duplex pump

noun

1. a pair of direct-acting steam pumps so arranged that each pump begins its working stroke just as the other finishes its working stroke, so that the rate of flow of the fluid is nearly continuous.

Example Sentences

One was a Deane compound duplex pump, having a capacity of 500 gal.

From Project Gutenberg

At first a Worthington duplex pump having a capacity of about 500 gal.

From Project Gutenberg