balanced valve

American  

noun

1. a valve designed so that pressure-induced forces from the fluid being controlled oppose one another so that resistance to opening and closing the valve is negligible.

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Etymology

Origin of balanced valve

First recorded in 1930–35

Example Sentences

A balanced valve is one in which means are employed to relieve the back of the valve of the steam pressure, and thus prevent its being forced to its seat with unnecessary pressure.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

This operates the spindle S, which, in turn, partially closes the balanced valve in body B, thus cutting down the steam supply delivered to the engine.

From Steam Engines Machinery's Reference Series, Number 70 by Anonymous

This engine has a balanced valve and automatic cut-off, and is fitted with a reversing-gear for use on the road.

From A History of the Growth of the Steam-Engine by Thurston, Robert H.