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2. Piston valve (steam engine) - Wikipedia

   en.wikipedia.org/wiki/Piston_valve_(steam_engine)

   Piston valves are one form of valve used to control the flow of steam within a steam engine or locomotive. They control the admission of steam into the cylinders and its subsequent exhausting, enabling a locomotive to move under its own power.

3. Valve gear - Wikipedia

   en.wikipedia.org/wiki/Valve_gear

   In the simple case, this can be a relatively simple task as in the internal combustion engine in which the valves always open and close at the same points. This is not the ideal arrangement for a steam engine, though, because greatest power is achieved by keeping the inlet valve open throughout the power stroke (thus having full boiler pressure, minus transmission losses, against the piston ...

4. Corliss steam engine - Wikipedia

   en.wikipedia.org/wiki/Corliss_steam_engine

   A Corliss steam engine – the valve gear is on the right of the cylinder block, on the left of the picture. A Corliss steam engine (or Corliss engine) is a steam engine, fitted with rotary valves and with variable valve timing patented in 1849, invented by and named after the US engineer George Henry Corliss of Providence, Rhode Island.

5. Steam locomotive components - Wikipedia

   en.wikipedia.org/wiki/Steam_locomotive_components

   Collects steam at the top of the boiler (well above the water level) so that it can be fed to the engine via the main steam pipe, or dry pipe, and the regulator/throttle valve. [2] [5] [6]: 211–212 [3]: 26 Air pump / Air compressor Westinghouse pump (US+) Powered by steam, it compresses air for operating the train air brake system.

6. Walschaerts valve gear - Wikipedia

   en.wikipedia.org/wiki/Walschaerts_valve_gear

   A set of Walschaerts valve gear on 60163 Tornado. Note that the radius bar is set to reverse. The Walschaerts valve gear is a type of valve gear used to regulate the flow of steam to the pistons in steam locomotives, invented by Belgian railway engineer Egide Walschaerts in 1844.

7. Slide valve - Wikipedia

   en.wikipedia.org/wiki/Slide_valve

   In the 19th century, most steam locomotives used slide valves to control the flow of steam into and out of the cylinders. In the 20th century, slide valves were gradually superseded by piston valves, particularly in engines using superheated steam. There were two reasons for this: With piston valves, the steam passages can be made shorter.