double-acting

Updated: May 13, 2025

The engine and pump is a double-acting piston pump direct, without any rotary motion; with a perfect balance valve, it is balanced at all times, and hence the engine remains quiet without blocking, when at work. The engine is mounted on three wheels, which enables it to be turned in a very short space. Many engines have been constructed by the Messrs.

C.E. John Bourne - A Catechism of the Steam Engine