| 21. | It was a slide valve coal gas engine.
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| 22. | The class were fitted with a steam chest and slide valves located beneath the piston valves.
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| 23. | The high-pressure cylinders were fitted with diameter Richardson balanced slide valves and had a bore of.
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| 24. | Conventionally, piston valve locomotives had inside admission, whereas outside admission was used with slide valve locomotives.
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| 25. | The compression and expansion processes are provided by a specially designed reciprocating machine using sliding valves.
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| 26. | In the 3001 class the steam chest was located underneath the cylinders, and contained two slide valves.
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| 27. | All cylinders have flat slide valves and outside Heusinger valve gear with lifting links and Kuhn slides.
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| 28. | On simple slide valves, no opposing steam admission is possible due to the way they are constructed.
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| 29. | With a comparatively high boiler, later increased to, it was considered impractical to use traditional slide valves.
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| 30. | Superheating also required alteration of the valve gear and piston valves were therefore used instead of slide valves.
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