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2. Piston valve (steam engine) - Wikipedia

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

   This entails controlling the admission and exhaust of steam to and from the cylinders with a valve linked to the motion of the piston. [3] For timing and dimensioning of slide or piston valves where the valve opens and closes the steam and exhaust ports, a consideration of the "lap" and "lead" is required.

3. Steam locomotive components - Wikipedia

   en.wikipedia.org/wiki/Steam_locomotive_components

   Controls the supply of steam to the cylinders. The valve gear, actuated by connection to the driving wheels, ensures that steam is delivered to the piston with precision. Types are slide valves, piston valves or poppet valves. [2] [3]: 62 Valve chest / Steam chest Valve chamber next to the cylinder (24) containing passageways to distribute ...

4. Cutoff (steam engine) - Wikipedia

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

   In a steam engine, cutoff is the point in the piston stroke at which the inlet valve is closed. On a steam locomotive, the cutoff is controlled by the reversing gear.. The point at which the inlet valve closes and stops the entry of steam into the cylinder from the boiler plays a crucial role in the control of a steam engine.

5. Trofimoff valve - Wikipedia

   en.wikipedia.org/wiki/Trofimoff_valve

   The valve spindle is milled out to enable a better through-flow. The 4 piston rings on the valve heads are clearly visible. The valve on this locomotive has a diameter of 300mm. The Trofimoff valve (German: Trofimoff-Schieber) (also Trofimov, Troffimoff or Trofimof) is a springless pressure-compensation piston valve for steam locomotives.

6. Cylinder (locomotive) - Wikipedia

   en.wikipedia.org/wiki/Cylinder_(locomotive)

   The cylinder is made pressure-tight with end covers and a piston; a valve distributes the steam to the ends of the cylinder. Cylinders were initially cast iron , but later made of steel . The cylinder casting includes other features such as (in the case of Stephenson's Rocket ) valve ports and mounting feet. [ 1 ]

7. List of valves - Wikipedia

   en.wikipedia.org/wiki/List_of_valves

   Foot valve: a check valve on the foot of a suction line to prevent backflow; Four-way valve: was used to control the flow of steam to the cylinder of early double-acting steam engines; Freeze seal or Freeze plug: in which freezing and melting the fluid creates and removes a plug of frozen material acting as the valve