Armstrong 104301-011 - 1-1/2" NPT Cast Iron Pump Flange
Armstrong 104301-011 - 1-1/2" NPT Cast Iron Pump Flange
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This heavy‑duty cast‑iron flange provides a secure, leak‑free seal for 1‑1/2" NPT pipe connections in commercial and industrial heating systems. It is fully compatible with Armstrong equipment and replaces the original 104301-011 part.
The flange’s precision‑milled faceplate mates directly with the pipe’s thread, creating a metal‑to‑metal interface that distributes pressure evenly, while the integrated gasket seat ensures a tight seal even under high‑temperature cycles.
Key System Performance Baselines:
- Material Durability: Cast iron construction resists corrosion and thermal stress.
- Connection Size: 1‑1/2" NPT thread matches standard pipe dimensions.
- Pressure Rating: Engineered for up to 150 psi in closed‑loop systems.
- Temperature Range: Operates reliably from -20°F to 250°F.
⚠️ Application Profile: Suitable for boiler return lines, hot‑water heating loops, chilled water systems, and retrofits of aging pipework.
| Performance Parameter | Engineering Baseline Value |
|---|---|
| Manufacturer Part Number (MPN) | 104301-011 |
| Model Designation | Armstrong 104301-011 |
| Connection Size | 1-1/2" NPT |
| Body Construction | Cast Iron |
| Pressure Rating | 150 psi |
| Temperature Range | -20°F to 250°F |
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Formal Purchase Orders (POs) and tax-exempt ordering are accepted for commercial contractors and institutional facilities.
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