The 1st vacuum regulator which is maintained the vacuum blower (11) with, the milking device (15) with, the pipe which connects with the said milking device and the said vacuum blower (14) with, the vacuum level which is set beforehand in the milking device (25) with it possesses the milking system. The 2nd vacuum regulator (27 and 29, 30a), it is provided with the 1st vacuum regulator and the vacuum blower, it adjusts the vacuum level which is set beforehand desire level. As for the particular 2nd vacuum regulator, the pressure sensor in order to measure the vacuum level inside the milking system (30a) with, sucking the air, adjustment possible inhalation expedient in order to lead to the pipe (31), for example, the control control equipment which controls the 2nd vacuum regulator according to the solenoid valve and the vacuum level which was measured (29) with it is desirable to possess.搾乳システムは、真空ポンプ(11)と、搾乳装置(15)と、該搾乳装置と該真空ポンプとを連結する導管(14)と、あらかじめ設定された負圧レベルを搾乳装置において維持する第1真空調整器(25)とを有する。第2真空調整器(27、29、30a)は、第1真空調整器と真空ポンプとの間に設けられており、あらかじめ設定された真空レベルを所望レベルに調整する。当該第2真空調整器は、搾乳システム内の負圧レベルを測定するための圧力センサ(30a)と、空気を吸入して導管へ導くための調整可能な吸気手段(31)、例えば、電磁弁と、測定された負圧レベルに応じて第2真空調整器を制御する制御装置(29)とを有することが好ましい。
