Centrifugal pump Wilo-EMU

waterelectricsubmersible

Product type

• Submersible pump

Key features

• VdS certified
• Heavy-duty version made of grey cast iron or bronze
• Pressure shroud in corrosion-free and hygienic stainless steel design with rubber bearings for reducing noise and vibration

Design
Multistage submersible pump with a sectional construction with VdS approval for vertical or horizontal installation to supply a sprinkler system.

Application
For supplying fire water to sprinkler systems in accordance with the VdS guideline ‘VdS CEA 4001’ from, for example:

• underground fire water tanks
• fire water wells
• fire water tanks
• …

Liquid
For pumping fire water and process water:

• Without long-fibre and abrasive constituents
• Maximum sand content of 150 g/m³ (depending on type)

Equipment / function

• Multistage hydraulics with semi-axial impellers
• NEMA coupling for motor sizes up to 8"
• Wilo standard coupling for motor sizes 10" and above
• Three-phase current motor for star-delta starts
• Rewindable motors

Type key (examples and designation explanation)
Example assemblies:
Wilo-EMU KM 1300S-2a + NU 801-2/60
Wilo-Actun ZETOS-F8.130-4a + NU 801-2/60

Type key breakdown (illustrative rows from the range):
Hydraulics: KM 1300S-2a
KM1300 = Hydraulics type
S = Trimmed impeller
2 = Number of hydraulic stages
a = Defined impeller diameter

Hydraulics: Actun ZETOS-F8.130-4a
Actun = Product family
ZETOS = Series made from stainless steel investment castings
F = Submersible pump for fire-fighting applications
8 = Diameter of the hydraulics in inches
130 = Volume flow in m³/h in the best efficiency point at 50 Hz
4 = Number of hydraulic stages
a = Defined impeller diameter

Motor: NU 801-2/60
NU = Submersible motor (NU…, U…) 801 = Size (6... = 6"; 8... = 8"; 9... = 10"; 12... = 12"; 15.../16... = 16") 2 = Number of poles 60 = Motor-dependent definition (e.g. stator length in cm for specific motors)

Technical data

• Mains connection: 3~400 V / 50 Hz
• Submerged operating mode: S1
• Max. fluid temperature: 25 °C
• Max. sand content:
  
  • EMU KM 750 / KM 1300 / D 500: 35 g/m³
  • ZETOS-F8 / -F10: 150 g/m³
• Max. number of starts:
  
  • NU 611 ... = 20/h
  • NU 801 ..., NU 911 ..., NU 121 ... = 10/h
  • NU 160 …, U 156 … = 5/h
• Max. immersion depth: 300 m
• IP rating: IP68

Construction
KM 750 / KM 1300 / D 500 hydraulics
Multistage submersible-motor pump with semi-axial hydraulics. Housing components and impellers made of bronze or grey cast iron with a 2K coating. Stage housing with neck rings manufactured from special bronze. Discharge port is a flange connection. Built-in non-return valve available as an option.

ZETOS-F hydraulics
Multistage submersible-motor pump with semi-axial hydraulics. Housing parts and impellers made from stainless steel investment castings. Discharge port has integrated non-return valve and is available as flange or threaded connection. Built-in non-return valve can be excluded optionally.

Motor
Three-phase current motor with rewindable PE2 winding for star-delta starts. Motor shroud made of stainless steel or steel/bronze. Motor shaft sealed using a mechanical seal made of solid silicon carbide. High axial thrusts absorbed by thrust bearing with rockers and counter-thrust bearing. All bearings self-lubricating. Motors typically filled with a mixture of water and antifreeze; some motors can be filled with drinking water (U 156 … filled with drinking water as standard).

Motor cooling
Motor cooled by the pumped fluid. Waste heat transferred directly to circulating fluid via motor shroud. Motor is operated in submerged state. For optimised inlet flow fit an anti-vortex plate. To increase flow velocity at the motor fit a cooling shroud.

Scope of delivery

• Hydraulics + motor completely assembled
• Connection cables in accordance with standards; cable cross-section and length as specified by the customer
• Installation and operating instructions

Options

• Pressure shroud assembly for dry installation – used to install the unit into the pipeline system; by default a non-return valve is not fitted in the pressure shroud; maximum inlet pressure 10 bar (for D 500 unit: max. 5 bar)

Accessories

• Bearing brackets for horizontal installation
• Anti-vortex plate for optimising the inlet flow
• Cooling shroud to increase the flow velocity at the motor
• Non-return valve (certified, depending on type)

Caractéristiques / spécifications techniques

• Mains connection: 3~400 V / 50 Hz
• Operating mode: submerged S1
• Maximum fluid temperature: 25 °C
• Maximum sand content: 35–150 g/m³ depending on hydraulics type
• Maximum immersion depth: 300 m
• Maximum number of starts varies by motor type (5/h to 20/h)
• Protection class: IP68
• VdS approval for sprinkler system supply according to VdS CEA 4001