HAR-507 air Regulator designed to receive air at main line pressure and to deliver it at a desired lower regulated pressure.
的HAR - 507空气调节设计为主线，以接受高压空气和提供一个理想的压力，降低监管。
This results in an unbalanced condition which allows the main line pressure to lift the diaphragm off the main orifice and, thereby, open the valve.
在一个不平衡的状况，允许为主线的压力，解除了主要的孔隔膜，从而打开阀门这个结果。
Series a includes steam service for warming up before the main line is opened, and for balancing pressure where the lines are of limited volume.
系列a包括用于在主管道开启前进行加温的蒸汽应用场合，或在流量有限的管道上平衡压力。
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