Armstrong 106285MF-742 - S-57-1 Cast Iron Circulator Pump, 3/4 HP, Single-Phase, ECM Motor
Armstrong 106285MF-742 - S-57-1 Cast Iron Circulator Pump, 3/4 HP, Single-Phase, ECM Motor
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Designed to deliver reliable circulation for residential and light‑commercial hydronic heating systems, this robust cast‑iron pump ensures consistent flow and temperature stability. The 106285MF-742 Armstrong S‑57‑1 model pairs a 3/4 HP single‑phase ECM motor with a bronze‑fitted cast‑iron body for long‑lasting performance.
The pump operates by converting motor torque into steady water movement through a volute and diffuser configuration, allowing the ECM controller to modulate speed for exact flow set‑points while minimizing energy consumption.
Key System Performance Baselines:
- Flow Rate: up to 25 GPM, supporting typical zone heating loops.
- Head Capacity: delivers up to 30 ft of head for efficient pressure overcoming.
- Energy Efficiency: ECM motor reduces electricity use by up to 40% compared to standard induction motors.
- Durability: bronze‑fitted cast‑iron construction resists corrosion and wear.
- Noise Level: low‑vibration design provides quiet operation.
⚠️ Application Profile: Ideal for boiler return circulation, radiant floor loops, domestic hot water recirculation, and small‑scale commercial boiler systems.
| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | 106285MF-742 |
| Model Designation | S-57-1 |
| Body Construction | Cast Iron, bronze‑fitted |
| Motor Type | Single‑phase ECM |
| Motor Power | 3/4 HP |
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