3196LF Low Flow Process Pump
Concentric casing with radial vane impeller — inherently stable low-flow curve with no hump, operating smoothly from 10% to 100% BEP
Oversized shaft & bearing system — maximum shaft deflection of 0.002″; duplex angular contact thrust bearings for longer L-10 life
TaperBore™ seal chamber — improved flow circulation around seal faces for extended mechanical seal life in low-flow, high-head conditions
Product Details
| Application | Chemical dosing, seal flush, sampling systems, condensate return, boiler feed, heat transfer fluid, catalyst injection |
| Flow Rate | Up to 220 GPM (50 m³/h) |
| Head Range | Up to 925 ft (282 m) |
| Temperature | Up to 700°F (371°C) |
| Materials | Ductile Iron / 316SS Trim, All 316SS (CF-8M), CD4MCuN Duplex, Alloy 20, Hastelloy B & C |
| Pressure Rating | Up to 450 PSIG (31 bar) |
3196LF Low Flow Process Pump — Precision Performance at Low Flow Rates
The 3196LF is specifically engineered for low-flow, high-head applications where standard ANSI pumps operate inefficiently. Its concentric casing and radial vane impeller deliver a stable, continuously rising head-capacity curve — free of the humps and instabilities that plague conventional volute pumps at reduced flows. From chemical dosing to high-pressure seal flush, the 3196LF provides reliable performance where precision matters most.
Key Design Features
- Concentric circular casing — eliminates radial thrust variation across the entire flow range; smooth, stable operation from minimum continuous flow to BEP
- Radial vane impeller — inherently stable curve shape with continuous rise to shutoff; no unstable operating zones
- Back pull-out construction — complete rotating assembly removable without disturbing casing or pipe connections
- External impeller adjustment — clearance set in minutes to restore peak efficiency after wear
- Oversized shaft diameters — maximum deflection limited to 0.002″ (0.05 mm) across the entire operating range
- Duplex angular contact thrust bearings — paired back-to-back for maximum thrust capacity in both directions
- 0.125″ (3 mm) corrosion allowance on casing — built-in service life reserve
Frame Sizes
| Frame | Pump Size | ANSI Group | Suction × Discharge | Max Impeller | Weight |
|---|---|---|---|---|---|
| STi | 1×1.5-4 | AA | 1.5″ × 1″ | 4″ | 84 lb (38 kg) |
| STi | 1×1.5-8 | AA | 1.5″ × 1″ | 8″ | 100 lb (45 kg) |
| MTi | 1×2-10 | A05 | 2″ × 1″ | 10″ | 200–245 lb (91–111 kg) |
| LTi | 1.5×3-13 | A20 | 3″ × 1.5″ | 13″ | 285 lb (129 kg) |
Performance Specifications
| Parameter | Maximum |
|---|---|
| Flow Capacity | 220 GPM (50 m³/h) |
| Head | 925 ft (282 m) |
| Temperature | 700°F (371°C) |
| Pressure | 450 PSIG (31 bar) |
| Speed | 3,600 RPM |
Materials of Construction
| Material Class | Casing | Impeller | Shaft |
|---|---|---|---|
| Ductile Iron / 316SS Trim | Ductile Iron | 316SS | AISI 4140 |
| All 316SS | 316SS (CF-8M) | 316SS | 316SS |
| CD4MCuN | CD4MCuN Duplex | CD4MCuN | AISI 4140 |
| Alloy 20 / Hastelloy | Full wet-end in specified alloy — available on request | ||
Seal Chamber Options
- Standard bore — packing or component mechanical seals
- BigBore™ — larger cross-section for heavy-duty cartridge seals; improved heat dissipation
- TaperBore™ — optimized flow geometry for low-flow, high-head conditions; reduces seal face temperature and vapor formation
- All standard ANSI/API flush plans supported
Shaft & Bearing Data
| Detail | STi | MTi | LTi |
|---|---|---|---|
| Shaft Dia. at Impeller | 0.75″ (19 mm) | 1.0″ (25 mm) | 1.25″ (32 mm) |
| Shaft Dia. at Coupling | 0.875″ (22 mm) | 1.125″ (29 mm) | 1.875″ (48 mm) |
| Shaft Dia. Between Bearings | 1.5″ (38 mm) | 2.125″ (54 mm) | 2.5″ (64 mm) |
| Radial Bearing | SKF 6207 | SKF 6309 | SKF 6311 |
| Thrust Bearing | 3306 | 3309 | 7310 |
| Max Shaft Deflection | 0.002″ (0.05 mm) | ||
Typical Applications
- Chemical Processing: Catalyst injection, chemical dosing, sampling systems, solvent transfer, monomer feed
- Petrochemical & Refining: Wash water injection, amine circulation, reflux, condensate return
- Power Generation: Chemical feed, seal water booster, cooling water chemical treatment
- Pharmaceutical: High-purity solvent transfer, purified water circulation, WFI systems
- General Industry: Pressure boosting, heat transfer fluid circulation, spray systems
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