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3/4 HP, 208-230/460Vac, Three Phase, Cast Iron Body with Non-Ferrous Impeller, Permanently Lubricated Maintenance Free Bearings Circulator Pump used with 3" Flanges (Model S57BF)

Armstrong Fluid Technology 106285MF-136A Circulator Pump – 3/4 HP, 3-Phase, Cast Iron, Model S57BF

The Armstrong Fluid Technology 106285MF-136A is a high-performance in-line circulator pump engineered for reliable operation in demanding HVAC and industrial fluid handling systems. Also known as Model S57BF, this 3/4 HP circulator pump features a rugged cast iron body with a non-ferrous impeller, delivering long-lasting durability and efficient fluid movement in closed-loop systems.

Designed for versatility and performance, this Armstrong Series S & H pump operates on 208-230/460 VAC, three-phase power and includes permanently lubricated, maintenance-free bearings, reducing service requirements and downtime. It is built for use with 3-inch flanges, making it ideal for medium to large hydronic and water circulation applications.

Armstrong in-line circulators have been trusted by HVAC professionals for decades, known for their dependable construction and consistent performance in both commercial and industrial environments.

Key Features

• Model: 106285MF-136A (S57BF)

• Horsepower: 3/4 HP

• Voltage: 208-230/460 VAC

• Phase: Three Phase

• Construction: Cast iron body with non-ferrous impeller

• Bearings: Permanently lubricated, maintenance-free

• Connection Size: Designed for 3" flanges

• Series: Armstrong Series S & H

Typical Applications

• Hydronic heating systems

• Chilled water and cooling loops

• Domestic water circulation

• Multi-stage zoning systems

• General industrial fluid transfer

Why Choose Armstrong Circulator Pumps?

Armstrong Fluid Technology pumps are recognized worldwide for their energy efficiency, durability, and long service life. The Series S & H in-line circulators are designed to meet a broad range of performance requirements, with bronze-fitted and all-bronze options available across the product line. Their time-tested design makes them a top choice for engineers, contractors, and facility maintenance professionals.

Upgrade your system with the Armstrong 106285MF-136A circulator pump for dependable, maintenance-friendly performance in commercial and industrial applications.