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 / Caria, Maria; Murgia, Lelia; Pazzona, Antonio Luigi; Sistu, Luisella. - 6:Suppl. 1(2007), pp. 574-576. [10.4081/ijas.2007.1s.574]

Effects of low vacuum levels on vacuum dynamics during milking

Caria, Maria;Murgia, Lelia;Pazzona, Antonio Luigi;Sistu, Luisella
2007-01-01

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.
2007
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]
File in questo prodotto:
File Dimensione Formato  
Pazzona_A_Articolo_2007_Effects.pdf

accesso aperto

Tipologia: Versione editoriale (versione finale pubblicata)
Licenza: Non specificato
Dimensione 757.7 kB
Formato Adobe PDF
757.7 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/262962
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact