Submersible Drainage
| Identification | |
| Manufacturer | Grundfos |
| Series | SE |
| Model / size | SE 50.65 |
| Pump type | Submersible Drainage |
| Spec code | PS-SM-014 |
| Duty & power | |
| Min flow | 5 m³/hr |
| Max flow | 30 m³/hr |
| Min head | 5 m |
| Max head | 30 m |
| Max power | 3 kW |
| NPSHr | 1.1 m |
| Efficiency at BEP | 55 % |
| Drive & electrical | |
| Starting method | DOL (Direct On Line) — up to 3kW |
| VFD compatible | Yes (10-60 Hz, soft start recommended) |
| Motor IE class | IE3 (mandatory EU/MEPS) / IE4 optional |
| Insulation class | Class F (155°C) standard |
| IP rating | IP68 |
| Materials & sealing | |
| Casing | Cast Iron |
| Impeller | Hard Iron |
| Shaft | SS 420 |
| Seal type | Mechanical Seal |
| API seal plan | Plan 11 / Plan 13 (vent) — canned motor, no external seal |
| Application | |
| Service | Drainage, Dewatering |
| Key features | Drainage pump, NOT potable water |
A complete, shareable page for a single pump. It plots the performance curve (head, efficiency and NPSHr against flow, with the best-efficiency point marked, or dosing flow against stroke), decodes the API 682 / ISO 21049 mechanical seal plan, and lists the full specification — duty and operating range, drive and motor, materials of construction, build and reliability, connections, weight and certifications. Pop-up panels give the type-specific preventive-maintenance schedule (daily to annual tasks with procedures) and a troubleshooting guide (symptoms, probable causes and recommended solutions).
Run a centrifugal pump near its BEP and keep dosing pumps in their recommended stroke band. Data is from the engineering reference database — confirm against the manufacturer's certified curve before procurement.
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