Vortex Valves

vortex
Something regarded as a whirling mass
whirlpool: a powerful circular current of water (usually the result of conflicting tides)
A mass of whirling fluid or air, esp. a whirlpool or whirlwind
whirl: the shape of something rotating rapidly
A vortex (plural: vortices) is a spinning, often turbulent, flow of fluid. Any spiral motion with closed streamlines is vortex flow. The motion of the fluid swirling rapidly around a center is called a vortex.

valves
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
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
(valve) device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
(valve) control consisting of a mechanical device for controlling the flow of a fluid
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
(valve) a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it