Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave.

Check valves are often part of common household items.

Check valves work automatically and most are not controlled by a person or any external control ; accordingly, most do not have any valve handle or stem.

Check valves are often used with some types of pumps.

Check valves are used in many fluid systems such as those in chemical and power plants, and in many other industrial processes.

Check valves are also often used when multiple gases are mixed into one gas stream.

* Check Valves Tutorial The operation, benefits, applications and selection of different designs, including lift, disc, swing and wafer check valves are explained in this tutorial

* Check valves are one-way valves, allowing an accumulator to charge and maintain its pressure after the machine is turned off, for example.

* Pilot controlled Check valves are one-way valve that can be opened ( for both directions ) by a foreign pressure signal.

* Check register, booklet used to record account transactions

The standards allow for a full Cyclic Redundancy Check to be performed across all bits transmitted in each frame, to detect if the circuit is losing bits ( information ), but this is not always used.

In addition, and most importantly, the Aqua-Lung could be mounted on stronger and reliable air tanks holding up to 200 atmospheres ,< ref > Cousteau quickly describes the two Aqua-Lung prototypes used to shoot the film Épaves in 1943 Check here, on minute 3 ' 55 < nowiki ></ nowiki >, when Cousteau mentions his cylinders ' highest pressure ( in French ).</ ref > allowing extension of diving duration to more than an hour at significant depths ( including the needed time for decompression stops ).

The National Instant Criminal Background Check System, used to screen individuals attempting to receive a firearm, is operated from the facility.

Check rails are often used on really sharp curves, even where there are no switches.

* Main steam stop / Check valve: It is used on multiple boiler installations.

* Check ( pattern ), ( or " Chequered ") a pattern of squares used on chess-boards, fabrics, etc.

* Validate: Check whether other transactions have modified data that this transaction has used ( read or written ).

The most commonly used mark is a " Check ", indicating that hashers will have to search in any direction to find the continuation of the trail.

*" Training Check Function ", part of the line testing sequence used for Fax transmissions.

* Check / safety screening: used for quality assurance by checking for foreign contaminants and oversized material and removing them from the product.

Mandated by the Brady Bill, the National Instant Criminal Background Check System ( NICS ) is used by the FBI to screen potential firearms buyers.

British author Helen Fielding used the word in her Bridget Jones series to refer to slovenly or dirty habits, in the original sense still occasionally used in England: " Check plates and cutlery for tell-tale signs of sluttish washing up [...]"

* beaTunes: Writes the standard tags and replaces the metadata tag value, which is used by iTunes software and iPod music players for Sound Check volume normalization.

* iVolume: Replaces the metadata tag value ( optionally on a per-album basis ), which is used by iTunes software and iPod music players for Sound Check volume normalization.

* qNormal: Command line tool written in Java, replaces the metadata tag which is used by iTunes and iPod music players for Sound Check volume normalization.

In 2006, " Check It Out ", a hidden track from the Kokomemedada album, was used in commercials for Old Navy.

Stevens ' Spell Check program was also used in Novell GroupWise.

" However John William Fletcher, Wesley's designated successor, used the term " evangelically sinless perfection " or " evangelically sinless " but notes in his book The Last Check to Antinomianism that " With respect to the FIRST, that is, the Adamic, Christless law of innocence and paradisiacal perfection, we utterly renounce the doctrine of sinless perfection.

Comparables may also be used when performing a " Comp Check ", which is a slang term referring to a simple analysis, usually performed by a real estate agent or broker, to estimate a potential range of selling prices or values.

* Check stocks and flows, maintain structure of systems

* Check SFV-SFV software for UNIX systems

* Monitoring of host resources ( processor load, disk usage, system logs ) on a majority of network operating systems, including Microsoft Windows with the NSClient ++ plugin or Check MK.

* Check the security systems of the help desk.

A CBC Marketplace report filmed in 2007 was critical of the program, showing some Health Check certified products with sodium and sugar levels that were beyond the recommended levels of other food-rating systems.

