Principles of naval engineering - Historic Naval Ships Association

PRINCIPLES OF NAVAL ENGINEERINGcylinders. Two-stage, V-type low pressure compressorsusually have one cylinder for the first(lower pressure) stage of compression, and onecylinder for the second (higher pressure) stageof compression. W-type compressors have twocylinders for the first stageof compression, andone cylinder for the second stage. This arrangementis shown in the two- stage, three- cylinder,radial arrangement in part A of fig. 17-4,Compressors may be classified according toa number of other design features or operatingcharacteristics.INTERCOOLERINTERCOOLERUNLOADER^UNLOADERGUARDGUARDFEATHERVALVEHIGH PRESSURESUCTION2 NO STAGEPISTONLOW PRESSUREDISCHARGEi1ST. STAGEPISTON»OIL RESERVOIRFigure 17-3,— Reciprocating air compressor (vertical V, two stage, single-acting,low pressure).47.152440