slide valve

American  

noun

Machinery.

1. a valve that slides without lifting to open or close an aperture, as the valves of the ports in the cylinders of certain steam engines.

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slide valve British  

noun

1. a valve that slides across an aperture to expose the port or opening

2. (modifier) fitted with slide valves

   a slide-valve engine

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Etymology

Origin of slide valve

First recorded in 1795–1805

Example Sentences

The slide valve may also be operated by hand before the engine is started, or it may be operated by a steam reversing gear.

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

The throttle valve is a simple slide valve and must have been primitive for the time, for the balance-poppet throttle valve was in use in this country previous to 1851.

From The 'Pioneer': Light Passenger Locomotive of 1851 United States Bulletin 240, Contributions from the Museum of History and Technology, paper 42, 1964 by White, John H.

This mechanism, as a whole, may also be called, and is sometimes called, the valve gear, because it is the mechanism or gear that operates the slide valve.

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

Brake pipe air will now be free to flow past the piston to the slide valve chamber and out at "R" to the auxiliary reservoir.

From The Traveling Engineers' Association To Improve The Locomotive Engine Service of American Railroads by Anonymous

At the same time port "s" in the slide valve registers with port "r" in the slide valve seat, and allows air from the auxiliary reservoir to flow to the brake cylinder.

From The Traveling Engineers' Association To Improve The Locomotive Engine Service of American Railroads by Anonymous