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 ?
Check-All Valve[R] provides check valves for practically every service application.
An example of a general Saint-Gobain Seals' anti-blowout seal in a rod sealing application is shown in the illustration at left (note: this illustration is different than the seal used in the actual check valve application, which is custom-designed).
Available in sizes from 3" - 12" / DN80 - DN300 and rated at 16 bar (230psi), the single plate Wafer Check Valve adds to Shipham Valves existing range of composite valves.
The check valves are cast and machined in carbon steel and then shipped to Arc Energy's Gloucestershire factory for weld overlay cladding, with Inconel 625 being applied to all wetted surfaces.
To quiet them, replace the old check valve with a "silent" or "soft close" check valve.
Check valves are used to prevent water pumped to an overhead tank from flowing back when the pump stops.
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.
The BK non-leak check valves are used to allow disconnection of hydraulic connections to pallets, fixtures, and jigs for machining centers and other machinery.
Clear and custom-colored Cyrolite CG-97 is an acrylic-based multi-polymer compound that is now specified for check valves, female luers, lining and pediatric filters, and Y connectors.
Model 170 cartridge check valves offer an increased flow capacity of 8 gpm and incorporates a low-inertia poppet design with double tapered o-ring seats to achieve fast, positive seal.
Thermoplastic manifold type check valve is designed to prevent reverse flow while simplifying installation of multiple check valves.