Wilo-Actun ZETOS

Multi-stage stainless-steel investment-casting submersible pump in sectional construction for vertical and horizontal installation.

• Boreholes and cisterns
• Sprinkling and irrigation
• Ground-water lowering
• Pressure boosting
• Off-shore installations
• Fire-extinguishing systems
• Geothermal energy and thermal applications
• Underground mining

For pumping in the following commercial areas:

• Drinking water (ACS approval, motor-dependant)
• Industrial water with max. sand content up to 150 g/m³
• Sea water

• With or without integrated non-return valve
• NEMA coupling up to nominal motor size of 8"
• Wilo standard connection starting at nominal motor size of 10"

Hydraulics

• Max. volume flow: 765 m³/h
• Max. delivery head: 640 m
• Max. fluid temperature: 70 °C
• Max. sand content: 100 g/m³ (K12), 150 g/m³ (K8, K10)
• Discharge port
  • K8: G 5, DN 100/PN 10/16, DN 125/PN 10/16, DN 150/PN 10/16
  • K10: G 6, DN 150/PN 10/16, DN 150/PN 40
  • K12: 8-8 NPT, DN 200/PN 10/16, DN 200/PN 25, DN 200/PN 40

Motor

• Mains connection: 3~400 V, 50 Hz ±10 %; 3~460 V, 60 Hz ±10 %
• Max. fluid temperature: 60 °C, depending on motor type and flow velocity at the motor
• Submerged operating mode: S1
• Max. number of starts:
  • NU 5 ..., NU 6 ..., NU 7 ... = 20/h
  • NU 8 ..., NU 9 ..., NU 122 ... = 10/h
  • NU 160 = 5/h
• Max. immersion depth:
  • NU 5 ..., NU 711 = 350 m
  • NU 6 ..., NU 701, NU 8 ..., NU 9 ..., NU 12 ..., NU 16 ... = 300 m
• Protection class: IP68
• Control range for frequency converter:
  • Asynchronous motors: NU 501, NU 701 = 30 ... 50 Hz
  • Asynchronous motors: NU 611, NU 801, NU 811, NU 911, NU 122, NU 160 = 25 ... 50 Hz
  • Permanent magnet motors: NU 512, NU 612, NU 711, NU 812 = 60 ... 100 Hz
  • After consultation with the manufacturer, motors can also be operated at higher frequencies!

Hydraulics

Multi-stage submersible pump with semi-axial hydraulics. Housing parts and impellers made of stainless steel investment casting (1.4408). Discharge port with threaded or flange connection available with or without integrated non-return valve. Motor connection as standard NEMA connection (up to 8") or standard Wilo connection (from 10").

Motor

Asynchronous and synchronous motors can be selected as the drive:

• Asynchronous three-phase AC motors for direct and star-delta starting:
  • NU 501, NU 701: Hermetically sealed motor with enamel-insulated winding, resin-impregnated
  • NU 611, NU 811, NU 911, NU 122, NU 160: Rewindable motor with insulated PE2 or PVC winding
  • Operation on the frequency converter is permitted!
• Synchronous three-phase permanent magnet motor for direct starting:
  • NU 512: Hermetically sealed motor with enamel-insulated winding, resin-impregnated
  • NU 612, NU 711, NU 812: Rewindable motor with insulated PE2 winding
  • A frequency converter is absolutely necessary!

Motor shroud made of steel, stainless steel or bronze casting. Hydraulic connection as standard NEMA connection (up to 8") or standard Wilo connection (from 10"). The motor shaft is sealed with a mechanical seal made of solid silicon carbide material. The motor bearings are self-lubricating. The thrust bearing is equipped with rockers to absorb the high axial thrust. The counter-thrust bearing absorbs the negative axial thrust.

Motors in the NU 5 … and NU 7 … series are filled with a water-glycol mixture. All other motors are filled with a water-glycerine mixture.

Cooling

• The motor is cooled by the pumped fluid. The motor must always be immersed.
• The limit values for maximum fluid temperature and minimum flow velocity must be adhered to.
• Vertical installation is possible with or without cooling shroud.
• In horizontal installation, the unit is supported by bearing blocks. An anti-vortex plate or cooling shroud may be used to improve the inlet flow.

• Unit (hydraulics system + motor) pre-assembled at the factory
• Connection cable per customer request
• Installation and operating instructions

• Special voltages
• Higher fluid temperatures
• Flange adapter to accommodate different connection sizes
• Drinking water as motor filling (T version)
• Version with pressure shroud for the direct installation of the unit in the pipeline system. Standard models are without mounted non-return valves. The maximum inlet pressure is 10 bar.

