The pneumatic ball valve is a gate valve that uses a ball with an annular keyway as the opening and closing part. The ball rotates with the valve seat to complete the opening and closing posture. The pneumatic ball valve is the key to disconnect on the pipeline. Distribute and change the material flow position. The gate valve only needs It can be turned off tightly with a 90-degree operation method and a small rotation torque. The thorough and fair inner wall of the oil circuit board gives the material little frictional resistance and direct flow passage.
The gate valve is not only simple in structure, good in sealing function, and small in size within a certain rated diameter range, light in weight, low in raw material consumption, small in installation specifications, and small in driving torque, simple in actual operation. It is easy to meet efficient opening and closing, It is easy to use and repair. It can be used for general working substances such as strong electrolyte, organic solvent, acid and gas, and it is also suitable for substances with extreme working conditions, such as O2, hydrogen peroxide, methane gas and ethylene.
The main features of pneumatic ball valves are:
1. Pneumatic ball valve has small liquid resistance and low fluid density (in fact, zero). Pneumatic ball valve generally has two structures: reduced diameter and full pipe diameter. Regardless of the structure, the fluid density index of the pneumatic ball valve is relatively small. Especially the gate valve of the full total flow type, that is, the pipe diameter, because the safety channel diameter is equivalent to the pipe inner diameter, part of the frictional resistance damages only the frictional resistance of the steel pipe of the same diameter, that is, in all gate valves, this type of pneumatic ball valve The fluid density is the least.
2. The opening and closing of the pneumatic ball valve is fast and convenient, because the gate valve can be opened or closed only by rotating the rocker 90° under normal conditions, and it is very easy to complete efficient opening and closing. It can maintain efficient opening and closing, and the opening time of some structures is only 0.05-0.1s to ensure that it can be used in the automation technology of the experimental bench. When the gate valve is opened and closed quickly, the actual operation has no impact.
Related introduction features of pneumatic ball valve
3. Pneumatic ball valves have good sealing function. At this stage, most of the valve balls of pneumatic ball valves are also produced with ductile materials such as PTFE. The sealing pair of metal materials and polymer materials is generally called soft. Tightness. Generally speaking, the tightness of soft sealing is easy to ensure, and the processing precision and precision of the sealing surface are not very high.
4. Pneumatic ball valve has a long service life, because PTFE has excellent self-wetting properties, and the sliding friction with the triangular prism is small, and because of the improvement of the ball manufacturing process, the hardness is reduced, thereby enhancing the service life of the gate valve . According to the life test of the gate valve carried out by Shouye Valve Company in the experimental room, the frequency of power switching reached 10,000 times.
5. The spherical shut-off piece can be automatically and accurately positioned on the part, and can bear the pressure difference when shutting down.
6. In a relatively large working pressure and temperature range, it can achieve complete double sealing.
7. When fully open and fully closed, the convex surface of the ball and the high-pressure gate valve is isolated from the medium, so it is not easy to cause the corrosion of the convex surface according to the material of the gate valve.