The design of marine engines and auxiliaries (1916)
Bragg, Edward Milton, b. 1874 · New York, D. Van Nostrand Co. · leaf 179
171. Types of Air Pumps. —• Air pumps can be dividedroughly into four classes: 1. Reciprocating pumps with three sets of valves. 2. Reciprocating pumps with one set of valves. 3. Compound pumps. 4. Rotary pumps. Fig. 89 is an example of a pump of class (i), with a set of headvalves, bucket valves,… … Fig. 89. CONDENSERS AND AIR PUMPS l6l the pump works in two stages. On the under side of the bucketthe pressure varies from the vacuum to a pressure about half-way between that and the discharge pressure. On the upperside of the bucket the pressure varies from something less thanthe upper pressure…
Marine engines
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