Important for performance and gentle on the udder: A constant milking vacuum is much more than a mere calculation of pump capacity and milk line diameter! 

The recommended air flow depends on national and international standards. The papers of DIN ISO 5707, give some direction with air flow calculation sheet based on number of milking clusters used in the installation. 

WestfaliaSurge vacuum technology is the prerequisite for gentle, animal-friendly milking: Low vacuum means less stress for teats which is a great benefit for udder health. 

The second prerequisite for successful milking is a constant vacuum: Many years of experience have lead to a parlour layout which matches pump capacity to certain pipeline diameters with the goal to get a constant vacuum in all parts of the milking installation. This is particularly important for the area between clawpiece and milk line. 

The third factor is a safety issue: Our principal is to provide you with an generous vacuum performance that can compensate easily for sudden and unpredictable vacuum swings due to unexpected air inlets. 

A sample calculation:
When attaching the udder there can be 500 to 600 litres of air sucked into the system through the teat cup shells. In a WestfaliaSurge installation milking is not negatively influenced even when more than one operator attaches clusters at the same time. The operating vacuum fluctuates no more than 2kPa. This is quality design!