Actun ZETOS
Submersible pump
Efficient raw water intake for all fields of applications
- Energy-saving water supply with a pump efficiency of up to 86%
- Cost-efficient operation, thanks to the highest overall efficiency in this class with permanent magnet motor
- High reliability as a result of the particularly corrosion-resistant hydraulics made completely of 1.4408 (AISI 316) stainless steel investment casting
- High wear resistance: Max. sand content of up to 150 g/m³
- ACS approval for use with drinking water
- Straightforward maintenance, easy installation and dismantling
Recommended services
Varying operating conditions
Changing water requirements and a fluctuating ground water level pose a major challenge for submersible pumps that operate optimally only at one duty point. With the Wilo-EFC the speed of the Wilo-Actun ZETOS-K10 can be continuously controlled. This allows flexible adaptation to all duty points and thus offers a solution for maximum energy efficiency and huge cost savings.
Universal operating sites
The Wilo-Actun ZETOS-K8 is suitable for universal use – in the agricultural, municipal water supply and industrial sectors. In addition, it is also suitable for dry well installation. Thanks to hard-wearing finely cast stainless steel, the Wilo-Actun ZETOS-K8 is also suitable for demanding applications.
The maximum permissible sand content in the water is 150 g/m³.
Your universal water supply solutions
Which field of application is relevant to your needs?
Best in class. Robust. Universal.
1 - Field of application: Water supply and pressure boosting
Challenge: Flexible systems are needed to meet the fluctuating water consumption requirements of different types of buildings – such as schools, hospitals, stadiums and hotels.
Solution: The Wilo-Actun ZETOS ensures a reliable water supply – even for high volumes. Wilo offers flexible systems for every installation location. The product is built into a pressure shroud for pressure boosting applications. This makes it overflow-proof, space-saving and quiet, as well as providing a reliable and convenient water supply.
2 - Field of application: Raw water intake
Challenge: With ever-increasing energy costs and an urgent need to reduce CO2 emissions, the municipal water management sector faces the challenge of providing a more energy-efficient drinking water supply.
Solution: Using Wilo-Actun ZETOS high-efficiency pumps and motors unlocks significant financial and energy savings potential.
3 - Field of application: Clean water treatment
Challenge: Different water qualities need to be taken into account during the preparation of raw water. Some of these place high demands on the material characteristics of borehole pumps.
Solution: Thanks to the high quality of materials used in all components, the Wilo-Actun ZETOS is able to pump acidic and alkaline water or water with a high salt content. This again demonstrates the universal applicability of our borehole pump.
4 - Field of application: Professional irrigation/agriculture
Challenge: In many areas with a low groundwater level, water needs to be pumped from deep below ground to meet the requirements of professional agriculture.
Solution: Borehole pumps ensure that the required supply is met. The Wilo-Actun ZETOS is a robust pump with a long service life – even in locations with a high sand content. On top of that, it can overcome delivery heads of up to 640 metres.
5 - Field of application: Industry/offshore
Challenge: from lightly contaminated water to aggressive fluids: The demands on pumps in the industrial sector could hardly be more extreme. Drilling rigs need to pump corrosive salt water; the high sand content of water in the industrial dewatering of mines poses a significant challenge to pumps.
Solution: Made of 1.4408 corrosion-resistant stainless steel, the Wilo-Actun ZETOS is more than a match for the challenges of the offshore sector, such as those posed on a drilling rig. And thanks to its EPDM neck rings, it is also highly suitable for pumping water with a sand content of up to 150 g/m3 – as may be encountered in mine dewatering, for example.
Key Facts
Simply unique: Incredibly high pump efficiency of up to 85.5 percent.
High wear resistance: max. sand content of 150 g/m3.
The investment-cast 1.4408 AISI 316 stainless steel material makes the pump especially corrosion-resistant – allowing it to be used anywhere.
“Best in class”
New standards in submersible pumps.
Advantages of the hydraulics
The Wilo-Actun ZETOS stands out thanks to its multistage hydraulics with semi-axial impellers. The housing parts and impellers are made of investment-cast stainless steel. An optimised impeller design with a cast balancing weight ensures smooth operation. The pressure connection can optionally be equipped with an integrated non-return valve.
Background
After 30 years in operation, the efficiency of the high-pressure multistage centrifugal pump in sectional construction originally installed in the waterworks was steadily decreasing. The old machinery was replaced with two Wilo-Actun ZETOS-K8.50-15 and two Wilo-Sub TWI 6.30 pumps. The pressure shroud pumps now ensure the safe and efficient transport of potable water to the elevated tanks – with a delivery head of up to 335 metres.
Implementation
The compact design of the pump enables a highly space-saving, simple, and therefore cost-effective installation. The submersible pumps are encased in a pressure shroud, allowing the units to be integrated into the existing system using a horizontal dry well installation. Additionally, the Wilo pressure shroud pumps are also overflow-proof.
Result
With an overall efficiency of up to 76 percent, the good hydraulics and built-in permanent magnet motors with speed regulation and control system make energy savings of up to 100,000 kilowatt hours per year possible. The low-maintenance operation also leads to additional cost savings for the operator.
