Pŭp'pet-vălve, n.

noun

n. (Mech.) A disk like a pot-lid, attached to a stem, and used in steam-engines, &c., to cover and uncover an opening.

The two puppet-valves A are attached and lifted by the common valve-stem B from off the valve-seat C. The pressure, as of entering steam on the top of the upper valve, and on the bottom of the lower valve, is nearly balanced. See BALANCE-VALVE.

A sectional diagram of a puppet valve, showing its central stem and the flow of fluid around the valve. — Puppet-valve.