The electromagnetic valve:

      When the system needs to realize program control or two-position control, it needs to be equipped with a solenoid valve. When selecting the solenoid valve, in addition to considering the AC and DC power supply, voltage, and frequency, you must pay attention to the relationship between the solenoid valve and the type of the control valve. You can use the "normally open" or "normally closed" type.

      If you need to increase the capacity of the solenoid valve to shorten the operation time, you can use two solenoid valves in parallel or use the solenoid valve as a pilot valve in combination with a large-capacity pneumatic relay.

Pneumatic relay:

     Pneumatic relay is a power amplifier, it can send the air pressure signal to a far place, eliminate the lag caused by the extension of the signal pipeline, mainly used between the field transmitter and the control instrument of the central control room, or in Between the regulator and the on-site regulating valve, there is another function to amplify or reduce the signal.

converter:

      The converter is divided into a gas-electric converter and an electric-gas converter. Its function is to realize the conversion of a certain relationship between gas and electric signals. It is mainly used to control 0 ~ 10mA or 4 ~ when operating pneumatic actuators with electrical signals. Conversion of 20mA electrical signal or 0 ～ 100KPa gas signal into 0 ～ 10mA or 4 ～ 20mA electrical signal.

空氣過濾減壓閥：

     空氣過濾減壓閥是工業(yè)自動化儀表中的一種附件，其主要功能是將來自空壓機(jī)的壓縮空氣進(jìn)行過濾凈化并將壓力穩(wěn)定在所需要的數(shù)值上，可用于各類氣動儀表、電磁閥、氣缸、噴涂設(shè)備及小型氣動工具的供氣源和穩(wěn)壓裝置。

自鎖閥（保位閥）：

     自鎖閥是保持閥位的一種裝置。氣動調(diào)節(jié)閥當(dāng)氣源發(fā)生故障時(shí)該裝置能將氣源訊號切斷，使膜室或氣缸的壓力訊號保持在故障前一瞬間的狀態(tài)，這樣就使閥位也維持在故障前的位置上，起到保位作用。

Valve position transmitter

      When the regulating valve is far away from the control room, in order to be able to accurately understand the switch position of the valve without going to the scene, it is necessary to equip the valve position transmitter, that is, the displacement of the valve opening mechanism is converted into an electrical signal according to a certain rule and sent to the control room The signal can be a continuous signal reflecting any opening of the valve, or it can be regarded as the reverse action of the valve positioner.

Travel switch (echo)

      The travel switch reflects the two extreme positions of the valve switch, and at the same time sends a device indicating the signal, the control room can be based on this signal, betray the switch state of the valve to take corresponding measures.