steam chest

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steam chest (plural steam chests)

  1. A chamber in a steam engine or locomotive from which steam from the boiler is distributed to the cylinders.
    Synonym: steam dome
    • 1961 March, "Balmore", “Driving and firing modern French steam locomotives”, in Trains Illustrated, page 150:
      One small tooth increase in regulator opening makes a minute increase in steam chest pressure reading and one can feel the clearly perceptible increase in the power output beneath one's feet.