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.

Effects of low vacuum levels on vacuum dynamics during milking / Pazzona, Antonio Luigi; Caria, Maria; Murgia, Lelia; Sistu, L.. - In: ITALIAN JOURNAL OF ANIMAL SCIENCE. - ISSN 1594-4077. - 6 (suppl. 1):(2007), pp. 574-576. [10.4081/ijas.2007]

Effects of low vacuum levels on vacuum dynamics during milking

PAZZONA, Antonio Luigi;CARIA, Maria;MURGIA, Lelia;
2007

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.
Effects of low vacuum levels on vacuum dynamics during milking / Pazzona, Antonio Luigi; Caria, Maria; Murgia, Lelia; Sistu, L.. - In: ITALIAN JOURNAL OF ANIMAL SCIENCE. - ISSN 1594-4077. - 6 (suppl. 1):(2007), pp. 574-576. [10.4081/ijas.2007]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11388/82724
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