气动—使用辅助压缩空气或水的来源转变阀，而不是一个螺线管操作。
Air Operated - Uses auxiliary compressed air or water source to shift valve, rather than a solenoid operator.
气动—使用辅助压缩空气或水压力转换阀，而不是一个螺线管操作。会议提供了一个选择3个气动操作压力等级。
Air Operated - Uses auxiliary compressed air or water pressure to shift valve, rather than a solenoid operator. ASCO offers a choice of 3 pneumatic operator pressure ratings.
部分装置在两端装有阀操作器，气动操作。
Some units are equipped with valve operators on both ends and with pneumatic resets.
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