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(dòng)調(diào)節(jié)閥的特點(diǎn)就是控制簡(jiǎn)單，反應(yīng)快速，且本質(zhì)安全，不需另外再采取防爆措施。氣動(dòng)薄膜調(diào)節(jié)閥就是以壓縮空氣為動(dòng)力源，以氣缸為執(zhí)行器，驅(qū)動(dòng)閥體運(yùn)動(dòng)。

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(dòng)調(diào)節(jié)閥工作原理

Working principle of pneumatic control valve

氣動(dòng)薄膜襯氟調(diào)節(jié)閥

Pneumatic membrane lining fluorine regulating valve

氣動(dòng)調(diào)節(jié)閥就是以壓縮空氣為動(dòng)力源，以氣缸為執(zhí)行器，并借助于電氣閥門定位器、轉(zhuǎn)換器、電磁閥、保位閥等附件去驅(qū)動(dòng)閥門，實(shí)現(xiàn)開關(guān)量或比例式調(diào)節(jié)，接收工業(yè)自動(dòng)化控制系統(tǒng)的控制信號(hào)來完成調(diào)節(jié)管道介質(zhì)的流量、壓力、溫度等各種工藝參數(shù)。氣動(dòng)調(diào)節(jié)閥的特點(diǎn)就是控制簡(jiǎn)單，反應(yīng)快速，且本質(zhì)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(dòng)調(diào)節(jié)閥動(dòng)作分氣開型和氣關(guān)型兩種。氣開型是當(dāng)膜頭上空氣壓力增加時(shí)，閥門向增加開度方向動(dòng)作，當(dāng)達(dá)到輸入氣壓上，閥門處于全開狀態(tài)。反過來，當(dāng)空氣壓力減小時(shí)，閥門向關(guān)閉方向動(dòng)作，在沒有輸入空氣時(shí)，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(shí)氣開型閥門又稱故障關(guān)閉型。氣關(guān)型動(dòng)作方向正好與氣開型相反。當(dāng)空氣壓力增加時(shí)，閥門向關(guān)閉方向動(dòng)作;空氣壓力減小或沒有時(shí)，閥門向開啟方向或全開為止。故有時(shí)又稱為故障開啟型。氣動(dòng)調(diào)節(jié)閥的氣開或氣關(guān)，通常是通過執(zhí)行機(jī)構(gòu)的正反作用和閥態(tài)結(jié)構(gòu)的不同組裝方式實(shí)現(xiàn)。

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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