butterfly valve
21butterfly damper — noun : butterfly valve 2 * * * a damper, as in a flue, that rotates about a central axis across its face. * * * butterfly damper, a thin plate of metal which turns on an axis across a pipe so that it controls the amount of the passage left open… …
22butterfly — See butterfly valve throttle butterfly …
23Asclepias butterfly — Butterfly But ter*fly , n.; pl. {Butterflies}. [Perh. from the color of a yellow species. AS. buter fl[=e]ge, buttor fle[ o]ge; cf. G. butterfliege, D. botervlieg. See {Butter}, and {Fly}.] (Zo[ o]l.) A general name for the numerous species of… …
24valve — n. device that permits flow 1) to grind valves 2) a ball; butterfly; check; exhaust; gate; globe; needle; safety; shunt; suction valve membranous fold that permits body fluids to flow in one direction (anat.) 3) a heart valve (the patient has a… …
25valve — I (New American Roget s College Thesaurus) n. damper, cutoff, cock, butterfly, pallet, poppet; ventil, side valve; plug, piston, cusp. See closure. II (Roget s IV) n. Syn. flap, lid, plug; see device 1 , pipe 1 . Types of valves include:… …
26Flow control valve — Globe control valve with the pneumatic actuator and smart positioner A flow control valve regulates the flow or pressure of a fluid. Control valves normally respond to signals generated by independent devices such as flow meters or temperature… …
27Ball valve — A ball valve (like the butterfly valve and plug valve are one of the family of valves called quarter turn valves ) is a valve that opens by turning a handle attached to a ball inside the valve. The ball has a hole, or port, through the middle so… …
28damper valve — A butterfly valve in an air duct. When the valve is open, the air flows through the duct; when it is closed, the butterfly valve is perpendicular to the airflow and does not permit any air to flow into the system. These valves are normally used… …
29Gate valve — A Gate Valve, or Sluice Valve, as it is sometimes known, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are… …
30Needle valve — Giffard steam water injector (B needle valve). A needle valve …
