Low Flow Horizontal Process Pump
Product Details
| Application | Chemical dosing, boiler feed, condensate return, high-head low-flow transfer, seal flush systems |
| Flow Rate | Up to 210 GPM (48 m³/h) |
| Head Range | Up to 920 ft (280 m) |
| Temperature | -50°F to 600°F (-46°C to 316°C) |
| Materials | Carbon Steel ASTM A216 (WCB), 316L SS, CD4MCuN, Hastelloy C-276, Alloy 20, Titanium, Zirconium |
| Pressure Rating | Up to 400 PSI (27.5 bar) |
Low Flow Horizontal Process Pump — Concentric Casing Design
This single-stage, horizontal centrifugal pump is engineered for applications requiring stable, reliable operation at low flow rates with high differential heads. Its unique concentric (non-volute) circular casing with a precision-machined discharge channel delivers smooth performance curves without the hydraulic instabilities common in conventional volute pumps at low flows — making it a proven alternative to multi-stage pumps in many services.
Key Design Features
- Concentric circular casing — eliminates radial thrust at off-design conditions; precisely machined discharge channel ensures repeatable hydraulic performance
- Fully shrouded multi-vane open radial impeller (Barske-style) — inherently stable head-capacity curve with no hump or dip, even at minimum continuous flow
- Back pull-out construction — impeller, shaft, and bearing assembly removable as a single unit without disturbing casing or piping
- Impeller balance holes — reduce stuffing box pressure, extend seal life, and lower axial thrust on bearings
- 316 Stainless Steel shaft — rigid, corrosion-resistant, standard at no extra cost
- Flinger disk oil lubrication — 30% increased bearing L-10 life, approximately 15°F lower operating temperatures vs. flood oil designs
Performance Range
| Parameter | Maximum |
|---|---|
| Flow Capacity | 210 GPM (48 m³/h) |
| Head | 920 ft (280 m) |
| Pressure Rating | 400 PSI (27.5 bar) |
| Temperature | -50°F to 600°F (-46°C to 316°C) |
| Speed | Up to 3,600 RPM |
| Discharge Size | 1″ to 1.5″ (25–38 mm) |
Materials of Construction
| Component | Standard | Optional |
|---|---|---|
| Casing & Frame Adapter | Carbon Steel | 316L SS, CD4MCuN, Hastelloy C-276, Alloy 20 |
| Impeller | Carbon Steel | 316L SS, CD4MCuN, Hastelloy C-276, Titanium |
| Shaft | 316 Stainless Steel | Duplex, Hastelloy C-276 |
| Bearing Frame | Carbon Steel (finned) | — |
Sealing Options
Multiple ANSI seal chamber configurations support packing, single mechanical seals, and double mechanical seals. All standard ANSI/API flush plans are available. Impeller balance holes work in conjunction with the seal chamber to minimize stuffing box pressure throughout the operating range.
Bearing & Reliability
- Bearing system exceeds ANSI B73.1 L-10 life specifications
- Flinger disk lubrication — sealed, low-maintenance design
- Dual oil level sight glasses for easy visual inspection
- 5-year unconditional bearing frame warranty
Typical Applications
- Chemical Processing: Catalyst injection, chemical dosing, seal flush, sampling systems
- Petrochemical & Refining: Condensate return, amine circulation, reflux services
- Power Generation: Boiler feed supplement, cooling water booster, fuel oil transfer
- Pharmaceutical: High-head solvent transfer, purified water circulation
- General Industry: Any low-flow, high-head service where multi-stage pumps are oversized or uneconomical
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