An introduction to railway braking
With contactors of this character it is possible to make one circuit and close another without requiring excessive precision. Further ... The valve can be operated either by the air pressure from an air suspension system or mechanically from a measurement of spring deflection. The output ... A8.3 shows a diagram of a Westcode unit including the seven-step relay valve and the variable load limiting valve.
| Title | : | An introduction to railway braking |
| Author | : | Harold Ralph Broadbent |
| Publisher | : | CRC Press - 1969-03 |
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