The valve gear of a steam engine is a mechanism that controls the inlet and exhaust valves. It also serves as a reversing gear. The reversing gear controls the direction of the engine's travel, and adjusts the timing of the slide valves. It also controls when and how long the intake- and exhaust-ports of the cylinders are open. A slide valve engine has a constant direction of pressure. It's only reversed by changing the valve position relative to the crank shaft.
The valve gear of a steam engine is a mechanism that controls the inlet and exhaust valves. It also serves as a reversing gear.
The reversing gear controls the direction of the engine's travel, and adjusts the timing of the slide valves. It also controls when and how long the intake- and exhaust-ports of the cylinders are open. A slide valve engine has a constant direction of pressure. It's only reversed by changing the valve position relative to the crank shaft.
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