Armstrong S-57-1 Series Cast Iron Centrifugal Pump 3/4HP 1 Phase

Description

Support larger hydronic loops with Armstrong 106285MF-132 S-57-1, a 3/4 HP single-phase cast-iron pump for boiler feed, heavy residential heating, and commercial circulation. Its 115 V configuration and Series S layout suit systems where a cast-iron body and oil-lubricated sleeve bearings are part of the service plan. Confirm the actual curve, flange arrangement, and oiling access before installation.

The pump uses a glass-reinforced Noryl impeller and alloy-steel shaft with copper sleeve within the cast-iron assembly. The supplied data lists approximately 35 to 40 feet of head, but flow, pressure, amp draw, dimensions, weight, exact flange size, and operating temperature were not provided. Verify the curve and maintenance requirements before startup.

Key Features & Benefits

• 3/4 HP Motor: Supports boiler-feed and heavy hydronic heating circulation.
• 115 V Single-Phase: Fits compatible residential and light commercial service panels.
• Cast-Iron Body: Provides the specified casing material for heating-loop applications.
• Noryl Impeller: Provides the listed glass-reinforced rotating material for the pump assembly.
• Alloy-Steel Shaft: Uses a copper sleeve within the specified rotating arrangement.
• Oil-Lubricated Sleeve Bearings: Require planned lubrication and accessible service points.
• 35 to 40 Feet Listed Head: Provides a selection reference for higher-resistance heating loops.
• Series S Flange: Requires verification against the existing piping and connection hardware.

Why Choose Armstrong 106285MF-132 S-57-1

The S-57-1 gives residential and commercial heating contractors a larger 3/4 HP cast-iron circulator with an oil-service bearing arrangement for planned maintenance.

• Build: Cast iron, Noryl impeller, copper-sleeved shaft, and sleeve-bearing construction define the supplied pump.
• Value: The listed head range helps contractors compare the pump with boiler and hydronic resistance.
• Audience: Suited to boiler technicians, residential HVAC contractors, property managers, and commercial maintenance teams.

Applications & Use Cases

Use Armstrong 106285MF-132 S-57-1 for boiler feed, heavy residential hydronic heating, commercial loops, and compatible Series S piping. The supplied listing gives approximately 35 to 40 feet of head but does not provide dimensions, weight, port reach, or exact flange measurements. Verify oiling access, valve clearance, pipe support, and service space before installation.

Warranty & Support

• Warranty Terms Require Confirmation: Verify duration, coverage, registration, exclusions, and authorized service requirements with Armstrong or the seller.
• Match SKU 106285MF-132, S-57-1 model, horsepower, 115 V supply, impeller, shaft, bearing, and flange details before ordering.

Fill and purge the loop, inspect the Noryl impeller and shaft sleeve, lubricate the bearings according to the service instructions, and verify the 115 V supply before startup. Monitor vibration, temperature, noise, leakage, and operating head during commissioning. Purchase the Armstrong 106285MF-132 S-57-1 cast-iron hydronic pump through Mulmotor.com for authentic equipment, applicable warranty support, and pump assistance.