Wilo Wilo-EMU FA
Wilo-EMU FA cast-iron submersible pumps for raw sewage with faecal matter, pre-treated wastewater and process water, in wet-well or dry-well installation.
Wilo-EMU FA is a close-coupled submersible wastewater pump in heavy-duty cast-iron construction, for stationary or portable installation in a wet well and for stationary installation in a dry well. It pumps raw sewage with faecal matter and long fibres, pre-treated wastewater, process water and effluent, with a dry solids content of up to 8 %, depending on the hydraulics and the impeller type. The T motors, surface-cooled, run continuously submerged, while the FK, FKT and HC motors, with an active cooling system, run continuously non-submerged, so also in a dry well. The wear rings of the impeller and the casing are made of hardened material.
The code has two parts, the hydraulics and the motor, for example FA 20.54E + FK 17.1-6/16KEx: 20 multiplied by 10 gives the nominal discharge diameter (DN 200), 54 is the performance index, and E the impeller type (W vortex, E single-channel, Z, D and V with two, three or four channels). For the motor, FK is the type, 17.1 the size, 6 the number of poles, 16 multiplied by 10 the length of the stack in mm, K the sealing, and Ex the explosion-proof version. For a quotation, send us both parts of the code from the nameplate. When the item is available locally or at the supplier, delivery takes 24–72 h; made to order, it usually takes 1–4 weeks.
Models and codes
| Code | Note |
|---|---|
| FA 20.54E + FK 17.1-6/16KEx | Type code example: DN 200 discharge, single-channel impeller, FK motor with active cooling, 6 poles, explosion-proof version. |
| FA 15.95E + FKT 27.1-6/22K | DN 150 discharge, single-channel impeller, FKT motor with 6 poles. |
| FA 15.44W + FKT 27.1-4/28K | DN 150 discharge, vortex impeller, FKT motor with 4 poles. |
Key specifications
| Power supply | 3~400 V, 50 Hz |
|---|---|
| Operating mode | S1 submerged; S1 or S2 non-submerged |
| Protection and insulation class | IP68, class H |
| Liquid temperature | +3…+40 °C; higher on request |
| Free passage | 45–130 mm |
| Maximum immersion depth | 20 m |
| Materials | casing and impeller of EN-GJL or EN-GJS; SiC/SiC mechanical seal on the liquid side; stainless steel shaft 1.4021 |
| Sealing | H: mechanical seal and lip seal; G: two independent mechanical seals; K: cartridge unit with two mechanical seals |
Wilo lists Wilo-EMU FA as a submersible pump configured to the application, with no discontinuation notice.
Frequently asked questions
What does FA 15.44W mean in the pump code?
15 multiplied by 10 gives the nominal discharge diameter, DN 150, 44 is the performance index of the hydraulics, and W shows the vortex impeller. The second part of the code, after the + sign, describes the motor.
Can the EMU FA pump run non-submerged?
The FK, FKT and HC motors, with active cooling, can run continuously non-submerged. The T motors run non-submerged only if the nameplate indicates an operating mode for this situation, and the hydraulic casing must always stay under water.
What does the EMU FA pump monitor?
Depending on the motor: the winding temperature, the moisture in the sealing chamber and in the motor or terminal compartment, and the temperature of the motor bearings.
Other Wilo series
We quote the EMU FA pump on the complete code of the hydraulics and the motor; the design of the pumping station, installation and commissioning are outside our quotation.
Updated: 2026-11-12