Milking machine trap

Differences in vacuum levels between the receiver and regulator should not exceed 0.2" Hg. The most common cause of ineffective vacuum regulation is an excessive vacuum difference between the receiver and regulator because of either improper regulator location, or excessive restrictions in pipelines and fittings between these two components. The regulator should be connected near the sanitary trap so it can sense and quickly respond to vacuum changes caused by unplanned air admission entering the system through the teat cups. A regulator mounted on or near the distribution tank tends to oscillate because of the cyclic vacuum changes produces in the pulsator airlines.