在气动控制系统中,为了控制、调节气流压力的高低、流量的多少和流动方向,必须有控制元件(通常称为阀类),以保证气动执行机构(如气缸、气马达等)按规定的要求进行工作。控制阀按其作用可分为:压力控制阀、流量控制阀和方向控制阀。下面分别进行介绍:一、压力控制阀气动与液压的能源系统不同,液压是每台装置上一般都自带液压源(油 In the pneumatic control system, in order to control and regulate the level of air pressure, the amount of flow and the direction of flow, there must be control elements (usually called valves) to ensure the pneumatic actuator (such as air cylinder, air motor, etc.) Ask for work Control valve according to its role can be divided into: pressure control valve, flow control valve and directional control valve. The following were introduced: First, the pressure control valve pneumatic and hydraulic energy system is different, each hydraulic device is usually equipped with a hydraulic source (oil