The purge and balancing valves shall be a Watts Regulator Company model PB-56.
这种排气平衡阀应该是美国瓦茨调节阀公司型号PB - 56产品。
Mark 25 valves have a plug-in base or manifold, a plug-in solenoid and an optional plug-in sandwich pressure regulator.
马克25阀有一个基础或多方面的，一个插件螺线管插件和三明治压力调节可选插件。
This output can be modified by operating the special regulator incorporated in the valve (see the last pages for a description of how to regulate the valves).
气体输出量可以通过调节电磁阀上特殊调节器操作。
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