译文：
气动球阀的工作原理是靠旋转阀恋来使阀门畅通或闭塞。气动球阀开关轻便，体积小，可以做成很大口径，密封可靠，结构 简单，维修方便，密封面与球面常在闭合状态，不易被介质冲蚀，在各行业得到广泛的应用。 气动球阀和旋塞阀是同属一个类型的阀门，只有它的关闭件是个球体，球体绕阀体中心线作旋转来达到开启、关闭的一种阀门。 气动球阀在管路中主要用来做切断速度快、分配和改变介质的流动方向。气动球阀是近年来被广泛采用的一种新型阀门，它具有以下优点： 1． 流体阻力小，其阻力系数与同长度的管段相等。 2． 结构简单、体积小、重量轻。 3． 紧密可靠，目前球阀的密封面材料广泛使用塑料、密封性好，在真空系统中也已广泛使用。 4． 操作方便，开闭迅速，从全开到全关只要旋转90°，便于远距离的控制。 5． 维修方便，气动球阀结构简单，密封圈一般都是活动的，拆卸更换都比较方便。 6． 在全开或全闭时，球体和阀座的密封面与介质隔离，介质通过时，不会引起阀门密封面的侵蚀。 7． 适用范围广，通径从小到几毫米，大到几米，从高真空至高压力都可应用。 气动球阀已广泛应用于石油、化工、发电、造纸、原子能、航空、火箭等各部门，以及人们日常生活中。

“ Pneumatic valve function”是由提供的国际阀门新闻，译文仅供参考。另外，中国气动阀门网还提供相关产品搜索：、、、、等。

原文：
Pneumatic ball valve works by relying on rotary valve love to make the valve flow or occlusion. Pneumatic ball valve switch lightweight, small size, can be made into a great caliber, sealed and reliable, simple structure, easy maintenance, sealing surface and spherical often in closed state, can not easily be medium erosion, in all sectors to be widely used. Pneumatic valve and plug valves belong to the same type of valve, only the closure of its parts is a sphere, the sphere around the center line as a rotary valve to achieve the open, close a valve. Pneumatic ball valve in the pipeline is mainly used to make cutting speed, distribution and change the direction of media flow. Pneumatic ball valve is widely used in recent years, a new type of valve, it has the following advantages: 1. Fluid resistance is small, the drag coefficient with the same length of pipe equal. 2. Simple structure, small size and light weight. 3. Close and reliable valve sealing surface material is currently widely used in plastic, sealing well, in the vacuum system has also been widely used. 4. Easy to operate, opening and closing rapidly, from fully open to fully closed as long as the rotation 90 °, to facilitate remote control. 5. Easy maintenance, pneumatic valve structure is simple, seals are generally activities, and demolition are relatively easy to replace. 6. In the fully open or fully closed, the ball and valve seat sealing surface and the dielectric isolation, medium passed, will not cause the erosion of the valve sealing surface. 7. Wide application and a few millimeters diameter from small to large as a few meters from the high vacuum to high pressure can be applied. Pneumatic ball valve has been widely used in petroleum, chemical, power generation, paper, atomic energy, iation, rockets and other departments, as well as people's daily life.