Standard Features

A hydronic circulator that conserves energy and eliminates maintenance. Armstrong’s Astro Circulator is intended for circulating water or ethylene glycol solutions in closed hydronic or solar heating systems. It is designed with no mechanical seals or couplers to replace, and no lubrication is required. The Astro series is available in two models for residential, small industrial and commercial installations. Choose from cast iron or bronze models for solar and domestic applications.

• Efficient/Quiet Operation
• Universal Flange to Flange Dimension
• Cast Iron or All Bronze Construction
• UL and CSA Listed
• No mechanical seals to leak
• No couplers to break
• No lubrication
• Noryl impeller
• Vent plug for initial purging if required
• Stainless Steel shaft
• Ethylene Propylene gaskets
• Impedance protected motor