Definitions

from The Century Dictionary and Cyclopedia

  • n. A flat plate forming part of the seat of a valve, usually the contact portion, so that it can be renewed on wear or leakage without discarding or re-finishing the entire casting.
  • n. A plate fitting over the end of the casing of a cylindrical valve, serving to guide the valve and close the opening.
  • n. A plate covering an opening into a valve-chest. Usually called a bonnet.

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