U | 3-phase / 50Hz

Three phase submersible sewage pumps, constructed in cast-iron with 2-pole motors. Designed for clog free pumping of solid and fibrous materials.

Technical Data

  • Discharge bore mm: 50,80,40
  • Head max. m: 7,4 - 23,5
  • Capacity max. l/min: 264 - 1030
  • Motor output kW: 0,4 - 3,7
  • Phases: 1,3
  • Max. solid handling ø mm: 35 - 56
Performance curve

  Model Colour code curve Discharge bore mm Phases Motor output kW Head max. m Capacity max. l/min Max. solid handling ø mm
free standing with guide rail fitting
autom. 40UA2.25 optional 40 3 0,25 7,4 264 35
50UA2.4 optional 50 3 0,4 11,0 270 35
manual 80U2.75 TOS80U2.75 80 3 0,75 12,2 450 46
80U21.5 - 80 3 1,5 16,5 600 46
80U22.2 - 80 3 2,2 19,0 800 56
80U23.7 TOS80U23.7 80 3 3,7 23,5 1030 56

Model with guide rail fitting optional
Discharge bore mm 40
Phases 3
Motor output kW 0,25
Head max. m 7,4
Capacity max. l/min 264
Max. solid handling ø mm 35

Colour code curve 50
Discharge bore mm 3
Phases 0,4
Motor output kW 11,0
Head max. m 270
Capacity max. l/min 35

Model with guide rail fitting TOS80U2.75
Discharge bore mm 80
Phases 3
Motor output kW 0,75
Head max. m 12,2
Capacity max. l/min 450
Max. solid handling ø mm 46

Colour code curve 80
Discharge bore mm 3
Phases 1,5
Motor output kW 16,5
Head max. m 600
Capacity max. l/min 46

Colour code curve 80
Discharge bore mm 3
Phases 2,2
Motor output kW 19,0
Head max. m 800
Capacity max. l/min 56

Colour code curve 80
Discharge bore mm 3
Phases 3,7
Motor output kW 23,5
Head max. m 1030
Capacity max. l/min 56
ø Discharge bore mm 50mm, 80mm
Discharge Connection Inside thread, JIS10K flange
Optional Accessories Guide rail fitting "TOK" for small pumps, Guide rail fitting "TOS" (guide support, duck foot bend, lifting chain) / Bend and stand set for free standing types
Impeller Vortex impeller
Shaft Seal Double mechanical seal
Bearings Shielded ball bearings
Impeller Grey iron casting EN-GJL-200
Casing Grey iron casting EN-GJL-200
Shaft Seal Silicon carbide in oil bath
Pumping Fluid
Temperature 0-40°C
Type of Fluid Municipal sewage, water with solids
Lubrication Turbine oil (ISO VG32)
Motor Protector (built-in) Circle thermal cut-out
Type, Poles Induction motor, 2 poles, IP68
Insulation Insulation class E, Insulation class F
Phase / Voltage 3-phase / 400V / 50Hz / d.o.l.
Casing Grey iron casting EN-GJL-150
Shaft Stainless steel EN-X6Cr13, Stainless steel EN-X30Cr13
Cable Rubber, NSSHÖU
Dimensions in mm:
W1: lowest running water level
  • 80U2.75
  • 80U21.5
  • 80U22.2
  • 80U23.7
W1: lowest running water level
  • 40UA2.25
  • 50UA2.4
Dimensions - guide rail fitting type in mm:
  • 40UA2.25
  • 50UA2.4
W1: lowest running water level
  • 80U2.75
  • 80U21.5
  • 80U22.2
  • 80U23.7
W1: lowest running water level

The U-series is a 2-pole-motor-based, compact type submersible vortex pump designed for handling raw sewage, wastewater and liquid carrying solid matters and fibrous materials. Rotation of the impeller produces vortex flow in the pump casing, which allows those foreign matters to be pumped out with minimum contact to the impeller. Since this mechanism does not require the foreign matters to pass through the impeller vane, the pump offers practically unchokable pumping.

Case studies


Wastewater on Military Base

The Novo Selo Training Area is a major Bulgarian military training facility established in 1962, presently used by other NATO nations as well. The range has a surface area of 144 km2 (55.6 sq. mi) and is situated 45 km from Bezmer Air Base and 70 km from the port of Burgas in Sliven Province, Bulgaria.

The facility has its designated areas and sectors for tank shooting, and nuclear, biological, and chemical defense and reconnaissance training. The Novo Selo Training Area is highly appreciated by NATO experts and troops and has become the favored site of annual joint US and Bulgarian troops exercises since 2004.

The Novo Selo Training Area is among the joint US-Bulgarian military bases established according to the 2006 Defense Cooperation Agreement between the United States and Bulgaria. The US Army started in late 2008 a 61.15 m USD investment in the development of new housing and other infrastructure for the American troops training at Novo Selo Training Area.

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