Studies on linear vacuum in high and low level milking systems
2014
Andersons, E., Latvia Univ. of Agriculture, Jelgava (Latvia) | Laurs, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Priekulis, J., Latvia Univ. of Agriculture, Jelgava (Latvia)
For milking cows milking machines with high and low level milking systems are most often used. Milking in the milkline positioned underneath milk from the claw gets into the milkline by self-flow, but in the milkline above additional energy must be used to lift milk in the milkline, i.e., vacuum in the milkline must be higher than in the teatcup. The aim of the research is to state the influence of the position of the milkline in high and low level milking systems on liner vacuum. The experiments were performed in laboratory conditions on a special test bench using water instead of milk. The experiments were carried out in 4 series – with a high level milking system at working vacuum 49 kPa and with a low level milking system at working vacuum 49; 44 and 41 kPa. In every series 3 experiments were made at the water flow rate 0.6; 3.5 and 6.3 kg•minE-1. In the research it was stated that milking with high level milking systems the working vacuum should be 50 kPa, but milking with low level milking systems the working vacuum – 43 kPa.
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