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F-V-2906: VALVES, AIR VENTING, STEAM
Abstract: This specification covers valves for automatically venting air from mains in steam heating systems.
Valves shall be one of the following types and classes, as specified (see 6.2):
Type I - Without vacuum ...
Valves shall be one of the following types and classes, as specified (see 6.2):
Type I - Without vacuum ...