Count on maximum economy
Life cycle cost calculation:
Highly effective. Highly economical.
Choose the Wilo-Actun ZETOS for a variable system solution that sets energy efficiency standards for submersible pumps. That means benefiting from impressively low energy costs alongside an effective water supply with a consistently optimised duty point configuration. The calculation of costs over the pump’s life cycle demonstrates its impressive economy.
| Pump |
Wilo-EMU NK 86-4 NU 611-2/34 |
Wilo-Actun ZETOS-K 8.70-4 NU611-2/26 |
Wilo-Actun ZETOS-K 8.70-4 NU511-4/30 |
|---|---|---|---|
| Motor | Asynchronous | Asynchronous | Permanent magnet motor |
| Running time h per day/year | 24/10 | 24/10 | 24/10 |
| Calculation of energy cost savings | |||
| Motor efficiency % | 81.5 | 81.3 | 92.5 |
| Pump efficiency % | 71.5 | 83.8 | 83.8 |
| Total efficiency % | 58.3 | 68.1 | 75.6 |
| Annual energy costs in € | 37,118 | 31,876 | 28,762 |
| Annual energy savings in € | 5242 | 8357 |
Wilo-EFC
- Quick and efficient commissioning thanks to the user-friendly operation assistant.
- High energy efficiency and compact design as a result of up to 98 percent efficiency.
- An economical solution thanks to minimal cooling requirements.
- Comprehensive coverage of pump applications provided by adjustable control modes.
- Flexible connectivity provided by optional connections to various bus systems.
Wilo-EMU 12…24“
- Hydraulics adapted to the duty point enable energy-efficient operation.
- Individually configurable motors and materials for reliable operation in all types of application.
- Drinking water versions with ACS approval.
- Motors with sheath flow cooling (CoolAct technology) for greater power density.
- Rewindable motors with easy maintenance.
- Pressure shroud for application as a pressure-boosting system.
Wilo-Sub TWI
- Long service life thanks to corrosion-resistant stainless steel, optionally in V4A quality.
- Individually configurable motors and materials for reliable operation in all types of application.
- Drinking water versions with ACS approval.
- A high degree of flexibility thanks to 4, 6, 8 and 10-inch versions.
- Volume flow performance from 1 to 250 m3/h.
FAQ
Are the pumps produced entirely by Wilo?
Yes, the pumps are produced at our site in Hof, Germany, and are 100 % tested.
Is the 1.4408 stainless steel version suitable for sea water?
Wilo has decades of experience in the offshore sector. Our experiences using the pump in sea water have been positive. A version made of 1.4517 (duplex stainless steel) is also available.
Is the Ceram coating approved for drinking water?
The Ceram CT coating conforms to German Federal Environment Agency (UBA) standards and is approved by the French water regulations advisory scheme (ACS).
What frequency converter is required to drive the permanent magnet motors?
The Wilo-EFC offers numerous options and we recommend it for use in all applications. However, any frequency converter may be used.
Does the power dissipation of the frequency converter cancel out the efficiency benefits of the permanent magnet motor?
The Wilo-EFC’s power dissipation is about two percent. In addition to that, there may be losses caused by the output filter. However, these losses do not come close to neutralising the efficiency benefits of the permanent magnet motor – which are up to 13 percent. That’s on top of excellent performance in the partial load range.
Flexible, convenient, efficient and powerful – this is our pump consultant. With just one click all data relevant for tender is available.
Wilo-Actun Zetos in Wilo-Select 4 Online
We have answers to your questions
Our products and services have aroused your interest? Then we are happy to help!
Whether it's creating an offer or editing service specifications, designing different types of equipment, advising on the selection of pumps and switchgear, or just helping with hydraulic and control issues.
Feel free to contact your nearest sales office and make an appointment. We look forward to you!
Find the right contact for your question.
Design
Multi-stage stainless-steel investment-casting submersible pump in sectional construction for vertical and horizontal installation.Application
- Boreholes and cisterns
- Sprinkling and irrigation
- Ground-water lowering
- Pressure boosting
- Off-shore installations
- Fire-extinguishing systems
- Geothermal energy and thermal applications
- Underground mining
Liquid
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
Equipment/function
- 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"
Type key
Example: | Wilo-Actun ZETOS-K8.130-17 + NU 711-2/130 |
Hydraulics | Actun ZETOS-K8.130-17 |
Actun | Product family |
ZETOS | Series made of stainless steel investment casting |
K | Pump type |
8 | Diameter of the hydraulics in inches |
130 | Volume flow in m³/h at the best efficiency point at 50 Hz |
17 | Number of hydraulic stages |
Motor | NU 711-2/130 |
NU | Submersible motor |
711 | Size:
|
2 | Number of poles |
130 | Motor-dependant definition:
|
Technical data
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
- IP rating: 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!
Construction
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.
Scope of delivery
- Unit (hydraulics system + motor) pre-assembled at the factory
- Connection cable per customer request
- Installation and operating instructions
Options
- 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.
Accessories
- Cooling shrouds
- Pressure shroud
- Bearing brackets and anti-vortex plate
- Transitions
- Switchgears
- Frequency converter
- Output filter
- Plastic cable connector set