Document REVXN8qYJR72mwq3M2k1MYkV

RECIPROCATING TYPES continued Stationary Standard stationary compressors, intended tor installation on more or less permanent foundations, are built in a num ber of types: (a) Vertical or V single-acting units, either air* or water-cooled, and single- or 2-itage, are available in sixes up to ISO hp. (b) Double-acting units, of vertical V, Y, temi-radlol or right-angle types, and single-stage or multistage, come in 60-hp and larger sixes. They are watercooled. (c) Double-acting units of tingle-frame type, horixontal or vertical, single-stage or multistage, range in site up to 115 hp, are water-cooled, (d) Duplex horiionUl double-acting compressors, water-cooled ond single-stage or multistage, run 7$ hp and larger. Photos on these two pages show a few of typical designs ovailoble today. Singla-Adlng. Pig. 1 and 2 show two examples of this design. Vertical unit, 1, mounts on its receiver, it air-coolcdSingle-stage, Its maximum pressure rating is ISO psi in the Y- to lS-hp range. Two-stage air-cooled tank-mounted units are available for pressures to 200 psi. Water-cooled unit, 2, has motor, compressor ond radiator on a single base for direct mounting on plant floor. Pressure rating is 100 pii, capacity to 420 cfm at 100 psi. Double-Acting. Right-angle crossheod-typc 2-stage watercooled unit, in Pig. 3, is rated at 80 to 125 psi with a dis placement of 2397 cfm ot 3S0 hp.Wertlcol V unit, Pig. 4, has a normal pressure rating to 12$ psi and a displacement of 368 to 1828 cfm, depending on number of cylinders. Single-frame units like that in Fig. S are built in a wide range of capacities for normal 100-pat plant service. Drive is usually an eteetric motor. Duplex compressor. Pig. 6. offers capacities from 350 to 10.000 cfm, at pressures from 80 to 125 psi. Other Types- In addition to types mentioned there are a number of other designs widely used for various jobs. Multistage, multicylinder, opposed units, Pig. 7, are built for pressures to 6000 psi, ratings to 5000 hp. OiUess compressors, Fig. 8, ore used where air free from oil Is needed. Design shown has a carbon cylinder liner backed with steel. Piston rings are metallic. Compressor cylinder needs no lubricant. Other designs have o tail-rod and bearing to make piston free-floating; piston rings are made of carbon. Another construction has carbon pistons. Bngine-drlven compressors. Fig. 9, have a vertical or V engine (gas or diesel) driving horiiontal compressor pis tons, In double-acting cylinders. Another type of compressor populor in some plants it similar in design to locomotive air-brake units. Steamdriven, It mounts on wall, takes but little space. llngle-stage Ingle-acting olr-coelsd ismprtuir, wig, , ISO-pil prniurt rating, % to IS-hp rang*, It on race!** i Vertical V unit has two or four cylinder*, depending en TM capacity desired. Pressures range to 123 psi, cfm to Hit "Packaga-typ*" compressor hat components an a (Ingle bale I hr ea*Y mounting directly en plant fleer, li water-cooled Another pockoge-type compressor hoi ttc cylinder! at right angles, laket little ipete. Water-cooled, 2-stage, 310-hp HsHiental tingle-frame enlts Ilka this are built In wide JL Oaplen double-acting compressor Is typical of designs In of capacities. Normal pressure rating It 100 ptl this type for 10 te 133 psi. Made In wide capoclty range f--7 ' rree-Plston Compressors- * These; compact, relatively vibration*. ` .free units now And commercial use in ; Europe*. Diagram shows one'arrange ment; with opposed-piston diescl;cy1inder in-center, air cylinder at ends. For details, see Powsa, Feb 1951, pp 84-86- is;. Zli::i5l53 Multistage, multkyllndor, opposed unit Is built Ter surer te 6000 psi. Other types alio handle high pr* compressor uses no lubricant In cylinder, discharges ^free air. Cylinder liner Is carbon, backed with eteel This V-typa gas engine drives horlsontol air compressors two anils ore combined In a tingle frame far compactness HANDBOOK ON COMPIC93ED All PO**1 HANDBOOK ON COMPIESSCD AIK I & m i