Method and device for filling a container with a predetermined quantity of fluid, filling machine

摘要

A device includes a nozzle ( 14 ) for delivering a fluid flow into a container ( 12 ), a valve ( 16 ) having a movable valve member ( 27 ) for controlling the fluid flow, a member ( 54 ) for sending a position control signal to the movable valve member ( 27 ), such that the movable valve member ( 28 ) is expected to follow an expected displacement vs. time curve which adjusts the quantity of fluid delivered into the container ( 12 ) to the predetermined quantity. The device further includes a sensing element ( 56 ) for sensing a point of the actual displacement vs. time curve followed by the movable valve member ( 27 ) in response to the position control signal, and a comparing element ( 58 ) for comparing the sensed point to the corresponding point of the expected displacement vs. time curve.