Grundfos SEV.100.100.30.4.50B Pump
Spare Parts for SEV.100.100.30.4.50B Wastewater Pump
Product Summary
The Grundfos SEV.100.100.30.4.50B is a 3.0 kW heavy-duty submersible wastewater pump featuring a SuperVortex impeller for handling solids up to 100 mm. Designed for municipal and industrial applications, this 4-pole unit offers reliable clog-free operation. It allows for flexible installation, including submerged auto-coupling or dry installation (vertical/horizontal) without separate motor cooling.
- SuperVortex Impeller: Features a vortex impeller design (Pos. 49) creating a strong flow ensuring the passage of long fibres and solids up to 100 mm.
- Dry & Wet Installation: The motor is enclosed and watertight, allowing the pump to be installed dry (vertical/horizontal) or submerged.
- Cartridge Shaft Seal: The primary seal (Pos. 105) is a cartridge unit, facilitating quick replacement and ensuring a reliable barrier between liquid and motor.
- Clamp Connection: A stainless steel clamp (Pos. 92) connects the pump housing and motor, enabling tool-free disassembly and 360° rotation.
- Watertight Cable Plug: The cable entry (Pos. 1) uses a polyurethane-embedded plug to prevent moisture ingress into the motor windings.
Spare Parts List
| Select | Qty | Part Number | Description | Material / Spec |
|---|---|---|---|---|
| 1 | 96102361 | Shaft Seal Kit (Cartridge) | NBR / SiC-SiC | |
| 1 | 96102369 | O-Ring Service Kit | NBR | |
| 1 | 96690704 | Bearing Kit (Upper & Lower) | Steel | |
| 1 | 96592063 | Clamp Connection Kit | Stainless Steel | |
| 1 | 96689958 | Cable 10m (4G 2.5 + 3x1mm2) | Lyniflex | |
| 1 | 96690434 | Lifting Bracket | Stainless Steel 1.4301 | |
| 1 | 96586753 | Oil (1 Litre) | Paraffinic Oil | |
| 1 | Pos. 49 | Impeller (SuperVortex) | Cast Iron | |
| 1 | Pos. 50 | Pump Housing | Cast Iron | |
| 1 | Pos. 1 | Cable Plug Assembly | Polyurethane | |
| 2 | Pos. 193 | Oil Screw | Steel |
Exploded Parts Views
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model / Curve | SEV.100.100.30.4.50B |
| Rated Power | 3.0 kW (4.0 hp) |
| Voltage / Frequency | 3 x 400-415 V / 50 Hz |
| Rated Current | See Motor Nameplate |
| Discharge Connection | DN 100 (Flange) |
| Impeller Type | SuperVortex (100 mm Free Passage) |
| Installation Type | Submerged (S) or Dry (D) |
Troubleshooting, Common Faults & Solutions
Pump does not start / Fuses blow
Likely Cause: Power supply failure, motor windings shorted, or impeller blocked.
Action / Part: Check cable/motor and clean Impeller (Pos. 49).
Motor trips shortly after start
Likely Cause: Low setting of thermal relay, voltage drop, or wrong rotation.
Action / Part: Adjust relay to nameplate, check voltage, swap phases.
Below-standard performance
Likely Cause: Impeller blocked by impurities or wrong direction of rotation.
Action / Part: Clean Impeller (Pos. 49) or correct phase connection.
High power consumption (SEV)
Likely Cause: Impeller blocked by impurities or wrong direction of rotation.
Action / Part: Clean Impeller (Pos. 49) or swap two phases.
Pump runs but gives no liquid
Likely Cause: Outlet valve closed/blocked or air lock in pump.
Action / Part: Check valves and vent the pump.
Online Resources
Request for Quotation
Thank you!
Your Request for Quote has been successfully sent.
Our team is reviewing your requirements and will be in touch shortly.
Selected Parts:
- No parts selected