An IPS can also correct Cyclic Redundancy Check ( CRC ) errors, unfragment packet streams, prevent TCP sequencing issues, and clean up unwanted transport and network layer options.

For example, CFQC-TV in Saskatoon, Saskatchewan preceded each nightly newscast with " Color Check ", which began with the SMPTE color bars as an announcer identified the colors of the vertical bars encouraging viewers to adjust their TV color settings to make sure the colors were " well separated " and matched the description, after which a photograph ( later video footage ) of a woman's face was broadcast for a few moments, allowing viewers to adjust their TV color settings further.

* Check on the vertical.

Check for signs of wear and tear regularly, especially on catches and joints.

Check thickness of clay and build up thin areas by moistening surface with a little water and adding small pieces of clay.

Check with one of them, go ahead -- there's no professional jealousy here ''.

Developing his talents as an MC with Flavor Flav while delivering furniture for his father's business, Chuck D ( Carlton Douglas Ridenhour ) and Spectrum City, as the group was called, released the record " Check Out the Radio ," backed by " Lies ," a social commentary — both of which would influence RUSH Productions ' Run-D. M. C.

The aircraft was refueled, and there was a crew change ; the new flight crew consisted of Captain Ralph G. Kevorkian, Captain / Check Airman Steven E. Snyder and Flight Engineer / Check Airman Richard G. Campbell ( all with more than 30 years employment at TWA ), and Flight Engineer Trainee Oliver Krick, who was starting the sixth leg of his initial operating experience training.

Ali G speaks a comical patois in keeping with his delusions of being black of Jamaican ancestry and peppered with such catchphrases as " Aight " ( alright ), " Booyakasha ", " Big up Yaself ", " Wagwaan ", " West Side ", " Batty Boy " " Respek " ( respect ), " For Real ", " Poonani ", " Check It " and " Keep It Real ".

Check with your local DNR for limits, although common limits for white bass are 25 per day per person.

He also had a small role in Steven Spielberg's 1941 ( 1979 ) in scenes with Toshirō Mifune and Christopher Lee ; during one scene, he names the objects that he has with himself, and sounds like he does in Dr. Strangelove during the " Survival Kit Contents Check " scene.

This may have been electrically the same as or similar to the XT bus ; it most certainly had some similarities since both essentially exposed the 8088 CPU's address and data buses, with some buffering and latching, the addition of interrupts and DMA provided by Intel add-on chips, and a few system fault detection lines ( Power Good, Memory Check, I / O Channel Check ).

The Impressions reached the height of their popularity in the mid-to-late -' 60s with a string of Mayfield compositions that included " Keep on Pushing ," " People Get Ready ", " It's All Right " ( Top 10 ), the uptempo " Talking about My Baby "( Top 20 ), " Woman's Got Soul ", " Choice of Colors ,"( Top 20 ), " Fool For You ," " This is My Country " and " Check Out Your Mind.

Check with your local interlibrary loan staff regarding questions on these charges and whether any costs will be passed on to you.

He also made numerous guest appearances with the Beastie Boys, " Check Your Head " ( 1992 ), " Ill Communication " ( 1994 ), " Hello Nasty " ( 1998 ), and their anthology The Sounds of Science ( 1999 ).

He attempted a situation-comedy comeback in Canada with Check it Out!

* National Agency Check with Local Agency Check and Credit Check ( NACLC ).

* Check Point Abra, a USB drive that combines an encrypted USB flash drive with virtualization, VPN and computer security technologies

In some cases Strayhorn received attribution for his work such as, " Lotus Blossom ", " Chelsea Bridge ", and " Rain Check ", while other such as " Day Dream " and " Something to Live For ", were listed as collaborations with Ellington or in the case of " Satin Doll " and " Sugar Hill Penthouse " were credited to Ellington alone.

The Beastie Boys toured with the Rollins Band and Cypress Hill in early 1992 to support Check Your Head.

Compare it with the Plan Do Check Act ( PDCA ) cycle or Shewhart cycle, which focuses on the operational or tactical level of projects.