produce a certain displacement and be pressed on the sealing surface of 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 bearing the working medium is all transferred to the outlet sealing ring, so it is necessary to consider whether the sealing ring material can withstand the working load of the ball medium. This structure is widely used in medium and low pressure ball valves. 2. 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 being pressurized by the medium, the valve seat moves, so that the sealing ring is tightly pressed on the ball to ensure the sealing. Bearings are usually installed on the upper and lower shafts with the ball, and the operating torque is small, which is 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-sealed ball valves have appeared, and special lubricating oil is injected between the sealing surfaces to form an oil film, which not only enhances the sealing performance, but also reduces the operating torque. caliber ball valve. 3. Elastic ball valve: The ball of the ball valve is elastic. Both the ball and the valve seat sealing ring are made of metal materials, and the sealing specific pressure is very large. The pressure of the medium itself cannot meet the sealing requirements, and external force must be applied. This valve is suitable for high temperature and high pressure medium. The elastic sphere is obtained by opening an elastic groove at the lower end of the inner wall of the sphere to obtain elasticity. When closing the channel, use the wedge head of the valve stem to expand the ball and press the valve seat to achieve sealing. Before turning the ball, loosen the wedge head, and the ball will return to its original shape, so that there is a small gap between the ball and the valve seat, which can reduce the friction and operating torque of the sealing surface. The ball valve can be divided into straight-through type, three-way type and right-angle type according to its channel position. The latter two ball valves are used to distribute the medium and change the flow direction of the medium.
Most people who see a in operation for the first time are amazed at how well the types of industrial valves is managed.
All of the long-term strategies and short-term actions of Lianke Valve will be molded by a set of core values that are shared by each and every associate.
Lianke Valve Co.,Ltd. has great reputation with an excellent selling record for fulfilling customer's satisfaction.
Custom message
Chat Online 编辑模式下无法使用
Chat Online inputting...