valve face
51Full face diving mask — A full face diving mask is a type of diving mask that seals the whole of the diver s face from the water and contains a mouthpiece or demand valve that provides the diver with breathing gas.cite journal |author=Norfleet WT, Hickey DD, Lundgren CE …
52Poppet valve — A poppet valve is a valve consisting of a hole, usually round or oval, and a tapered plug, usually a disk shape on the end of a shaft also called a valve stem. The shaft guides the plug portion by sliding through a valve guide. In most… …
53blow-back valve — The valve in the flap system that prevents the flaps from being lowered at too high an air speed. If the flaps are down and the air speed increases to too high a value, the flaps will retract automatically. Also called a flap overload valve. Blow …
54flap-overload valve — A valve in the flap system that prevents the flaps from being lowered at speeds that may cause structural damage. If the pilot tries to lower the flaps at higher than permissible speeds, causing excessive air loads on the flap, the valve acts to… …
55Stop valve — Stop Stop, n. 1. The act of stopping, or the state of being stopped; hindrance of progress or of action; cessation; repression; interruption; check; obstruction. [1913 Webster] It is doubtful . . . whether it contributed anything to the stop of… …
56slide valve — noun valve that opens and closes a passageway by sliding over a port • Hypernyms: ↑valve * * * noun : a valve that opens and closes a passageway by sliding over a port; specifically : such a valve often used in steam engines for admitting steam… …
57D valve — Slide Slide, n. [AS. sl[=i]de.] 1. The act of sliding; as, a slide on the ice. [1913 Webster] 2. Smooth, even passage or progress. [1913 Webster] A better slide into their business. Bacon. [1913 Webster] 3. That on which anything moves by sliding …
58Slide valve — Slide Slide, n. [AS. sl[=i]de.] 1. The act of sliding; as, a slide on the ice. [1913 Webster] 2. Smooth, even passage or progress. [1913 Webster] A better slide into their business. Bacon. [1913 Webster] 3. That on which anything moves by sliding …
59butterfly valve — but′terfly valve n. 1) mac a clack valve having two flaps with a common hinge 2) mac a valve, as the throttle valve in a carburetor, that swings about a central axis across its face • Etymology: 1860–65 …
60butterfly valve — 1. a clack valve having two flaps with a common hinge. 2. a valve, as the throttle valve in a carburetor, that swings about a central axis across its face. [1860 65] * * * …
