110223-328 Armstrong Astro 290CI Cast Iron Circulating Pump

110223-328 Armstrong Astro 290CI Cast Iron Circulating Pump. The Armstrong Astro 2 circulators are designed for quiet operation and zero maintenance. In combination with cast iron volutes the Astro 2 line is intended to circulate water or ethylene-glycol solutions in closed hydronic or solar heating systems. The Astro 2 line is available in three volute materials for residential, small industrial, and commercial applications.