Figure 6-3.—A maintenance index page for low-pressure air compressor systems (page 2 of 3).MEDIUM-PRESSURE SYSTEMSMedium-pressure systems provide compressed airwithin the range of 151 to 1,000 psig pressure. Thesesystems are not extensive and are generally providedwith individual compressors located near the loads.Medium-pressure systems are mainly used for thestarting of diesel engines, soot blowing of boilers andhigh-temperature water (HTW) generators, andhydraulic lifts.Some Navy vessels do not have a separate aircompressor to supply a direct medium-air pressure.Instead, compressed air from HP air systems is stored inthe user’s air flasks (banks) at high pressure. Then whenneeded, the air is routed through a pressure-reducing6-3
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