• Cooling shrouds
• Pressure shroud
• Bearing brackets and anti-vortex plate
• Transitions
• Switchgears
• Frequency converter
• Output filter
• Plastic cable connector set

• With or without integrated non-return valve
• NEMA coupling up to nominal motor size of 8"
• Wilo standard connection starting at nominal motor size of 10"

Hydraulics

• Max. volume flow: 765 m³/h
• Max. delivery head: 640 m
• Max. fluid temperature: 70 °C
• Max. sand content: 100 g/m³ (K12), 150 g/m³ (K8, K10)
• Discharge port
  • K8: G 5, DN 100/PN 10/16, DN 125/PN 10/16, DN 150/PN 10/16
  • K10: G 6, DN 150/PN 10/16, DN 150/PN 40
  • K12: 8-8 NPT, DN 200/PN 10/16, DN 200/PN 25, DN 200/PN 40

Motor

• Mains connection: 3~400 V, 50 Hz ±10 %; 3~460 V, 60 Hz ±10 %
• Max. fluid temperature: 60 °C, depending on motor type and flow velocity at the motor
• Submerged operating mode: S1
• Max. number of starts:
  • NU 5 ..., NU 6 ..., NU 7 ... = 20/h
  • NU 8 ..., NU 9 ..., NU 122 ... = 10/h
  • NU 160 = 5/h
• Max. immersion depth:
  • NU 5 ..., NU 711 = 350 m
  • NU 6 ..., NU 701, NU 8 ..., NU 9 ..., NU 12 ..., NU 16 ... = 300 m
• Protection class: IP68
• Control range for frequency converter:
  • Asynchronous motors: NU 501, NU 701 = 30 ... 50 Hz
  • Asynchronous motors: NU 611, NU 801, NU 811, NU 911, NU 122, NU 160 = 25 ... 50 Hz
  • Permanent magnet motors: NU 512, NU 612, NU 711, NU 812 = 60 ... 100 Hz
  • After consultation with the manufacturer, motors can also be operated at higher frequencies!

Hydraulics

Multi-stage submersible pump with semi-axial hydraulics. Housing parts and impellers made of stainless steel investment casting (1.4408). Discharge port with threaded or flange connection available with or without integrated non-return valve. Motor connection as standard NEMA connection (up to 8") or standard Wilo connection (from 10").

Motor

Asynchronous and synchronous motors can be selected as the drive:

• Asynchronous three-phase AC motors for direct and star-delta starting:
  • NU 501, NU 701: Hermetically sealed motor with enamel-insulated winding, resin-impregnated
  • NU 611, NU 811, NU 911, NU 122, NU 160: Rewindable motor with insulated PE2 or PVC winding
  • Operation on the frequency converter is permitted!
• Synchronous three-phase permanent magnet motor for direct starting:
  • NU 512: Hermetically sealed motor with enamel-insulated winding, resin-impregnated
  • NU 612, NU 711, NU 812: Rewindable motor with insulated PE2 winding
  • A frequency converter is absolutely necessary!

Motor shroud made of steel, stainless steel or bronze casting. Hydraulic connection as standard NEMA connection (up to 8") or standard Wilo connection (from 10"). The motor shaft is sealed with a mechanical seal made of solid silicon carbide material. The motor bearings are self-lubricating. The thrust bearing is equipped with rockers to absorb the high axial thrust. The counter-thrust bearing absorbs the negative axial thrust.

Motors in the NU 5 … and NU 7 … series are filled with a water-glycol mixture. All other motors are filled with a water-glycerine mixture.

Cooling

• The motor is cooled by the pumped fluid. The motor must always be immersed.
• The limit values for maximum fluid temperature and minimum flow velocity must be adhered to.
• Vertical installation is possible with or without cooling shroud.
• In horizontal installation, the unit is supported by bearing blocks. An anti-vortex plate or cooling shroud may be used to improve the inlet flow.

• Unit (hydraulics system + motor) pre-assembled at the factory
• Connection cable per customer request
• Installation and operating instructions

• Special voltages
• Higher fluid temperatures
• Flange adapter to accommodate different connection sizes
• Drinking water as motor filling (T version)
• Version with pressure shroud for the direct installation of the unit in the pipeline system. Standard models are without mounted non-return valves. The maximum inlet pressure is 10 bar.

• Cooling shrouds
• Pressure shroud
• Bearing brackets and anti-vortex plate
• Transitions
• Switchgears
• Frequency converter
• Output filter
• Plastic cable connector set