Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 900
nts 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. 363 DOUBLE-ACTING TYPE OF DE LA VERGNE AMMONIA COMPRESSOR .^fore^ as in the latter case re-expansion will take place,iresulting in loss of efficiency of the pump. To effect this,-two valves are provided in the lower end of the compressor■cylinder, one above the other. ; Either, or both of…
