check valve

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check valve

A valve that permits fluids or gases to flow in just one direction. Check valves are used in infusion sets to prohibit backflow of fluids during intravenous therapy.
See also: valve
References in periodicals archive ?
Screw Conventional Conventional Mixing Nonreturn Valve Conventional Sleeve Mixer Conventional Cushion (avg.
It has a new V-8000C controller and new ion-nitrided screw and barrel, as well as a multi-notch nonreturn valve that reportedly improves reaction times.
Spirex will introduce the PowerPurge system, which cleans screws, barrels, and nonreturn valves without disassembling the injection unit.
Also showing Mallard four-piece nonreturn valves, and Wexco bimetallic barrels.
According to consultant Jack Stroup of Cuyahoga Falls, Ohio (formerly an executive at Van Dorn Plastic Machinery), who has been working with Dray to develop the new valve, typical nonreturn valves require excess pullback beyond that which is needed to prevent drool into an open mold.