Install the Spirovent® at the point of lowest solubility, which is the place in the system where the temperature is the highest and pressure the lowest. Note as well to always "pump away" from the expansion tank, never towards it.
Related Work
University of Missouri - Columbia, MO
The University of Missouri, Columbia is home to the second of the world's largest Spirovent® combination air eliminator and dirt separator.
Higher-Ed Gallery
For almost two decades Spirotherm® has been working with facilities departments to provide solutions for problem systems.
Unocal - Pacific Northwest, US
4" Spirovent® air eliminator being used to control foam in a bottling operation for transmission fluid and motor oil.