Design
Submersible pump, multistage
Application
For water and potable water supply from boreholes and rainwater storage
Process water supply
For municipal water supply, sprinkling and irrigation
Pressure boosting
Lowering the water level
For pumping water in industrial applications
For pumping water without long-fibre and abrasive constituents
Special features/product advantages
Easy maintenance due to rapid installation and dismantling
Integrated non-return valve
Vertical and horizontal (stage-dependent) installation possible
Standard and configurable versions available
Star/delta starting
Cast and rewindable motors
Technical data
Mains connection: 3~400 V, 50 Hz
Submerged operating mode: S1
Fluid temperature:
Hermetically cast motors: 3-20 °C or 3-30 °C (depending on type)
Rewindable motors (SD-R): 3-30 °C (depending on type)
Minimum motor flow: 0.1-0.5 m/s (depending on type)
Max. sand content: 50 g/m3
Max. number of starts: 10‐20/h (depending on type)
Max. immersion depth: 100 – 350 m (depending on type)
Protection class: IP 68
Pressure port: Rp 5
Materials
Standard version:
Hydraulic housing: Stainless steel 1.4301
Impellers: Stainless steel 1.4301
Hydraulics shaft: Stainless steel 1.4057
Motor housing: EN‐GJL or stainless steel 1.4301
Motor shaft: Stainless steel 1.4021, 1.4301 or 1.4305
Special version:
Hydraulic housing: Stainless steel 1.4401
Impellers: Stainless steel 1.4571
Hydraulics shaft: Stainless steel 1.4401
Motor housing: G-CuSn10, stainless steel 1.4401, 1.4571 (depending on type)
Motor shaft: Stainless steel 1.4542, 1.4462 (depending on type)
Description/design
Submersible-motor pump for vertical or horizontal installation.
Hydraulics
Multistage submersible-motor pump with 6″ or 8″ NEMA connection and semi-axial impellers with sectional construction. Integrated non-return valve. All parts in contact with the fluid are made of corrosion-free materials.
Motor
Three-phase motor for direct or star-delta starting Sealed, hermetically cast motor, resin-impregnated, with enamel-insulated winding or rewindable motor with PVC-insulated winding, self-lubricating bearing, with water-glycol filling. NU 611, NU 8…-series motors can also be filled with potable water (T version).
Cooling
The motor is cooled by the fluid. The motor must always be operated in submerged state. The limit values for the max. fluid temperature and the minimum flow rate must not be exceeded. Vertical installation is possible optionally with or without cooling jacket. Cooling jacket is required for horizontal installation.
Pressure shroud
The pressure shroud is used for direct installation of the unit in the pipe system. Standard models are without mounted non-return valves. The maximum inlet pressure is 10 bar.
