1·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.
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。
2·Pressure regulating AND SHUTOFF valve PRSOV, a valve in the pneumatic system for regulating bleed air pressure from the engine to the pneumatic manifold.
压力调节和关断活门，气源系统中用以调节从发动机到气源总管的引气压力的活门。
3·Air chamber pneumatic pressure pulsation damper air vessel air bottle pressure chamber.
充气增压或不用充气增压的气力式压力脉动阻尼器。通常安装在泵的输出端。