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.

氣動調節閥的特點就是控制簡單，反應快速，且本質安全，不需另外再采取防爆措施。氣動薄膜調節閥就是以壓縮空氣為動力源，以氣缸為執行器，驅動閥體運動。

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.

氣動調節閥工作原理

Working principle of pneumatic control valve

氣動薄膜襯氟調節閥

Pneumatic membrane lining fluorine regulating valve

氣動調節閥就是以壓縮空氣為動力源，以氣缸為執行器，并借助于電氣閥門定位器、轉換器、電磁閥、保位閥等附件去驅動閥門，實現開關量或比例式調節，接收工業自動化控制系統的控制信號來完成調節管道介質的流量、壓力、溫度等各種工藝參數。氣動調節閥的特點就是控制簡單，反應快速，且本質安全，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.

氣動調節閥動作分氣開型和氣關型兩種。氣開型是當膜頭上空氣壓力增加時，閥門向增加開度方向動作，當達到輸入氣壓上，閥門處于全開狀態。反過來，當空氣壓力減小時，閥門向關閉方向動作，在沒有輸入空氣時，閥門全閉。

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.

故有時氣開型閥門又稱故障關閉型。氣關型動作方向正好與氣開型相反。當空氣壓力增加時，閥門向關閉方向動作;空氣壓力減小或沒有時，閥門向開啟方向或全開為止。故有時又稱為故障開啟型。氣動調節閥的氣開或氣關，通常是通過執行機構的正反作用和閥態結構的不同組裝方式實現。

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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