For valve with Arrow Position Indicator, add the letter "I" before the dash separator (e. g., 4423i-025).

对于带箭头位置指示器的阀门，在破折号之前加上字母“I”，例如：4423i - 025。

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The mechanical throttle valve is electrically controlled, e. g. the valve position is under closed-loop control to the output of the pressure gauge.

所述机械节流阀受到电控制，例如阀门位置受到根据所述压力表的输出进行的闭环控制。

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E/P Positioner, P/P Positioner, Air-set, Booster relay, Air-valve, Limit switch, Solenoid valve, Lock-valve, Speed controller, Position transmitter, etc.

定位器、P/P定位器、空气过滤减压阀、气动加速器、气控阀、限位开关、电磁阀、闭锁阀、速度控制器、阀位传送器等。

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