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Series 4270 | Close Coupled Horizontal | 0.33 to 60 HP | 60 Hz
The Armstrong 4270 close-coupled horizontal pumps are motor mounted and designed for long service life and easy maintenance. They suit building services pumping such as cooling towers, HVAC and general purpose. This page covers the 60 Hz models, including the stock 42ST.
| Manufacturer | Armstrong Fluid Technology |
|---|---|
| Series | 4270 & 4270 Stock Motor Mounted Pumps |
| Pump Type | Close-coupled horizontal, motor mounted |
| Applications | Building services: cooling towers, HVAC, general purpose |
| Frequency | 60 Hz models (this page) |
| Materials | Cast iron with ULTEM impeller; 416 stainless steel shaft |
| Seal Configuration | Inside single-spring mechanical seal, bronze-fitted |
| Speed | Designed for 3,600 RPM (1,800 RPM optional) |
| Flow | Up to 3,600 USgpm (227 L/s) |
| Head | Up to 130 ft (40 m) |
| Temperature | 275°F (135°C) |
| Power Range | 0.33 HP to 60 HP (0.25 kW to 45 kW) |
| Pump Size | 1.25", 1.5", 2" (32 mm, 38 mm, 51 mm) |
Performance curves and dimensions are included in the submittals.
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 4270 performing to specification.