Calor Gas cylinders are specially designed to store the fuel in its liquid state. The liquid turns to gas very easily, and gas fills the space above the liquid in the cylinder.
As gas is drawn off, more liquid turns to gas to replace it. A regulator fitted in the supply line between the cylinder and the appliance keeps the pressure of the gas constant as the cylinder empties - until there is no liquid left to turn to gas.

Types of cylinders
There are two main types of gas cylinder available, Butane and Propane.
(There are also liquid Off-take cylinders for forklift trucks and special types for other automotive uses.)
Essentially, Calor butane comes in our yellow 11.34kg and 5kg cylinders.  They are normally used indoors, mainly with cookers, hobs and mobile space heaters. They can also be used outdoors for BBQs. While butane can be stored outdoors, you need to be aware that it will not vaporise (i.e. the liquid turns to gas) at temperatures below 2 degrees Celsius and therefore will not operate satisfactorily in cold weather conditions.
As regulators normally used with butane are not designed for outdoor use they must be protected against the weather and water. So for these reasons, where a permanent outdoor supply is required, it is normally recommened to use propane.
Calor propane comes in a range of storage options e.g. Calor propane is the gas which is stored in a Calor bulk tank, in large red Calor 34kg cylinders and in large green Calor 47kg cylinders and also in our grey Calor 11.34kg Patio gas cylinders. 
Calor propane is stored outdoors, it vapourises at any temperature above -42 degrees celsius.

For more information on Calor gas applications please contact Gouldings Hardware on 045.876.579