. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . new South Altoona Foundry of thePennsylvania Railroad. Each com-pressor has compound steam cylinders•12 and 21 ins., and two stage air cylin-ders 19 and II ins. diameter, all 24 , designed for 100 lbs. terminalair pressure, with 125 lbs. steam atthrottle, and having a piston displace-ment of 985 cu. ft. of free air per min-ute at 125 r. p. m. In the two stagecompressor the frames have been de-signed in accordance with the most im-proved Corliss construction, the steamand air cylinder
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . new South Altoona Foundry of thePennsylvania Railroad. Each com-pressor has compound steam cylinders•12 and 21 ins., and two stage air cylin-ders 19 and II ins. diameter, all 24 , designed for 100 lbs. terminalair pressure, with 125 lbs. steam atthrottle, and having a piston displace-ment of 985 cu. ft. of free air per min-ute at 125 r. p. m. In the two stagecompressor the frames have been de-signed in accordance with the most im-proved Corliss construction, the steamand air cylinders being tied tandem toeach other with heavy tie-rods and rigidlysupported by a sole plate. Provision is made for a circulationof cold water the entire length of thecylinder, the water passing also throughthe heads, its cooling effect beingespecially concentrated around the dis-charge valves, wliich naturally receivethe heat due to compression and fric-tion that has not been eleminated bythe water jacket during the process ofcompression. A novel feature is theoutside water connection for conduct-. Ail Outlet INTERCOOLER FOR TWO-STAGE COMPRESSORS. air intake valves, poppet and me-chanically actuated. The poppet valvesare placed in the cylinder heads fromthe outside and are immediately ac-cessible for adjustment without remov-ing the cvlinder heads. Thev are made may be independently removed, re-placed and renewed. The valves andseats are held securely in place bylarge screw plugs over which caps arefitted. The proportion of valve areato cylinder area is such that it enablesthe cylinder to fill freely at each stroke. The compressors of larger size arealso built with mechanically moved in-take valves of semi-rotary Corliss type,placed in the cylinder heads and drivenby gear from eccentrics on the mainshaft. These positively moved valvescombine exceptionally liberal area withshort ports and minimum clearance. The motion to drive these Corliss In-take Valves is taken fro
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
