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Series 4280 | Horizontal End Suction | 0.33 to 60 HP | 1" to 6" Sizes | 60 Hz
The Armstrong 4280 horizontal end-suction pumps are equipped with close-coupled motors to minimize footprint requirements. They are built for HVAC-system pumping and light industrial or process pumping. This page covers the 60 Hz models for North American power.
| Manufacturer | Armstrong Fluid Technology |
|---|---|
| Series | 4280 Motor Mounted Pumps |
| Pump Type | Horizontal end-suction (ES), close-coupled motor |
| Applications | HVAC-system pumping; light industrial / process pumping |
| Frequency | 60 Hz models (this page) |
| Casing Material | Cast iron, ductile iron or bronze |
| Impeller Material | Cast iron or bronze |
| Seal Configuration | Inside single-spring mechanical seal, sintered silicon carbide seat |
| Flow | Up to 2,000 USgpm (125 L/s) |
| Head | Up to 400 ft (120 m) |
| Temperature | 250°F (121°C) |
| Power Range | 0.33 HP to 60 HP (0.25 kW to 45 kW) |
| Pump Size | 1" to 6" (25 mm to 150 mm) |
| Motor | NEMA-premium efficiency, suitable for inverter-fed service |
Performance curves and dimensions for each size are included in the model submittals. 60 Hz submittals by pump size:
Armstrong pumps are covered by Armstrong's standard terms of sale and warranty. Review the full terms below for coverage details.
Always use genuine Armstrong parts, including seals, bearings and parts kits, to keep your 4280 performing to specification.