Product Description
Dean RWA4206 4x6x10 #1 Heavy-Duty High-Temperature Hot Water & Glycol Pump
The Dean RWA4206 (4x6x10 #1) is a heavy-duty, pedestal-mounted centrifugal pump engineered for high-flow pressurized hot water, ethylene glycol, and propylene glycol loops up to 400°F (204°C) and 450 PSIG without external cooling water. Built on the heavy-duty 1.875" shaft frame (Print RA-2002) with 4" × 6" ASME Class 300 RF flanges, it includes a top-mounted 304SS Vapor Eliminator (SKU 9320215), a John Crane hot-water mechanical seal with Aflas elastomers, a 316SS dry shaft sleeve, and a PLS10 Teflon casing gasket.
Key Engineering Highlights:
- High-Flow Hot Water & Glycol Service (To 400°F / 450 PSIG): Purpose-built for large central heating, district energy, and process glycol loops without external seal flush water.
- 304SS Top-Mounted Vapor Eliminator (#26J, SKU 9320215): Vents entrained air and flash vapor from the seal chamber continuously to protect the mechanical seal faces.
- Hot-Water Mechanical Seal, 316SS Dry Sleeve & Teflon Casing Gasket: Prevents shaft corrosion and gasket blowout in high-temperature water and glycol service.
- Heavy-Duty Pedestal Frame (Print RA-2002): 1.875" coupling shaft (P/N 1138163) with duplex 7311 angular-contact thrust bearings (P/N 9010202) and 4" × 6" Class 300 RF Ductile Iron casing.
- Overhaul Shaft Repair Kit (SKU 6138183): Complete OEM overhaul kit, typical lead time 4-5 weeks.
Standard Materials of Construction & Operating Limits (Class 22):
| Component | Material / Specification |
|---|---|
| Casing & Bearing Housing (#5 / #26) | Ductile Iron ASTM A395 (Class 22) |
| Vapor Eliminator (#26J) | 304 Stainless Steel Top-Mounted Air/Vapor Release — SKU 9320215 |
| Impeller (#3) | Cast Iron ASTM A48, Enclosed, Dynamically Balanced |
| Pump Shaft (#29) & Sleeve (#10) | 420 SS Shaft (P/N 1138163, 1.875" Coupling) with 316SS Hook Sleeve |
| Outboard Thrust Bearings (#25A) | Duplex 7311 Angular-Contact Ball Bearings — P/N 9010202 |
| Mechanical Seal (#95A/B) | John Crane Hot-Water Seal (SiC / Carbon / Aflas) |
| Casing Gasket (#77) | PLS10 Teflon Hot-Water / Glycol Casing Gasket |
| Max Temperature & Pressure | 400°F (204°C) Hot Water & Glycol · 450 PSIG Working Pressure |
Matching Overhaul Repair Kit & Replacement Parts
Complete OEM overhaul kit for the Dean RWA4206 4x6x10 #1:
