Wilo-EMU 8"

Series description

Design

Multistage 8” submersible pump in sectional construction for vertical and horizontal installation

Application

  • For drinking water supply / general water supply from boreholes and rainwater storage tanks
  • Process water supply
  • Municipal water supply
  • Sprinkling and irrigation
  • Pressure boosting
  • Pumping water in industrial applications and water control
  • Utilisation of geothermal energy
  • Utilisation in offshore areas

Type key

Example:Wilo-EMU NK 80.2-17 + NU 801-2/40
Hydraulics:NK 80.2-17
NKHydraulics
8Diameter of the hydraulic unit in inches ["]
0Size
2Impeller made of special material
17Number of hydraulic stages
  
Motor:NU 801-2/40
NUSubmersible motor
801Overall size (4… = 4"; 5…, 6... = 6"; 7…, 8… = 8")
2Number of poles
40Package length

Special features/product advantages

  • Heavy-duty version made of cast iron or zinc-free bronze
  • Pressure shroud in corrosion-free and hygienic stainless steel version with rubber bearings for reducing noise and vibration
  • Impellers made of zinc-free bronze
  • Drinking water version with ACS approval
  • Optional Ceram CT coating for increasing efficiency

Technical data

  • Mains connection: 3~400 V, 50 Hz
  • Immersed operating mode: S1
  • Max. fluid temperature (higher temperatures on request):
    • NU 4... / NU 5... / NU 6… / NU 7… / NU 811 = 30 °C
    • NU 801 = 20 °C
  • Minimum motor flow:
    • NU 4… / NU 801 = 0.1 m/s
    • NU 5... / NU 7... = 0.16 m/s
    • NU 611 = 0.1 - 0.5 m/s
    • NU 811 = 0.5 m/s
  • Max. sand content: 35 g/m3
  • Max. number of starts: 10‐20/h (depending on type)
  • Max. immersion depth:
    • NU 4…, NU 5… NU 7… = 350 m
    • NU 611, NU 811 = 100 m
    • NU 801 = 300 m
  • Protection class: IP 68
  • Control range for frequency converter:
    • NU 4... / NU 5... / NU 7… / NU 611 / NU 811 = 30-50 Hz
    • NU 801 = 25-50 Hz

Equipment/function

  • Multistage submersible-motor pump with radial or semi-axial impellers
  • Hydraulics and motor freely configurable according to power requirements
  • Integrated non-return valve (depending on type)
  • NEMA coupling
  • Three-phase motor for direct or star-delta starting
  • Hermetically cast motors
  • Rewindable motors

Description/design

Submersible-motor pump for vertical or horizontal installation.

Hydraulics

Multistage submersible-motor pump with radial or semi-axial hydraulics. Housing parts made of EN‐GJL or EN‐GJS with 2K coating or G‑CuSn10, impellers made of Noryl (NK 80…, 81…, 82…) or G‑CuSn10. Pressure port as threaded connection (types NK 80…, 81…, 82…) or flange connection (types KD…), integrated non-return valve. Pressure port as flange or threaded connection, without non-return valve (types K…, NK 86…, 87…).

Motor

Three-phase motor for direct and star-delta starting Sealed, hermetically cast motor with enamel-insulated winding, resin-impregnated (NU 4…, NU 5…, NU 7…) or rewindable motor with PVC‐insulated winding (NU 611…, NU 8…). Motor shroud made of stainless steel, A2/A4 quality.

Pump connection as standard NEMA connection. Sealing of motor shaft achieved through the use of a rotary shaft seal (NU 4...) or mechanical seal made of solid silicon carbide material. Self-lubricating motor bearing. Thrust bearing with rockers for absorption of high axial thrust. Negative axial thrust is absorbed by the counter-thrust bearing.

Motors in the NU 4..., NU 5… and NU 7… series are filled with a water‐glycol mixture, motors in the NU 611 and NU 811 series are filled with a water-glycerine mixture. NU 611 and NU 8…series motors can also be filled with drinking water (T version). Frequency converter operation is permitted (SF 1.1).

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. For horizontal installation, bearing brackets must be used for reinforcement of the unit. An anti-vortex plate or cooling jacket may be used to improve the inlet flow.

Pressure shroud

The pressure shroud is used for direct installation of the unit in the pipe network. Standard models are without mounted non-return valves. The maximum inlet pressure is 10 bar.

Configuration

  • No suction mode is possible with these units!
  • The unit must be fully immersed in water during operation.

Scope of delivery

  • Hydraulics + motor fully assembled
  • Connecting cable approved for drinking water, cable cross-section and length per standard design or per customer request
  • Installation and operating instructions

Options

  • Special materials
  • Drinking water version with ACS approval
  • 60 Hz version
  • PT100 sensor for thermal motor monitoring

Duty chart

Duty chart

Duty chart

Produkti

Design

NEMA connection

Standardised connection

-

Integrated non-return valve

Without non-return valve

AC motor

-

Three-phase motor

Direct activation

Star-delta activation

FC operation

Motor with cast stator

Rewindable motor

Oil motor filling

-

Water-glycol motor filling

Drinking water motor filling

º

Hydraulics/motor preassembled

Application

Horizontal installation

Vertical installation

Equipment/function

Motor temperature monitoring, PT100

º

PTC motor temperature monitoring

º

Capacitor box for 1~230 V

-

Dry-running protection

º

Integrated lightning protection

-

Accessories

Bearing brackets for horizontal installation

º

Cooling jacket

º

Non-return valve

º

Pressure shroud

º

Materials

Pump housing

On customer request

Pump housing (special version)

On customer request

Impeller

On customer request

Impeller (special version)

On customer request

Motor housing

On customer request

Motor housing (special version)

On customer request

Downloads

Certification Booklet Wilo-EMU D/DCH/K/KD/KM/NK/SCH / Wilo-Sub TWI/TWU / Wilo-Zetos K8 (w/o motor)

Article Number 6080455
Edition 1702
Version number 02
Page format A4
Number of pages 71

PDF (1 MB)

Shkarko

Certification Booklet Wilo-EMU NU/U-Motor

Article Number 6080454
Edition 1702
Version number 01
Page format A4
Number of pages 8

PDF (427 kB)

Shkarko

Certification Booklet Wilo-EMU / Wilo-Zetos + NU / U-Motor

Article Number 6074549
Edition 1702
Version number 04
Page format A4
Number of pages 53

PDF (935 kB)

Shkarko

Clean Water

Page format A4
Number of pages 24

PDF (8 MB)

Shkarko

General overview

Edition 2017
Page format A4
Number of pages 72

PDF (46 MB)

Shkarko

Wilo-EMU pressure shroud pump with pre-filled motor

Version number 3.0
Page format A4
Number of pages 63

PDF (897 kB)

Shkarko

Wilo-EMU pressure shroud pump without pre-filled motor

Version number 3.0
Page format A4
Number of pages 63

PDF (967 kB)

Shkarko

Wilo-EMU borehole pump with pre-filled motor

Version number 3.0
Page format A4
Number of pages 77

PDF (1 MB)

Shkarko

Wilo-EMU borehole pump without pre-filled motor

Version number 3.0
Page format A4
Number of pages 67

PDF (998 kB)

Shkarko

PDF: Wilo-EMU 8"

Konfiguro

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