fluorine lining gate valve

How to quickly recognize all types of ball valves?

by:Lianke Valve     2022-08-02
We all know that the ball valve has a very simple structure and is easy to install. It is not only used for liquid blocking but also gas blocking, and the sealing surface and spherical surface are always in a sealed state, so it is not easy to be corroded by the medium. , greatly improving the service life. Next, I will tell you how much the ball valve family has. Classification of ball valves: Function classification: 1. Bypass valve: The ball valve is generally opened in still water, so the bypass valve is set to be flat pressured first, that is, the two sides are filled with water; 2. Air valve: When water is filled, the valve will be closed by itself after removing the air and taking the buoy. ; When draining water, the buoy is used to supplement the air, and the buoy will go down by itself; 3. Pressure relief valve: When opening and closing the valve, the pressure water between the valve and the sealing cover is removed to avoid the wear of the sealing cover; sewage. Transmission classification: 1. Pneumatic ball valve 2. Electric ball valve 3. Hydraulic ball valve 4. Pneumatic-hydraulic ball valve 5. Electro-hydraulic ball valve , V-shaped ball valve, three-way ball valve, stainless steel ball valve, floating ball valve, cast steel ball valve, forged steel ball valve, ash discharge ball valve, anti-sulfur ball valve, pneumatic ball valve, electric ball valve, ferrule ball valve, welded ball valve. According to the structure, it can be divided into: A. 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 structure of the floating ball valve is simple and the sealing performance is good, but the load of the ball bearing the working medium is all transferred to the outlet sealing ring. Therefore, it is necessary to consider whether the material of the sealing ring can withstand the working load of the ball medium. , the sphere may be offset. Generally used for medium and low pressure ball valves. B. 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 in recent years. 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. , more suitable for high-pressure and large-diameter ball valves. C. 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. According to the channel position, it can be divided into: straight-through type three-way type right-angle type The above content is to tell us the members of this big family of ball valves. Either way he has the right members. Therefore, it is suitable for many aspects, and it is normal that it will be widely used by people. The use of different ball valves in different fields has also helped people to improve a lot of efficiency in the industry.
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