日韩在线中出_国产伦精品一区二区三区视频我_免费裸体视频网_顶级嫩模啪啪呻吟不断好爽_国产精品久久99精品毛片三a_男人裸j照无遮挡男_同桌捏我胸啊嗯～出水了小说_日本女优裸体艺术_欧美精品一区二区三_国产一区色

Pneumatic ball valve is composed of ball valve pneumatic actuators, pneumatic actuators are divided into double-acting pneumatic actuators and single-acting pneumatic actuators, controlled by electromagnetic valve, ball valve switch action. Pneumatic ball valve can realize intelligent control, quickly open or close the pipeline, can effectively control and manage the network.
The ball valve is mainly used in the pipeline to cut off, distribute and change the flow direction of the medium. It only needs to operate with a rotation of 90 degrees and a small rotational moment can be closed tightly. Ball valves are best suited for switching and cutting valves, but recent developments have designed the ball valve to be used for throttling and controlling flow, such as V ball valves.
Application of pneumatic ball valve:
Ball valve itself, compact structure, reliable sealing, simple structure, convenient maintenance, sealing surface and the spherical often in the closed state, not easily be medium erosion, easy operation and maintenance, applicable to water, solvent, acid and gas, such as general work medium, but also is suitable for the working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene, widely used in various fields. Ball valve body can be integral, can also be group type.
Features of pneumatic ball valve:
Pneumatic ball valve is mainly used to cut or connect line in the medium, can also be used for flow regulation and control, compared with other type valve, pneumatic ball valve has a quarter-turn output torque, start quickly, stable and reliable, and is used widely, such as the following several advantages.
1. Small fluid resistance and pneumatic ball valve are the least resistance of fluid resistance in all valve classifications. Even the diameter pneumatic ball valves have relatively small fluid resistance.
2. The thrust bearing reduces the friction torque of the stem, allowing the stem to operate smoothly and flexibly for a long time.
3. The seat sealing performance is good, the sealing ring made of polytetrafluoroethylene and other elastic materials is used, the structure is easy to seal, and the valve sealing ability of the pneumatic ball valve increases with the increase of the pressure of the medium.
4. The stem seal is reliable, because the stem can only act as if it is transported without doing the lifting movement. The packing seal of the stem is not easily damaged, and the sealing capacity increases with the pressure of the medium.
5. Due to the good self-lubrication of ptfe and other materials, the friction loss of the ball is small, so the service life of the pneumatic ball valve is long.
6. The lower lever and stem head are raised to prevent stem ejection. If a fire causes stem seal damage, metal contact can be formed between the convex and valve body to ensure the stem seal.
7. Anti-static function: the spring can be set between the ball, stem and valve body to produce static electricity generated by the switch process.