rotary valve

American  

noun

Machinery.

1. a valve that rotates continuously or through an arc to open and close.

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Example Sentences

The whole apparatus is actuated by compressed air from a tank, controlled by a rotary valve which creates the pulsating pressure.

From Time Magazine Archive

A. Yes; as the air that operates this head comes through the automatic brake valve, and when the handle is moved beyond holding position, the port in the rotary valve seat, through which the air flows to chamber "d" is closed, thereby cutting out this head, leaving the compressor under the control of the maximum pressure head.

From Project Gutenberg

This allows air from the control cylinder "D" and control reservoir to flow through the release pipe "IV" and on to the automatic brake valve, where the port to which this pipe leads is blanked by the automatic rotary valve, which prevents the air leaving the control cylinder and reservoir, thus holding the locomotive brake applied while the train brakes are being released.

From Project Gutenberg

A. This may be caused by leakage past the rotary valve, defective body gasket, or leakage by the feed valve or its case gasket.

From Project Gutenberg

In emergency position of the automatic brake valve there is a small port in the rotary valve, called the blow-down timing port, through which main reservoir air is free to flow to the application cylinder "g" through the application cylinder pipe "II", causing a rise of pressure equal to the adjustment of the safety valve.

From Project Gutenberg