Product Description
Dean RA3146 Centerline-Mounted Air-Cooled Thermal Liquid / Hot Oil Pump
The Dean RA3146 is an air-cooled, centerline-mounted centrifugal process pump engineered for continuous thermal fluid, hot oil, and heat-transfer systems operating up to 650°F (343°C) without external cooling water. Available across 14 pump sizes in 8.5", 10", and 11.5" impeller families with ASME Class 300 Raised Face flanges, the RA3146 prevents thermal distortion and preserves shaft alignment across elevated temperature swings.
Key Engineering Highlights:
- Air-Cooled to 650°F (No Cooling Water Required): Integral cast cooling fins and a shaft-driven radial cooling fan (#120, P/N 1280016) dissipate heat without cooling water lines, jacket scaling, or utility costs.
- Centerline Yoke-Mounted Casing (Print RA3001): Class 22 Ductile Iron volute casing with ASME B16.5 Class 300 RF flanges is supported at the horizontal centerline to maintain coupling alignment up to 650°F.
- Dimensionally Interchangeable with Dean R4140 Series: Direct drop-in replacement for water-cooled Dean R4140 footprints (D = 8.25" on 8.5"/10" sizes; D = 10.00" on 11.5" sizes) and mounts on standard ANSI B73.1 baseplates.
- Proven High-Temperature Shaft, Seal & Bearing System: 420 SS shaft (#29, P/N 1138149, 1.125" coupling diameter) supported by an inboard carbon/stainless radial sleeve bearing (#180, P/N 6010100), duplex angular-contact thrust bearings (#25A, P/N 9010145), and a balanced hot-oil mechanical seal (#95A/B, P/N 6765942).
- Stocked Bare Pumps, Baseplates & Motor Packages: Configurable above as a bare shaft pump or complete pump-set on an ANSI channel or drip-rim baseplate with spacer coupling and TEFC motor.
Standard Materials of Construction & Operating Limits (Class 22):
| Component | Material / Specification |
|---|---|
| Casing & Bearing Housing (#5 / #26) | Ductile Iron ASTM A395 (Class 22) — P/N 1082564 |
| Impeller (#3) | Cast Iron ASTM A48, Enclosed, Dynamically Balanced |
| Pump Shaft (#29) | 420 Stainless Steel — P/N 1138149 (1.125" Coupling) |
| Inboard Sleeve Bearing (#180) | Carbon / Stainless Steel Bushing — P/N 6010100 |
| Outboard Thrust Bearings (#25A) | Duplex Angular-Contact Ball Bearings — P/N 9010145 |
| Mechanical Seal (#95A/B) | Balanced High-Temp Hot-Oil Seal — P/N 6765942 |
| Casing Gasket (#77) | Graphoil GRA01 — P/N 9155912 (8.5") / P/N 9156091 (10") |
| Max Temperature & Pressure | 650°F (343°C) Air-Cooled · 350 PSIG Working Pressure |
Matching Overhaul Repair Kits & Interactive Parts Diagram
Match the impeller casing family on your pump nameplate, or use the Interactive Exploded-View Parts Finder and RA Series Outline Dimensions.
