| 41. | Its balanced slide valves were arranged above the cylinders and were actuated by Stephenson link motion through rocker shafts.
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| 42. | They had slide valves, which was unusual on a superheated locomotive, instead of piston valves like the Class Hd.
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| 43. | There were Corliss valves on the HP cylinder and slide valves on the LP, in fact a classic Lancashire configuration.
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| 44. | A series of differently sized rubber plugs pumped down inside the casing open and then later close the sliding valves.
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| 45. | The 11Bs therefore emerged as a robust and substantially enlarged evolution of GCR Class 11, with the then-conventional slide valves.
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| 46. | Early designs used the D slide valve but this has been largely superseded by Piston valve or Poppet valve designs.
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| 47. | The flow of spent catalyst to the regenerator is regulated by a " slide valve " in the spent catalyst line.
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| 48. | Specifically, the tests are designed to determine whether one of the two slide valves that help move the rudder is jammed.
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| 49. | Preston Services have stated that there were both slide valve and piston valve versions, only 247 were made between 1934 and 1962.
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| 50. | While the slide valve variant was only available as a kit, the piston valve version was available as a complete engine or kit.
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