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 ?
Bottom line: I am not a fan of locking-ring check valves and suggest you stay away from them.
Check-All Valve[R] provides check valves for practically every service application.
In most cases, design engineers integrate check valves into their rocket engine designs.
The check valves feature 2.4 mm and 3.2 mm single barb ends in barb to barb straight through.
"The single plate wafer check valves are an exciting development for us and is a testimony to the skills and expertise of everyone involved with our product development programme," said Dave Bowen, Business Development Manager, Shipham Valves.
The 12" dual plate check valves are being supplied to John Bell Pipeline, main contractor for the In Amenas Trunklines, the largest wet gas project in Algeria, involving the development and production of LNG from four wet gas fields.
Waste lines from a Sewage ejector or sump pump use a check valve to stop wastewater from flowing back into the basin.
Tyco Flow ControlCOs Fasani plant near Milan has inaugurated a new test bench for large gate, globe and check valves that is believed to be the biggest in Europe.
Poppet seals, custom molded from nitrile and many other high performance elastomer compounds, are manufactured by this company for use in check valves for pressure relief and shut-off devices in natural gas valve assembly applications.
* Check valves operate automatically, permitting flow in one direction only.
Place guards over lines so they don't cover cylinder check valves. The notched ends butt against the valves.
The company manufactures a wide range of pinch and check valves for local clients, including Inco and Falconbridge, as well as for area users in the industrial, chemical and municipal sectors, including Kidd Creek Mine and Dome Mine in Timmins and Williams Mine in northwestern Ontario.