21. The high-pressure cylinders were fitted with diameter Richardson balanced slide valves and had a bore of. 22. It was a slide valve coal gas engine. 23. The class were fitted with a steam chest and slide valves located beneath the piston valves. 24. Conventionally, piston valve locomotives had inside admission, whereas outside admission was used with slide valve locomotives. 25. The compression and expansion processes are provided by a specially designed reciprocating machine using sliding valves . 26. In the 3001 class the steam chest was located underneath the cylinders, and contained two slide valves . 27. On simple slide valves , no opposing steam admission is possible due to the way they are constructed. 28. All cylinders have flat slide valves and outside Heusinger valve gear with lifting links and Kuhn slides. 29. With a comparatively high boiler, later increased to, it was considered impractical to use traditional slide valves . 30. The slide valve is controlled by a fixed crank on the crankshaft . The engine is not reversible.
