A bleed screw is a device used to create a temporary opening in an otherwise closed hydraulic system, which facilitates the removal of air or another substance from the system by way of pressure and density differences. == Applications == === Domestic heating radiators === On a home radiator unit, the bleed screw can be opened, usually by means of a key, to allow unwanted air to escape from the unit.
A bleed screw is a device used to create a temporary opening in an otherwise closed hydraulic system, which facilitates the removal of air or another substance from the system by way of pressure and density differences. == Applications == === Domestic heating radiators === On a home radiator unit, the bleed screw can be opened, usually by means of a key, to allow unwanted air to escape from the unit.
Source: Wikipedia "Bleed screw" · CC BY-SA 4.0
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