Aurora 3550 ANSI Replacement Pump
100% dimensionally interchangeable with Pentair Aurora 3550 (S/M/L/XL)
Heavy-duty oversized shaft reduces vibration and deflection
Duplex angular contact thrust bearings for extended service life
Product Details
| Application | Chemical, mining, pulp and paper, consumer products, general industry |
| Flow Rate | Up to 4,200 GPM (954 m3/h) |
| Head Range | Up to 725 ft (221 m) |
| Temperature | Up to 650F (343C) |
| Materials | Ductile Iron, 316SS, Alloy 20, CD4MCu, Titanium, Hastelloy B and C |
| Pressure Rating | 375 PSIG |
Performance Comparison: Aurora 3550 vs ANSI Pumps Pro
The Aurora 3550 is Pentair’s heavy-duty ASME/ANSI B73.1 process pump, available in 24 frame sizes across S, M/L, and XL families. Our replacement matches every frame size with 100% dimensional interchangeability.
| Parameter | Aurora 3550 (Pentair) | ANSI Pumps Pro Equivalent |
|---|---|---|
| Max Flow Rate | 4,200 GPM (954 m³/h) | 4,500+ GPM |
| Max Head | 725 ft (221 m) | 730 ft (223 m) |
| Max Temperature | 650°F (343°C) | 700°F (371°C) ✅ |
| Max Pressure | 375 PSIG | 375 PSIG |
| Frame Sizes | S (1.1 HP/100rpm), M/L (3.4/5.6), XL (14) | S, M, L, XL — identical power ratings |
| Bearing Type | Heavy-duty; optional duplex angular contact | Duplex 40° angular contact standard ✅ |
| Shaft | Over-sized, reduced deflection | 316L SS oversized shaft standard |
| Oil Seals | Labyrinth oil seals | ISOMAG™ magnetic bearing isolators (IP65) |
| Warranty | Standard | 5-year unconditional power frame |
| Lead Time | Industry standard 14-18 weeks | 6-10 weeks |
100% Dimensional Interchangeability
Our Aurora 3550 replacement is engineered for complete drop-in compatibility across all frame families:
- 3550-S (Small Frame): 1.1 HP/100 RPM power limit — identical foot pattern, shaft centerline height, and flange dimensions
- 3550-M (Medium Frame): 3.4 HP/100 RPM — interchangeable casing, impeller, stuffing box, and bearing housing
- 3550-L (Large Frame): 5.6 HP/100 RPM — full dimensional parity including seal chamber and adapter
- 3550-XL (Extra Large Frame): 14 HP/100 RPM — heavy-duty power frame with identical baseplate bolt pattern
- Duplex thrust bearings (40°/40° angular contact) come standard — an upgrade from Aurora’s optional offering
- Full parts interchangeability with Goulds 3196 STX, MTX, and XLT-X — same as Aurora 3550
Material Cross-Reference
| Alloy | Aurora 3550 | ANSI Pumps Pro |
|---|---|---|
| Ductile Iron | ✔ | ✔ (ASTM A536) |
| 316 Stainless Steel | ✔ | ✔ (CF8M) |
| Alloy 20 | ✔ | ✔ (CN7M) |
| CD4MCu (Duplex) | ✔ | ✔ (CD4MCuN 1B) |
| Titanium | ✔ | ✔ (Grade 2) |
| Hastelloy B | ✔ | ✔ |
| Hastelloy C | ✔ | ✔ (C-276) |
| Shaft Material | Standard alloy steel | 316L SS standard (included at no extra cost) |
Why ANSI Pumps Pro for Aurora 3550 Replacement?
- Higher Temperature Rating: 700°F vs. Aurora’s 650°F — safely handle higher-temperature process fluids
- Duplex Bearings Standard: 40°/40° angular contact thrust bearings included on all frames — no upcharge
- Magnetic Bearing Isolators: ISOMAG™ IP65-rated isolators prevent external contamination ingress better than labyrinth seals
- Larger Oil Sump: Increased oil volume for cooler bearing operation and longer service intervals
- Heavy-Duty Casing: Wall thickness exceeds ASME B73.1 minimum requirements for maximum reliability
- Full MTR Traceability: EN 10204 3.1 material certification with PMI verification on every shipment
Request a quote → for Aurora 3550 replacement with frame-specific dimensional drawings and performance curves.
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