The working principle of pneumatic ball valve is to make the valve smooth or blocked by rotating the valve core. The pneumatic ball valve has the advantages of light switch and small volume. It can be made into a large diameter, reliable sealing, simple structure and convenient maintenance. The sealing surface and spherical surface are often closed and are not easy to be eroded by the medium. It is widely used in various industries.

氣動球閥和旋塞閥是同屬一個類型的閥門，只有它的關閉件是個球體，球體繞閥體中 心線作旋轉來達到開啟、關閉的一種閥門。

Pneumatic ball valve and plug valve belong to the same type of valve. Only its closing part is a ball. The ball rotates around the center line of the valve body to open and close.

氣動球閥在管路中主要用來做切斷速度快、分配和改變介質的流動方向。氣動球閥是近年來被廣泛采用的一種新型閥門，它具有以下優點：

Pneumatic ball valve is mainly used to cut off fast, distribute and change the flow direction of medium in the pipeline. Pneumatic ball valve is a new type of valve widely used in recent years. It has the following advantages:

1． 流體阻力小，其阻力系數與同長度的管段相等。

1. The fluid resistance is small, and its resistance coefficient is equal to that of the pipe section with the same length.

2． 結構簡單、體積小、重量輕。

2. Simple structure, small volume and light weight.

3． 緊密可靠，目前球閥的密封面材料廣泛使用塑料、密封性好，在真空系統中也已廣泛使用。

3. Tight and reliable. At present, plastic is widely used as the sealing surface material of ball valve, with good sealing performance. It has also been widely used in vacuum system.

4． 操作方便，開閉迅速，從全開到全關只要旋轉90°，便于遠距離的控制。

4. It is easy to operate and open and close quickly. It only needs to rotate 90 ° from full open to full close, which is convenient for remote control.

5． 維修方便，氣動球閥結構簡單，密封圈一般都是活動的，拆卸更換都比較方便。

5. Convenient maintenance, simple structure of pneumatic ball valve, generally movable sealing ring, and convenient disassembly and replacement.

6． 在全開或全閉時，球體和閥座的密封面與介質隔離，介質通過時，不會引起閥門密封面的侵蝕。

6. When fully open or fully closed, the sealing surface of the ball and valve seat is isolated from the medium. When the medium passes through, it will not cause the erosion of the valve sealing surface.

7． 適用范圍廣，通徑從小到幾毫米，大到幾米，從高真空至高壓力都可應用。

7. It has a wide range of applications, ranging from small diameter to a few millimeters and large diameter to a few meters. It can be applied from high vacuum to high pressure.

8. 因為氣動球閥動力源采用的是氣體，一般為0.2-0.8MPa壓力，相對比較安 全。氣動球閥如果漏氣的話，相對液動、電動來說，氣體可以直接排出，對環境沒有污染，同時具有較高的安 全性。

8. Because the power source of pneumatic ball valve is gas, which is generally 0.2-0.8mpa, it is relatively safe. If the pneumatic ball valve leaks, compared with hydraulic and electric, the gas can be discharged directly, which has no pollution to the environment and high safety.

9.相對于手動和渦輪轉動球閥來說，氣動球閥可以大口徑配置，（手動和渦輪轉動球閥一般都在DN300口徑以下，氣動球閥目前可以達到DN1200口徑。）

9. Compared with manual and turbine rotary ball valves, pneumatic ball valves can be configured with large diameter. (manual and turbine rotary ball valves are generally below DN300 diameter, and pneumatic ball valves can reach DN1200 diameter at present.)

氣動球閥已廣泛應用于石油、化工、發電、造紙、原子能、航空、火箭等各部門，以及人們日常生活中。

Pneumatic ball valve has been widely used in petroleum, chemical industry, power generation, papermaking, atomic energy, aviation, rocket and other departments, as well as people's daily life.