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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.

空气过滤减压阀：

     空气过滤减压阀是工业自动化仪表中的一种附件，其主要功能是将来自空压机的压缩空气进行过滤净化并将压力稳定在所需要的数值上，可用于各类气动仪表、电磁阀、气缸、喷涂设备及小型气动工具的供气源和稳压装置。

自锁阀（保位阀）：

     自锁阀是保持阀位的一种装置。气动调节阀当气源发生故障时该装置能将气源讯号切断，使膜室或气缸的压力讯号保持在故障前一瞬间的状态，这样就使阀位也维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.