Well & waterworks version, in corrosion-resistant material design “C”
For use in cold, clean, chemically corrosive water applications with a max. sand content of 150 mg/l and max. particle size of 2 mm.
To this end, it is imperative to get the manufacturer to check the material durability by means of water analysis.
HYDRAULICS
Single or multistage semi-axial submersible pump in waterworks version for vertical/horizontal installation in staged construction.
All housing components in high-quality precision-cast stainless steel version with replaceable neck rings made of wear-resistant materials.
Shaft and connection elements are made of high-alloy stainless steel.
Impellers in solid-metal design.
Duty point adjustment possible by impeller optimisation.
Shaft guidance by rubber plain bearings.
Radial bearings completely fluid lubricated and maintenance-free.
Submersible pump: Offshore K10.310
Type of impeller: Semi axial impeller
Number of stages: 1 – 15
Max. impeller diameter: 186 mm
Min. impeller diameter 150 mm
Max. pumped water temperature: 20 °C
(higher temperature on request)
With/without non-return valve: with non-return valve
Unit diameter: 10″ (Ø245 – Ø275)
(exact diameter on request)
Selected number of stages: 12
MOTOR
“NEMA Standard” submersible motor in glandless pump technology.
In three-phase current version with rewindable stator.
Motor stator, shaft ends and connectors made of stainless steel.
Motor end parts in solid cast-iron design.
Radial bearing through water-lubricated and -cooled plain bearing made of special artificial carbon, with incorporated spiral or longitudinal grooves.
Single-disc axial bearing or alternatively Mitchell-type tilting pad axial bearing for high loads.
Support plates and tilting pads made of stainless steel, impeller wear ring made of artificial carbon.
With integrated rotating seal ring for negative axial thrust.
Motor filling with pure potable water or water/propylene glycol
Optionally available with winding temperature monitoring by PTC thermistor or PT 100 sensor.
MOTOR DATA
Selected motor: NU 122-2/135-o-265
Rated power: 265 kW
Power consumption of the motor at rated power: 298.4 kW
Current consumption of the motor at rated power: 202.7 A
Number of poles: 2
Rated speed: 2,903 1/min
Cos phi at rated power: 0.85
Efficiency of the motor at rated power: 88.8 %
Rated frequency: 50 Hz
Starting current for direct starting: 1,460.0 A
Starting current for star-delta starting: 486.7 A
Starting torque: 1,180.0 Nm
Moment of inertia: 0.3557 kg m²
Maximum switching frequency per hour: 10
Switching break: 5 minutes
Permissible axial thrust downward: 70,000 N
Permissible axial thrust upward: 10,000 N
Motor filling volume: 30 l
Possible installation type: V
Maximum pumped water temperature 40 °C
(higher temperature on request)
DUTY POINT DATA
Volume flow:
Delivery head:
Pump efficiency at duty point: %
Power consumption of the motor at duty point (P1):
NPSH value of the pump at duty point:
Impeller diameter: 186.0 mm
MATERIALS
Suction piece: 1.4517
Stage- /guide casing: 1.4517
Impeller: 1.4517
Stationary wear ring: EPDM
Pump shaft: 1.4462
clamp sleeve: 1.4462
Bearing sleeve: EPDM
Connecting screws: A4
Nuts: A4
Non-return valve: 1.4517
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