at least one frame delimiting a chamber for the reception of a receptacle to be filled with liquid product;

a protective door at least partially closing said chamber, said chamber housing means for holding a cup adapted to receive the product to be filled at a position located above the position for receiving the receptacle in a position of contact with a valve of the receptacle;

a pusher element housed in said chamber and movable between at least two operative positions to cause, by pressure on liquid contained in the cup, the transfer of the liquid through an opening of said cup into the receptacle; and

a pneumatic or hydraulic control jack, said pusher element forming a rod of said pneumatic or hydraulic control jack, said control jack comprising two chambers each supplied by a passageway, one of the two chambers controlling in a supplied condition an outlet of the rod of the control jack, another of the two chambers controlling an inlet of the rod of the control jack,

wherein a portion of a pneumatic or hydraulic control circuit of the pusher element is integrated with the opening of the protective door controlling the movement of the pusher element between the at least two operative positions, said circuit of the door coinciding with a passageway of the output chamber of the rod of the control jack in a closed position of the protective door and with a passageway of the inlet chamber of the rod of the control jack in an opened position of the protective door.