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Wilo-Comfort-N-Vario COR MVISE.../VR

Series description

Special features/product advantages

  • System is virtually noise-free due to 2-4 parallel-switched, glandless stainless steel high-pressure multistage centrifugal pumps with integrated, water-cooled frequency converter
  • Up to 20 dB[A] quieter than conventional systems with comparable hydraulic output
  • Control range of frequency converters from 20 to 50 Hz
  • Operationally reliable through MVISE pumps with integrated dry-running detection and automatic deactivation

Design type

Pressure boosting system with 2 to 4 parallel-switched, non-self-priming stainless steel high-pressure multistage centrifugal pumps with speed-controlled glandless pump motors


  • Fully automatic water supply and pressure boosting in residential, commercial and public buildings, hotels, hospitals, department stores and for industrial systems.
  • 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.


  • 2-4 pumps with glandless pump motors per system
  • Infinitely variable control mode through the use of pumps with integrated frequency converters
  • Components that come in contact with fluid are corrosion-resistant
  • Galvanized base frame with height-adjustable vibration damper for insulation against structure-borne noise
  • Pipework made of 1.4571 stainless steel
  • Check valve at each pump, on the suction and pressure sides
  • Non-return valve, pressure side
  • Diaphragm pressure vessel 8 l, PN16, pressure side
  • Pressure sensor, on the discharge side
  • Optional pressure gauge (suction side)
  • Pressure gauge (discharge side)
  • Optional low-water cut-out switchgear

Scope of delivery

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

Type key


Wilo-COR-3 MVISE 406/VR


Compact pressure boosting system with integrated speed control


Number of pumps


Pump series


Rated volume flow of the single pump [m3/h]


Number of single-pump stages


Control unit; VR = Vario controller

Technical data

  • Mains connection 3~ 400 V ± 10 %, 50 Hz; 3~380/440 V ±10 %, 60 Hz (other versions on request)
  • Max. fluid temperature 50 °C
  • Max. ambient temperature 40 °C
  • Operating pressure 16 bar
  • Inlet pressure 6 bar
  • Nominal connection diameters on discharge side R 2" - R 3"
  • Nominal connection diameters on inlet side R 2" - R 3"
  • Speed range 1100 - 2750 rpm
  • Protection class IP 44
  • Fuse protection on mains side [AC 3] according to motor power and EVU regulations
  • Approved fluids (other fluids on request):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.
    • Cooling water
    • Potable and process water
    • Fire water


  • Impellers 1.4301 stainless steel
  • Stage chambers 1.4301 stainless steel
  • Pump housing 1.4301 stainless steel
  • Shaft 1.4122 stainless steel
  • Seals EPDM (EP851)
  • Housing cover made of 1.4301 stainless steel
  • Lower housing section stainless steel 1.4301
  • Pressure shroud 1.4301 stainless steel
  • Bearing made of carbon, synthetic resin-impregnated
  • Pump base EN-GJL-250
  • Pipework made of 1.4571 stainless steel


  • Base frame: galvanised and provided with height-adjustable vibration absorbers for comprehensive insulation against structure-borne noise; other versions on request
  • Pipework: complete pipework made of stainless steel, suitable for the connection of all piping materials used in building services; the pipework is dimensioned according to the overall hydraulic performance of the pressure boosting system
  • Pumps: 2 to 4 pumps from the MVISE 2.., 4.., 8.. series switched in parallel are used; adapted frequency converters on the pump motor enable continuous auto control for all pumps of these series; all pump components in contact with fluid are made of stainless steel
  • Valves: each pump is fitted on the suction and pressure side with a check valve with DVGW approval mark or annular shut-off valves and a pressure-side DVGW-approved non-return valve
  • 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 shut-off ball cock, with drain and throughflow fitting according to DIN 4807
  • Pressure sensor: 4 to 20 mA, located on the discharge side for activating the central Comfort-Vario controller
  • Pressure display: suction- and discharge-side pressure gauge (ø 63 mm); additional digital display of discharge pressure in the alphanumeric LCD display of the Comfort-Vario controller
  • Controller: the system is standard-equipped with a VR Vario controller


General overview 2018 International version

Article Number 2200591
Edition 2018
Version number 1
Page format 209.9 x 297.0 mm
Number of pages 72

PDF (11 MB)



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General Overview 2018

PDF: Wilo-Comfort-N-Vario COR MVISE.../VR


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