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 ?
The screw, heater bands, and barrel have the job of melting and injecting hot plastic into the part cavities, but everything depends on the non-return valve or check ring to function properly.
We all recognize that the non-return valve is a problem.
Specialist valve manufacturer Dairy Pipe Lines have developed a new range of non-return valves to meet the stringent requirements of hygienic processing.
Tenders are invited for Flash Back Arrestor For Acetylene/Propane Regulator End Having Non-Return Valve, Flame Arrestor, Thermal Cut Off Valve, Specification Confirming To En730/Iso 5175-1/Is-11006-2011, Working Pressure1.
Unveiling QSO Quick Shut-off non-return valve that delivers both high flow and rapid material shutoff for part weight consistency.
Limited Tenders are invited for Cast Iron Sluice Valve & Double Flanged Non-Return Valve -2 Items -Reg.
Youngstown, Ohio, to make and sell the Glycon QSO (quick-shutoff) non-return valve.
It also features adaptive software that minimizes variation in the locking behavior of the non-return valve.
Tenders are invited for Requirement of bushing clamps for 33KV 450KVAr series reactor (BHEL Make) and non-return valve for air compressors at 220KV S/Stn Indraprastha.
Check the non-return valve, nozzle end cap, and nozzle tip for abrupt changes in flow path--more dead spots where polymer can hang up and degrade.
The problem may be due to a problem with shot-size control, barrel wear, or a leaking non-return valve.