Grundfos SL1.80.80.22.4.50B Pump
Spare Parts for SL1.80.80.22.4.50B Wastewater Pump
Product Summary
The Grundfos SL1.80.80.22.4.50B is a robust 2.2 kW (4-pole) submersible wastewater pump designed for the transfer of domestic and industrial sewage. It features the innovative S-tube® impeller, which provides free passage for solids up to 80mm, ensuring reliable operation without clogging. This pump is engineered for submerged installation on auto-coupling systems or free-standing on a ring stand.
- S-tube® Impeller: Offers great hydraulic efficiency and large free passage (80mm) to handle solids and fibers effectively.
- Cartridge Shaft Seal: A double mechanical cartridge shaft seal simplifies replacement and ensures a reliable barrier between the pumped liquid and the motor.
- Watertight Cable Entry: The cable entry is filled with polyurethane potting compound to prevent liquid ingress into the motor, even if the cable is damaged.
- Clamp Connection: A stainless steel clamp secures the pump housing to the motor unit, allowing for easy and tool-free disassembly for inspection.
- Moisture Protection: Integrated moisture switches monitor the motor and oil chamber (optional depending on config) to alert against leakage.
Spare Parts List
| Select | Qty | Part Number | Description | Material / Spec |
|---|---|---|---|---|
| 1 | 96102360 | Shaft Seal Cartridge (Primary/Secondary) | SiC/SiC - Carbon/Ceramic | |
| 1 | 96102361 | O-Ring Service Kit (All Seals) | NBR | |
| 1 | 98679093 | Cable Plug (Motor Side) | Polyurethane/Rubber | |
| 1 | 96813735 | Lifting Bracket & Hardware | Stainless Steel | |
| 1 | 96076121 | Oil (1 Litre) | Paraffinic Oil | |
| 1 | Pos. 49 | S-tube Impeller (80mm Free Passage) | Cast Iron (EN-GJL-250) | |
| 1 | Pos. 50 | Pump Housing (DN 80) | Cast Iron (EN-GJL-250) | |
| 1 | Pos. 92 | Clamp (Motor/Pump Connection) | Stainless Steel | |
| 1 | Pos. 105 | Shaft Seal (Cartridge) | Composite/Metal | |
| 1 | Pos. 181 | Cable Plug (Outer) | Polyurethane |
Exploded Parts Views
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model / Curve | SL1.80.80.22.4.50B |
| Rated Power | 2.2 kW (3.0 HP) |
| Voltage / Frequency | 3 x 400-415 V / 50 Hz |
| Rated Current | See Motor Nameplate |
| Discharge Connection | DN 80 (Flange) |
| Impeller Type | S-tube® (80mm Free Passage) |
| Installation Type | Submersible (Auto-Coupling) |
Troubleshooting, Common Faults & Solutions
Pump does not start / Motor trips
Likely Cause: Power supply failure, jammed impeller, or cable fault.
Action / Part: Check fuses/cable and inspect Impeller (Pos. 49) for clogging.
Pump runs but flow is low
Likely Cause: Wrong direction of rotation or clogged piping.
Action / Part: Swap two phases (3-phase) or clean discharge line.
Moisture switch alarm
Likely Cause: Water ingress into motor or oil chamber.
Action / Part: Replace Shaft Seal (Kit 96102360) and O-rings (Kit 96102361).
Vibration or noise
Likely Cause: Worn bearings or debris in impeller.
Action / Part: Clean pump or replace Bearings (requires service).
Pump runs constantly
Likely Cause: Stop level switch failed or pump capacity too low.
Action / Part: Check level switches/float or inspect for impeller wear.
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