Armstrong’s Astro Circulator is intended for circulating water or ethylene glycol solutions in closed hydronic or solar heating systems. The Astro series is available in two models for residential, small industrial and commercial installations. View the current product for this application.
This line of Armstrong Astro Series Circulators has been discontinued. However, related data and documentation are still available for download below. Also, please see our current products for related applications at the bottom of this page.
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Astro 2 Circulators
Astro 2 Hot Water
Astro Express 2 Hot Water
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