Double Flap Valves - Hydraulic Valve Schematics

Double Flap Valves

double
Consisting of two equal, identical, or similar parts or things
downward and forward; "he was bent double with pain"
Having twice the usual size, quantity, or strength
Designed to be used by two people
a base hit on which the batter stops safely at second base; "he hit a double to deep centerfield"
having more than one decidedly dissimilar aspects or qualities; "a double (or dual) role for an actor"; "the office of a clergyman is twofold; public preaching and private influence"- R.W.Emerson; "every episode has its double and treble meaning"-Frederick Harrison

valves
(valve) a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
(valve) control consisting of a mechanical device for controlling the flow of a fluid
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
(valve) device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone

flap
any broad thin and limber covering attached at one edge; hangs loose or projects freely; "he wrote on the flap of the envelope"
dither: an excited state of agitation; "he was in a dither"; "there was a terrible flap about the theft"
(of a bird) Move (its wings) up and down when flying or preparing to fly
Move (one's arms or hands) up and down or back and forth
roll: move in a wavy pattern or with a rising and falling motion; "The curtains undulated"; "the waves rolled towards the beach"
(of something attached at one point or loosely fastened) Flutter or wave around

Flap meat and garlic green beans flapping newspapers near Embankment Station London 21st October 2010 12:22.31pm
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