Astro 2 Circulators

Product Image
Astro 2 Circulators Isometric
Astro 2 Circulators Front
Astro 2 Circulators SS Isometric
Astro 2 Circulators

  • Summary
  • Applications

    Residential heating or cooling, potable water, water conservation.

  • Description

    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.

  • Materials

    Cast iron, lead-free bronze, or stainless steel volutes

  • Performance range

    0 to 64 USgpm flow; 0 to 42 ft head

  • Temperature

    Max ambient temp 40°C; max fluid temp 110°C

  • Power Range

    33 W to 218 W

  • Size

    ½” - ¾” sweat, 1¼” union, or standard 2 bolt flange

Adjustable performance

  • Three field-selectable speeds to cover a wide performance range
Case studies

Learn how we've helped customers reduce costs, energy usage, and project risks.

Easy electrical connection

  • Simple terminal strip for fast and easy wiring

Easy pump replacement and cross reference

  • Three field-selectable speeds allow replacement of a wide variety of fixed speed circulators 
  • Cross reference for most popular models affixed to packaging saves time when installing a replacement circulator
Service provider

Find a Service Center

Find an authorized Armstrong Service Center in your area.

Learn More


360 Service and Support

Astro 2 Circulators - solution outline

Hydronic Solutions - digital catalog

Energy audits

Energy Analysis

We thoroughly examine how and where energy is being used in your business and buildings and then tell you exactly where efficiencies and savings can be found.

Get started

resources & tools

More Tools

We have a suite of free online support materials and tools. Find the essentials to learn, apply, and maintain Armstrong equipment.

Get started

Contact Us

Contact us

We are happy to help. Discuss your project and product needs with us, check the status of your shipments, or let us save the day in an emergency.

Get in touch