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Expansion link

A curved, slotted lever provided in various designs of valve gear to allow adjustment of the valve events relative to the position of the reverser, hence its name referring to the period of steam expansion. It carries the die block which is used to assist the setting of forward and reverse and the various cut off positions in between and provides a link between the eccentrics and the valve rod.

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  • Part of Speech: noun
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  • Industry/Domain: Transportation
  • Category: Railway
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