Poppet valve
"Poppet valve" in a Sentence (2 examples)
This communication between the tank and pump is controlled by a float valve in the tanks and a cock in the pipe, while a poppet valve prevents the undrawn liquor going into the waste tank.
Chesapeake & Ohio's enormous L-2 4-6-4's with Franklin rotary-cam poppet valves boasted an engine weight of 221½ tons and were coal-minded Chessie's last bid to beat the passenger diesel with a reciprocating engine.