Pumps and Hydraulics, Part 2 (of 2)

by N. Hawkins

Fig. 341.—Hand Pump.

Fig. 342.

Fig. 343.

AIR AND VACUUM PUMPS.

An air pump is an apparatus for, 1, the exhaustion; 2, compression or transmission of air.

A vacuum pump is an apparatus consisting of, 1, a chamber or barrel; 2, a suction pipe with a valve to prevent return flow; 3, a discharge pipe which has a valve which is closed when the chamber is emptied and, 4, a steam induction pipe provided with a valve that is opened when the chamber is filled with water and closed when the chamber is filled with steam.