Pasteurizing group (10) of liquid food mixtures comprising at least one&mdash；pasteurizing device (11, 12), at least one supply duct (13, 14) and at least one outlet duct (15, 16) for said liquid food mixtures associated with said at least one pasteurizing device (11, 12), temperature control means (17, 18) of said liquid food mixtures inside and/or leaving said at least one pasteurizing device (11, 12) and selective blocking means (35, 36) of said at least one outlet duct (15, 16).
