Valve

A device that controls either pressure of fluid, direction of fluid flow, or rate of flow.

See also Air Intake Shutoff Valve; Butterfly Valve; Bypass Valve (Systems); Check Valve; Compressor Valve; Control Valve; Drain Valve; Explosion Relief Valve; Gate Valve; Globe Valve; Indicator Valve; Pressure Relief Valve; Relief Valve; Safety Relief Valve; Slide Loading Valve; Slide Valve (Bulk Solids); Slide Valve (Screw Compressors); Thermostatic Temperature Control Valve; Trip And Throttle Valve.