空气阀用于在气压回路中控制方向,流量和压力。换向阀按指令信号的要求,更换气流通过的通道,并引导气流按规定的方向流过该通道。在气压系统中,流量控制阀,可以控制一个方向的气流,而让反向气流自由通过。本章只讨论换向阀和流量控制阀,而压力控制阀则与过滤器和润滑器一起包括于26章内。 Air valves are used to control the direction, flow and pressure in the pneumatic circuit. Valve according to the command signal requirements, the replacement of the air flow through the channel, and guide the air flow in the direction of the flow through the channel. In the pneumatic system, the flow control valve, you can control the air flow in one direction, leaving the reverse air flow freely. This chapter only deals with reversing valves and flow control valves, while pressure control valves are included with Chapter 26 in conjunction with filters and lubricators.