Publication Date:
2007
Short description:
Effects of low vacuum levels on vacuum dynamics during milking / Caria, Maria; Murgia, Lelia; Pazzona, Antonio Luigi; Sistu, Luisella. - 6:Suppl. 1(2007), pp. 574-576. [10.4081/ijas.2007.1s.574]
abstract:
One of critical points of the milking unit is the short milk tube. Here milk plugs can cause abrupt
variations in vacuum which are stressful for the animals. Our trials allowed us to define the effects of the operational
vacuum and pulsation on vacuum stability in the short milk tube. Reducing the vacuum from 42 to 28 kPa
did not produce appreciable variations in vacuum fluctuation. It was 9.2 kPa for the low vacuum and 9.8 kPa for
the standard vacuum. Changing the pulsation rate from 150 to 120 cycles/min did not modify the vacuum stability
in the short milk tube. By contrast, raising the pulsation ratio from 50% to 60% significantly increased the amplitude
of vacuum fluctuation in the short milk tube.
variations in vacuum which are stressful for the animals. Our trials allowed us to define the effects of the operational
vacuum and pulsation on vacuum stability in the short milk tube. Reducing the vacuum from 42 to 28 kPa
did not produce appreciable variations in vacuum fluctuation. It was 9.2 kPa for the low vacuum and 9.8 kPa for
the standard vacuum. Changing the pulsation rate from 150 to 120 cycles/min did not modify the vacuum stability
in the short milk tube. By contrast, raising the pulsation ratio from 50% to 60% significantly increased the amplitude
of vacuum fluctuation in the short milk tube.
Iris type:
1.1 Articolo in rivista
Keywords:
Operative parameters; vacuum fluctuation; sheep; milking
List of contributors: