balanced valve

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.

Word History and Origins

Origin of balanced valve¹

First recorded in 1930–35

Example Sentences

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

From Project Gutenberg

The most obvious of these is what is called the balanced valve.

From Project Gutenberg