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Armstrong’s Astro 2 Series Wet Rotor Circulator Pumps bring adaptability to a new level. Designed to move liquids through closed hydronic or solar heating systems efficiently and with minimal maintenance, these three-speed circulators allow users to match a wide range of application requirements. Rated at 1/25th hp and 115 volts, with a rated flow of zero to 18 gallons per minute and a rated head of zero to 18 feet, the Armstrong 230 is a three-speed pump, designed to handle today’s most common pump applications. Models are available with union, sweat, or rotated flange connections for easy installation in even the tightest corners. Integral check valves prevent backflow and eliminate the need for discrete check valve addition, minimizing installation and maintenance costs. (more…)