The Duovac milking machine (similar to DeLaval) has a dual vacuum function and the HP102 is controlled by the cow's milk flow. The uniqueness of the Duovac function (double vacuum) is the vacuum conversion according to the individual characteristics of the physiological milkinjg process of each cow. The result: fast and full milking, high quality milk and healthy cows. Imkproved head health through the use of a double vacuum mijlking machine (double vacuum) reduces the risk of traumatic mastitis and avoids dry milking.