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Effects of low vacuum levels on vacuum dynamics during milking

Pazzona, Antonio Luigi and Caria, Maria and Murgia, Lelia and Sistu, Luisella (2007) Effects of low vacuum levels on vacuum dynamics during milking. Italian Journal of Animal Science, Vol. 6 (Suppl. 1), p. 574-576. eISSN 1828-051X. Article.

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DOI: 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.

Item Type:Article
ID Code:955
Status:Published
Refereed:Yes
Uncontrolled Keywords:Operative parameters, vacuum fluctuation, sheep, milking
Subjects:Area 07 - Scienze agrarie e veterinarie > AGR/09 Meccanica agraria
Divisions:001 Università di Sassari > 01 Dipartimenti > Ingegneria del territorio
Publisher:Avenue media on behalf of Scientific Association of Animal Production (ASPA)
eISSN:1828-051X
Publisher Policy:Depositato per gentile concessione dell'ASPA
Additional Information:Relazione presentata al 17. Congresso nazionale ASPA, Alghero, 29 maggio-1 giugno 2007.
Deposited On:18 Aug 2009 10:03

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