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: K8.70
Type of impeller:
Number of stages: 1 – 22
Max. impeller diameter: 143 mm
Min. impeller diameter 113 mm
Max. pumped water temperature: 30 °C
(higher temperature on request)
With/without non-return valve: with non-return valve
Unit diameter: 8″ (Ø192 – Ø216)
(exact diameter on request)
Selected number of stages: 1
MOTOR
Encapsulated “NEMA Standard” submersible motor in glandless pump technology.
Three-phase current version with non-rewindable stator.
Motor stator, shaft and connection elements made of stainless steel.
Motor end parts in solid cast-iron design.
Radial bearing through water-lubricated and water-cooled plain bearing made of special artificial carbon.
Mitchell-type tilting pad axial bearing for high loads.
MOTOR DATA
Selected motor: NU 501-2/9-10,7
Rated power: 10.7 kW
Power consumption of the motor at rated power: 13.0 kW
Current consumption of the motor at rated power: 40.77 A
Number of poles: 2
Rated speed: 3,425 1/min
Cos phi at rated power: 0.84
Efficiency of the motor at rated power: 82 %
Rated frequency: 60 Hz
Starting current for direct starting: 250.0 A
Starting current for star-delta starting: 83.3 A
Starting torque: 60.4 Nm
Moment of inertia: 0.0047 kg m²
Maximum switching frequency per hour: 20
Switching break: 2 minutes
Permissible axial thrust downward: 15,500 N
Permissible axial thrust upward: 1,400 N
Possible installation type: Horizontal and vertical
Maximum pumped water temperature 30 °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: 143.0 mm
MATERIALS
Suction piece: 1.4408
Stage- /guide casing: 1.4408
Impeller: 1.4408
Stationary wear ring: EPDM
Pump shaft: 1.4462
clamp sleeve: 1.4462
Bearing sleeve: EPDM
Connecting screws: A4
Nuts: A4
Non-return valve: 1.4408 / AISI 316
:
Weight of the unit: 74.9 kg
