The pneumatic diaphragm control valve is simply composed of two parts, the pneumatic diaphragm actuator and the valve body. According to the different working conditions, accessories, such as electric valve positioner, converter, solenoid valve, retaining valve and other accessories can also be selected to drive the valve to achieve on-off or proportional regulation, and receive the control signal of the industrial automation control system to complete the regulation of various process parameters of the pipeline medium, such as flow, pressure, temperature, etc.

气动调节阀的特点就是控制简单，反应快速，且本质安全，不需另外再采取防爆措施。气动薄膜调节阀就是以压缩空气为动力源，以气缸为执行器，驱动阀体运动。

The pneumatic control valve is characterized by simple control, fast response and intrinsically safe, so no additional explosion-proof measures are required. The pneumatic diaphragm control valve uses compressed air as the power source and air cylinder as the actuator to drive the valve body.

气动调节阀工作原理

Working principle of pneumatic control valve

气动薄膜衬氟调节阀

Pneumatic membrane lining fluorine regulating valve

气动调节阀就是以压缩空气为动力源，以气缸为执行器，并借助于电气阀门定位器、转换器、电磁阀、保位阀等附件去驱动阀门，实现开关量或比例式调节，接收工业自动化控制系统的控制信号来完成调节管道介质的流量、压力、温度等各种工艺参数。气动调节阀的特点就是控制简单，反应快速，且本质安全，不需另外再采取防爆措施。

The pneumatic control valve uses compressed air as the power source, air cylinder as the actuator, and electrical valve positioner, converter, solenoid valve, retaining valve and other accessories to drive the valve to achieve on-off or proportional regulation, and receives the control signal from the industrial automation control system to adjust the flow, pressure, temperature and other process parameters of the pipeline medium. The pneumatic control valve is characterized by simple control, fast response and intrinsically safe, so no additional explosion-proof measures are required.

气动调节阀动作分气开型和气关型两种。气开型是当膜头上空气压力增加时，阀门向增加开度方向动作，当达到输入气压上，阀门处于全开状态。反过来，当空气压力减小时，阀门向关闭方向动作，在没有输入空气时，阀门全闭。

The action of pneumatic control valve is divided into air open type and air close type. The air opening type is that when the air pressure on the diaphragm head increases, the valve acts in the direction of increasing opening. When the upper limit of input air pressure is reached, the valve is in full open state. Conversely, when the air pressure decreases, the valve acts in the closing direction. When no air is input, the valve is fully closed.

故有时气开型阀门又称故障关闭型。气关型动作方向正好与气开型相反。当空气压力增加时，阀门向关闭方向动作;空气压力减小或没有时，阀门向开启方向或全开为止。故有时又称为故障开启型。气动调节阀的气开或气关，通常是通过执行机构的正反作用和阀态结构的不同组装方式实现。

Therefore, sometimes the air opening valve is also called the fault closing valve. The action direction of air close type is exactly opposite to that of air open type. When the air pressure increases, the valve acts in the closing direction; When the air pressure decreases or does not exist, the valve shall be turned to the opening direction or fully opened. Therefore, it is sometimes called fault open type. The air opening or air closing of the pneumatic control valve is usually realized by the positive and negative action of the actuator and different assembly methods of the valve state structure.

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