Sanitisation process for sanitising a filling device (1) of a receptacle, the filling device (1) comprising a valve body (2), an inlet (4) for a fluid, a dispensing nozzle (5), and a shutter (8) that can be moved inside the valve body (2), comprising the steps of:



bringing the shutter (8) into a position whereby it engages the dispensing nozzle (5) so as to close it completely;
supplying the inlet (4) with the sanitisation fluid so as to fill the valve body (2) with the sanitisation fluid;
moving the shutter (8) away from the dispensing nozzle (5) so as to discharge the condensation that has formed inside the valve body (2).