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Cornelius keg

A cornelius keg (also known as a Corney or soda keg) is a metal container (keg) originally used by the soft drink industry, and can be used to store and dispense homemade sodas and home brewed beer. Cornelius kegs were originally made by Cornelius, Inc.

In the keg, fully made soda is stored under pressure just like standard cans and bottles. The soda is referred to as "pre-mix" in the industry, as compared to Bag-In-Box (BIB) packages which are concentrated syrup. BIB soda is cheaper but requires a high quality water source and well calibrated dispenser. Pre-mix soda costs more and takes up more space but can be used anywhere, and the equipment is simpler and cheaper.


Pin-lock and ball-lock

Cornelius kegs come in many sizes:

Size (US gal) Size (litres) Diameter (Inch) Height (Inch)
2.378 9 8,25" 15"
3 11.355 8,5" 17"
5 18.925 8.5" 24.75"
10 37.85 12.25" 24.75"

A cornelius keg is a stainless steel cylinder which can hold a maximum of 130 PSI. There are three openings in the keg: a large central hole which, by its design, can only be opened when the keg is not pressurized, and two ports with valves which are only opened when a hose with an appropriate fitting is attached to them. The central opening is used for filling and cleaning the keg, while the two ports are used to dispense the drink. On the lid for the central opening, there is a metal handle that when depressed, closes and seals the keg. Also on the top is a pressure relief valve that is usually identified by a circular ring (like a key ring). This can be pulled to release the pressure in the keg. Two metal tubes are attached to the ports on the inside of the keg. The "gas-in" port has a short tube, not reaching the fluid. The "liquid-out" port has a long tube (a "dip tube") which reaches to the bottom of the keg. When pressurized gas (usually carbon dioxide and sometimes nitrogen) is forced into the "gas-in" port, it pushes the drink from the bottom of the keg, out of the "liquid-out" port, presumably to a tap.

The connectors which attach to the ports come in two varieties: pin-lock and ball-lock, and they are not interchangeable. Historically, pin-lock kegs were used primarily by the Coca-Cola company, while ball-lock kegs were used primarily by Pepsi. On a pin-lock keg, there are metal posts (pins) extending horizontally from around the port. When the connector is attached, these pins hold it in place. The "gas-in" port has two pins, while the "liquid-out" has three, making it impossible to accidentally attach the hoses backwards (which would result in carbon dioxide bubbling up through the drink, but no drink being dispensed). Ball-lock kegs have ridges in the ports, which are gripped by small metal balls in the connectors. Both types of kegs are fairly easy to find, though ball-lock seem to be more common.

Cornelius kegs are most commonly used by home brewers as an alternative to bottling their beer, as the kegs are easier to fill, clean and maintain than industry-standard beer kegs. In addition to this, most home brewers must bottle their beer by hand, which can be a tedious chore for large batches of beer. The most common size of Cornelius keg holds five US gallons, which is the size of a typical batch of home brewed beer. This means that rather than saving, cleaning, and filling approximately fifty bottles, the brewer only needs to fill one keg. Despite the simplified bottling procedure, kegged beer generally requires a kegerator, which can be difficult to set up and maintain, for dispensing. Furthermore, individual bottles have superior portability when compared to a cornelius keg.

Ball lock type quick disconnects seem to be the most popular way to connect both gas and liquid lines to the Cornelius keg for home brew dispensing. A typical beer line to control foaming has a 3/16th internal diameter giving it a resistance of 2 psi per foot. It is common to serve at pressures between 9 and 11 PSI.

External links[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Cornelius_keg — Please support Wikipedia.
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18 news items


Tue, 09 Dec 2014 19:50:19 -0800

Brew masters then fill a five gallon cornelius keg with water and attach the hoses from the keg posts to the Zymatic. Depending on the recipe, users add grain to the main compartment of the step filter and add hops into the appropriate hop cages inside ...
Healthy Eats (blog)
Tue, 30 Sep 2014 13:03:45 -0700

When carbonating with a SodaStream or a cornelius keg (for large-batch carbonation), the water should be 55 degrees F or colder. Hunsinger prefers his soda with a champagne-level of carbonation, but you can be as aggressive or as relaxed as you prefer.

The Guardian

The Guardian
Fri, 19 Sep 2014 03:00:51 -0700

Sara Barton, of Brewsters Brewery, taking a look at the latest in homebrew trechnology. Photograph: Fabio De Paola /Observer. Kit Buchan. Friday 19 September 2014 06.00 EDT. Share on Facebook · Share on Twitter · Share via Email · Share on LinkedIn ...


Fri, 23 May 2014 15:39:16 -0700

The device is simply a brewing box connected by hose to a Cornelius keg. To make beer, you pour in your desired amount of malted barley, hops and water, then push a couple buttons to set a recipe. Three-and-a-half hours later, that water turns into beer.
Motley Fool
Mon, 02 Jun 2014 07:23:33 -0700

You fill a 5-gallon Cornelius keg with water. You attach the water supply hose. And you upload the recipe from your computer or smartphone. Then, you walk away and let the Zymatic go to work. All that's needed after that is a chiller or some ice to ...

Digital Trends

Digital Trends
Sun, 23 Mar 2014 02:56:15 -0700

After you load the right ingredients into designated compartments, you take a Cornelius keg filled with water, attach it to the machine, and watch the Zymatic flood the chamber with hot water – that's the mash, in brewing terms. No need to stay and ...
Eater LA
Wed, 23 Apr 2014 16:36:55 -0700

We spent a month creating a ginger beer base, which is then loaded up into a Cornelius keg and attached to CO2. We were just so unhappy with commercial ginger beer. This way, the whole drink is carbonated. Where do you think cocktails are destined to ...


The Seattle Times
Mon, 30 Sep 2013 00:03:16 -0700

Then you measure and pour grain into a plastic tray and the hops into specially designed filter baskets. You then slide them into the machine. A small “Cornelius” keg is filled with water and attached to the machine, which circulates the water back and ...

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