Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 904
ents leakage and consequent introduction of air intothe pump, or wasting of the refrigerating gas at eachalternate stroke of the piston without necessitating thepacking of piston so tightly as to cause excessive friction.Fig. 363 shows a sectional view of a double-acting De LaVergne compressor… … Fig. 363double-acting type of de la vergne ammonia compressor fore, as in the latter case re-expansion will take place,resulting in loss of efficiency of the pump. To effect this,two valves are provided in the lower end of the compressorcylinder, one above the other. Either, or both of these valves…
