Hydro-Unit Cube

Summary

Product identification

The Hydro-Unit CUBE is a two-pump booster unit available in Cube FR (Multi Frequency, variable speed) and Cube DOL (Direct On Line, fixed speed) series. It consists of two DPVME vertical multi-stage centrifugal pumps where all metal parts in contact with the medium are made of AISI304 stainless steel, complete with built-in non-return valves.

Key abbreviations:

• HU: Hydro-Unit
• CC: Cube Control
• MF (FR): Cube Control Multi Frequency (each pump frequency controlled)
• DOL: Direct On Line
• AISI: Stainless steel
• G: Thread

The unit includes four AISI304 ball valves, AISI304 manifolds without dead-spot pipe, a run-dry protection kit with a pressure transmitter, and a discharge pressure control kit also with a pressure transmitter. An 8-litre flow-through membrane tank is integrated. The entire installation is enclosed, with the Cube control system housed inside.

Operating limits

• Ambient temperature: 0 - 30 °C
• Liquid temperature: +4 - 40 °C
• Maximum working pressure: 1.000 kPa
• Maximum level: 1000 m above sea level
• Minimum frequency (VFD): 10 Hz (to ensure sufficient cooling)

Feed water

• Supply pressure:
  • Minimum: 120 kPa (non-cavitating)
  • Maximum: Supply pressure plus pump pressure combined must not exceed 1000 kPa.

Electrical

• Power supply: 3 x 400 V + N
• Voltage tolerance: 10%
• Insulation class (unit): IP21
• Maximum fuse: 16 A
• Maximum current (unit):
  • Cube FR: 13 A
  • Cube DOL: 10 A
• Motor IP rating: 55
• Standard motor data (3 phase, 2p, 50 Hz):
  • Rated power output: 0.37 kW to 2.2 kW
  • Rated voltage: 230/400 V
  • Rated amperage: Varies from 1.6/0.95 A to 8.2/4.7 A
  • Rated speed: Varies from 2865 rpm to 2900 rpm
  • Motor efficiency: Varies from 76% to 83.5%
  • Sound pressure: 56-60 dB(A)
  • Max. starts per hour: 30-50
  • See the official PDF for exact tabulated values for each motor power.

Mechanical / hydraulic

• Basic materials:
  • Hydraulic part: 1.4301 (AISI304)
  • Casting parts: 1.4308 (AISICF8)
  • Sealing pump: EPDM
  • Non return valve: POM, Rubber
  • Valve: 1.4301 (AISI304)
  • Manifolds: 1.4301 (AISI304)
  • Membrane tank connection part: AISI
  • Membrane tank rubber: Butyl-rubber
  • Pressure transmitter: 1.4305 (AISI303)
  • Housing: PP 30 V1
  • Miscellaneous: May contain brass parts
• Membrane tank: 8 litres, flow-through type.
• Run-dry protection: Via a pressure transmitter.
• Fittings: AISI304 G 5/4
• Manifold connections: G 5/4 or G 6/4, depending on the pump series.
• Mass: 85 kg (for HU CUBE 2 DPVME FR and DOL models specified).
• Dimensions: Detailed dimensions and drawings are available in the official PDF for HU CUBE 2 DPVME FR (60 Hz - 3500 rpm) and HU CUBE 2 DPVME DOL (50 Hz - 2900 rpm) models.
• Performance characteristics: Hydraulic performance curves for DPVME 2, DPVME 4, and DPVME 6 pumps at both 50 Hz (~2850 rpm) and 60 Hz (~3450 rpm) (1 pump in operation) are provided in the official PDF.

Control system

The Cube control microprocessor module provides the following basic functions:

• Pressure control
• Pump staging
• Continuously optimised minimum-run time of the pumps
• Adjustable correction factor for pressure loss in the system
• 24-hours test-run function
• Adjustable delay of the underpressure/run-dry protection

Display options include current system values, pump status, operating hours, and a comprehensive failure interface.

Additional features

• Water leakage detection: An internal detector triggers an alarm if water is present inside the Cube, active in both horizontal and vertical positions.
• Control types:
  • MC MF: Frequency converter for each pump (60 Hz pump frequency).
  • MC DOL: Motor starter relay for each pump (Direct On Line).
• Cabling: 2.5 m cable with a junction box complete with load switch.
• Protection: Thermal motor protection switch for each pump.
• Failure outputs: Fail-safe potential-free failure outputs (urgent and non-urgent, NO and NC) connectable externally via an included plug.
• Vibration isolation: Unit delivered with 4 vibration isolators.

Accessories

• Mounting sets: Various mounting kits are available for wall mounting, capillary connections (35 mm, 42 mm, 54 mm), clamping connections (35 mm, 42 mm, 54 mm), and threaded BI connections (G 5/4, G 6/4, G 2).
• Pressure reducing valves: A range of pressure reducing valves are available with different connections (G 1/2 to G 2, 22 mm to 54 mm CAP), bores (DN15 to DN50), pressure classes (PN15, PN16, PN25), and pressure ranges (0.5-2 bar, 1.5-6 bar, 1.5-12 bar). Specific materials are listed as MS (brass). See the official PDF for exact tabulated values and diagrams.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

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