A watter jacket is a watter-filled casing surroondin a device, teepically a metal sheath haein intake an outlet vents tae allou watter tae be pumped throu an circulated. The flow o watter tae an external heating or cuilin device allows precise temperature control o the device.

Applications eedit

Watter jackets are eften uised in watter cuilin. Thay are an aw uised in laboratory glassware, e.g. Liebig, Graham, an Allihn condensers. Watter jackets war uised tae cuil the barrels o machine guns at the time o the First Warld War, but modren machine guns are air-cuiled tae conserve wecht an hence increase portability.

In a reciprocating piston internal combustion ingine the watter jacket is a series o holes aither cast or bored throu the main cylinder block an connected bi inlet an outlet pipes tae a radiator.