API 6A GATE VALVES

Vanessa Butterfly Valves

vanessa butterfly


Vanessa is a genus of brush-footed butterflies. Many people are familiar with it, as it has a near-global distribution and includes conspicuous species such as the red admirals (e.g.

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


(valve) device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone


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) a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it


(valve) control consisting of a mechanical device for controlling the flow of a fluid