WASHER IN VACUUM PIPING-TYPE MILKING MACHINE

PROBLEM TO BE SOLVED: To inexpensively provide a washer capable of readily automatizing without re-polluting a milking machine by washing water circulated in a piping in a washer of a vacuum-type milking machine. SOLUTION: This vacuum-type milking machine has a washing tank 20 and a washing water supplying means 90. The washing water aspirated from the washing tank is circulate in the milking machine and discharged from a discharging pipe 22 connected to a milk pump 102. In the case, a branched pipe 24 formed by branching the discharging pipe to two parts is connected to a draining port and water in the other pipe is discharged to a draining path 29 through a draining valve 23. A check valve having a movable valve balancing at a valve-opening position by pressure of a vertical spring is installed in the draining port. Then, flowing out and re-circulating of water can be selected by selecting open and closing of the draining valve and remaining water in a bottom part of the washing tank is discharged by opening the draining port by the movable valve against water pressure by pressure of the spring when its water level is lower than a constant level.