check valve

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check valve

[′chek ‚valv]
(mechanical engineering)
A device for automatically limiting flow in a piping system to a single direction. Also known as nonreturn valve.

Check Valve


a device that passes a stream of fluid or gas through a pipe only in one direction and closes automatically when the direction of the stream reverses. It is used in various thermal power engineering and production plants.

check valve, back-pressure valve, reflux valve

check valve
An automatic valve which permits liquid to flow in only one direction. Also see non-return valve.

check valve

check valveclick for a larger image
Two types of check valves.
A valve that permits the flow of fluid in one direction only. Various types of check valves are depicted in the illustrations.
References in periodicals archive ?
A key attribute of the diaphragm is its ability to provide extremely low cracking pressure compared to other check valve types, like umbrella, duckbill .
If you don't have a shutoff valve above the check valve, install a "full port" shutoff valve ($10) on the waste line above the check valve.
Test the check valve by putting your linger over the end of the valve.
No check valve is required, but a strainer and a separate air vent may be necessary.
The company looked into moving the check valve machining operations onto this machine, utilizing one of the pallets and a Kurt Vise Tower equipped with DoubleLock Kurt vises on each of the towers' four faces.
A second version of the new-style press eliminates the additional accumulator between the gear pump and check valve and instead adds a second injection plunger and shut-off nozzle.
The vacuum line has a shut-off valve, check valve and gauge.
Combination needle and check valve flow controls are typically used to control airflow from air cylinders, thereby controlling the speed at which the piston strokes, either while extending or retracting, depending on their location in the circuit.
Borla started using Cyrolite CG-97 compound for a 3-psi check valve part that was originally being made with polycarbonate and co-polyester Ektar DN.
Perhaps the oldest technique for holding a load in position is the check valve [ILLUSTRATION FOR FIGURE 2 OMITTED].