Wilo-Economy CO/T-1 Helix V

Series description


Water-supply unit with system separation and a non-self-priming high-pressure multistage centrifugal pump


  • Fully automatic water supply including break tank for indirect connection to the public water supply network
  • Pumping of drinking water and process water, cooling water, fire water (apart from fire-extinguishing systems in accordance with DIN 14462 and with the approval of the local fire safety authorities) or other types of industrial water that do not attack the materials either chemically or mechanically and do not contain abrasive or long-fibre constituents.

Type key

Example:Wilo-CO/T-1 Helix V 403/CE
COCompact pressure boosting system
TWith integrated break tank for system separation
1With one pump
Helix VPump series
4Rated volume flow of the single pump [m3/h]
03Number of single pump stages
CEControl device; CE = Controller Economy

Special features/product advantages

  • Compact system, ready for connection, for all applications that require system separation
  • Heavy-duty system due to stainless steel high-pressure multistage centrifugal pumps of the Helix V series
  • Easily adjustable and operationally reliable due to the CE control device used

Technical data

  • Mains connection 3~230/400 V ±10 %, 50 Hz (other versions on request)
  • Max. fluid temperature 40 °C
  • Max. ambient temperature of 40 °C
  • Operating pressure 16 bar
  • Inlet pressure 6 bar
  • Switching pressure stages 6/10/16 bar
  • Nominal connection diameters on discharge side Rp 1 ¼"
  • Nominal connection diameters on inlet side Rp 1 ¼"
  • Rated speed 2900 rpm
  • Protection class IP41
  • Switching capacity P2 max. at max. 10 A = 4 kW (for > 4 kW downstream electromechanical power section)
  • Fuse protection on mains side AC 3 according to motor power and EVU regulations
  • Approved fluids (other fluids on request):
    • Pure water without settling sediments
    • Process water, cold water, cooling water and rainwater
    • Drinking water
    • Fire water
    Note on fluids: Approved fluids are generally waters which do not attack the materials used, neither chemically nor mechanically, and do not contain any abrasive or long-fibre constituents.


  • 1 Helix V series pump
  • Maximum stage number: 14
  • PE break tank, atmospherically ventilated (150 l)
  • Components that come in contact with fluid are corrosion-resistant
  • Shut-off device, on the pressure side
  • Non-return valve, on suction side
  • Break tank including float valve and float switch (low-water signal transmitter)
  • Diaphragm pressure vessel 8 l, PN 16, on the pressure side
  • Low-water cut-out switchgear


  • Connection-ready water-supply unit, mounted on a PE baseplate, complete pipework, including all necessary valves and shut-off valves (except for inlet-side shut-off device), pressure sensor kit, glanded version (Helix V series) stainless steel high-pressure multistage centrifugal pump and CE control device, mounted, wired and ready for connection; trip electronics in low-water cut-out switchgear fitted in the control device
  • Diaphragm pressure vessel: 8 l/PN 16 located on the discharge side with a butyl rubber diaphragm, completely safe in accordance with food safety laws; for testing and inspection purposes, with a shut-off device, with drain and flow device according to DIN 4807
  • Control device: the system is standard-equipped with a CE Economy Controller


  • Impellers and stage chambers 1.4301/1.4404 stainless steel
  • Pump housing made of 1.4301/1.4404 stainless steel
  • Shaft 1.4301/1.4404 stainless steel
  • Gasket EPDM (EP 851) / FKM (Viton)
  • Housing cover made of 1.4301/1.4404 stainless steel
  • Housing bottom 1.4301/1.4404 stainless steel
  • Mechanical seal of B-carbon/tungsten carbide, SiC/carbon
  • Pressure shroud made of 1.4301/1.4404 stainless steel
  • Bearing of tungsten carbide
  • Pump base EN-GJL-250
  • Pipework made of 1.4307 stainless steel

Scope of delivery

  • factory-mounted, ready for connection pressure boosting system checked for functionality and impermeability
  • Packaging
  • Installation and operating instructions


Other mains connections on request


Special versions e.g. for deionised water, suction mode, etc. on request.

Consulting guide

Inlet pressure

The maximum inlet pressure (see Technical data) is to be observed for the system configuration. The maximum inlet pressure is calculated from the maximum system operating pressure minus the maximum pump delivery head at Q = 0.

Only for fire protection systems

Version in accordance with DIN 1988 (EN 806), part 5+6

This does not apply to fire-extinguishing systems in accordance with DIN 14462. Please request these separately.

Always observe the specifications in DIN 1988 (EN 806) when using and operating the pressure boosting system.

Duty chart

Pump curves


General overview

Edition 2017
Page format A4
Number of pages 72

PDF (46 MB)



PDF: Wilo-Economy CO/T-1 Helix V


Page selection

Format selection

Optional information

You can enter any personal information that you want to be displayed in the header.