Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 225
esent a highservice and a low service, the left-handpump working under high pressure, againstthat in the boiler and the right one againstthe head of water in the tank. Eachpump has its own separate connections—one or more—to suit the required con-ditions. The right-hand pump is double acting; the… … Fig. 206. BOILER PUMP. DBLE.-ACTING FORCE PUMP. Diam. cyl. Sue. anddis. Gal. perstroke Diam.cyl. Sue. anddis. lyi in. 2 Gal. perrev. 25^ in. 2^ i^ in. 1—8I 8 3 in- 4 2—54—5 Belted Pumps. 227
Hydraulic machinery · Pumping machinery
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