调节阀是一种管路附件，它是用来改变通路断面和介质流动方向，控制输送介质流动的一种装置。

Control valve is a pipe attachment, which is used to change the channel cross-section and flow direction, the control flow of a medium transport device.

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参阅执行机构和附件章节，了解：伞齿轮，正齿轮，链轮，马达或缸体执行机构；旁路，排泄，或辅助管路；特殊填料，等等。

See Actuators &Accessories section for: Bevel gear, spur gear, chain wheel, motor or cylinder actuators; Bypasses, drains or auxiliary piping; Special packing, etc.

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减小吸入破财HC，为此能够变法儿增多管径，放量减小管路长短，弯头和附件等；

Reduce the inhalation of bankruptcy HC, this can increase children Reform diameter, heavy volume decreases the length of pipe, elbow, and accessories;

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