Product Description
Dean RA3186 Heavy-Duty Pedestal-Mounted Air-Cooled Thermal Liquid / Hot Oil Pump
The Dean RA3186 is a high-flow, pedestal-mounted air-cooled centrifugal process pump engineered for large thermal fluid heaters and high-temperature circulation loops up to 650°F (343°C) without external cooling water. Available across 8 heavy-duty pump sizes in 10", 12.5", 13.5", and 15.5" impeller families with ASME Class 300 Raised Face flanges (Print RA-2002), it is dimensionally interchangeable with water-cooled Dean R4180 / R450 Series pumps.
Key Engineering Highlights:
- High-Capacity Air-Cooled Operation to 650°F: Integral finned bearing frame and shaft-driven radial cooling fan eliminate cooling water supply and drain lines on large heater loops.
- Pedestal-Mounted Class 300 RF Casing (Print RA-2002): Heavy-wall Class 22 Ductile Iron volute casing with ASME B16.5 Class 300 RF flanges and back pull-out construction.
- Dimensionally Interchangeable with Dean R4180 / R450 Series: Direct drop-in replacement for legacy water-cooled Dean R4180 / R450 footprints.
- Heavy-Duty 1.875" Shaft & Duplex 7311 Thrust Bearings: High-strength shaft (#29, P/N 1138163, 1.875" coupling diameter) supported by an inboard sleeve bushing and duplex angular-contact thrust bearings (#25A, P/N 9010202).
- Stocked Bare Pumps, Baseplates & Motor Packages: Configurable above as a bare shaft pump or complete skid-mounted pump package 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) |
| Impeller (#3) | Cast Iron ASTM A48, Enclosed, Dynamically Balanced |
| Pump Shaft (#29) | 420 Stainless Steel — P/N 1138163 (1.875" Coupling) |
| Outboard Thrust Bearings (#25A) | Duplex 7311 Angular-Contact Ball Bearings — P/N 9010202 |
| Bearing Locknut / Retainer | Heavy-Duty Shaft Hardware — P/N 1762483 |
| Max Temperature & Pressure | 650°F (343°C) Air-Cooled · 350 PSIG Working Pressure |
Matching Overhaul Repair Kit & Outline Dimensions
Stocked overhaul kit for the RA3186 4x6x10 #1 and outline drawings for all sizes (RA Series Outline Dimensions):
