The invention relates to milking equipment (10) comprising at least one, in particular four teat cups (12), wherein each teat cup (12) has a cup housing (14) and a teat cup liner (16), accommodated in the cup housing (14), having a head region (18) and a suction region (20). At the cup bottom (22) or at the end of the suction region (20) of the teat cup liner (16) there is a connection (26) for a milk tube (24). It is proposed that a mouth portion (32) of a sterile-air pressure line (34) be arranged in the head region (18) of the teat cup liner (16), sterile air with a volumetric flow rate (Vs) greater than a fluid extraction volumetric flow rate (Vm) at the milk tube (24) being passable through said sterile-air pressure line (34), such that a sterile-air overlay (84) is established in the head region (18) of the teat cup liner (16). In secondary aspects, the invention relates to a milking installation (60), to a teat cup liner (16) for the milking equipment (10) and to a milking method with sterile-air overlay. The invention prevents milked milk from being contaminated by contaminants and germs in the stable air, and so increased durability of untreated raw milk can be achieved.
