Wilo-COR-1 MHI...EM/DM-T...

Series description

Your advantages

  • Compact system with outstanding price/performance ratio due to MHIE series stainless steel high-pressure multistage centrifugal pumps with integrated air-cooled frequency converters
  • Superproportionally large control range
  • Integrated full motor protection with thermistor sensor (PTC)
  • Automatic deactivation in the event of low water via the motor control electronics
  • Maximum degree of control using the simple navigation and adjustment using rotary knob
  • Tank with interconnecting pipework on a common base frame


Pressure boosting system with non-self-priming stainless steel high-pressure multistage centrifugal pumps with speed-controlled motors


Fully automatic water supply and pressure boosting in inlet mode from a 260 litre integrated breaktank with AB airgap, for domestic, commercial, industrial and municipal applications (e.g. residential, office, administration buildings, hotels, hospitals, trades, industry, water supply companies). Standby pump included in accordance with DIN 1988 and DIN EN 806.

Approved fluids are generally waters which do not attack the materials used, neither chemically nor mechanically, and do not contain any abrasive or long-fiber constituents like:

  • Drinking water (check drinking water approvals in materials section)
  • Cooling water
  • Process water
  • Firefighting water (apart from fire-extinguishing systems in accordance with DIN 14462 and with the approval of the local fire safety authorities)


  • 260L WRAS approved GRP breaktank
  • 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
  • Shut-off valve at 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
  • Pressure gauge, discharge side
  • Low water cut out switch

Scope of delivery

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

Type key


Wilo-COR 1MHI406-EM-T260


Compact pressure-boosting system with integrated speed control


Number of pumps


Pump series


Rated volume flow [m3/h] of single pump


Number of single pump stages


1~230V AC


3~400V AC


Tank capacity

Technical data

  • 3~400V and 1~230 V ± 10 %, 50 Hz; mains connection (other versions on request)
  • Max. fluid temperature 50 °C (70 °C optional)
  • Ambient temperature max. 40 °C
  • Operating pressure 10 bar
  • Inlet pressure 6 bar
  • Nominal connection diameters on discharge side R 1”
  • Nominal connection diameters on inlet side R 3/4"
  • Speed range 2900 rpm
  • Protection class IP 54
  • Fuse protection on mains side A, AC 3 according to motor power and EVU regulations
  • Approved fluids (other fluids on request):Note on fluids: Approved fluids are generally water mixtures which do not chemically or mechanically attack the materials used and do not contain either abrasive or fibrous matter
    • Cooling water
    • Potable and process water
    • Fire water (wet line; for dry lines on request - comply with separate specifications of DIN 1988 (EN 806) and of fire-protection authorities.)


  • Impellers 1.4301/1.4404 stainless steel
  • Stage chambers 1.4301/1.4404 stainless steel
  • Pump housing made of 1.4301/1.4404 stainless steel
  • Shaft 1.4404 stainless steel
  • Gaskets EPDM (EP851)/FKM (Viton)
  • Housing cover made of 1.4301/1.4404 stainless steel
  • Housing bottom 1.4404 stainless steel
  • Mechanical seal made of tungsten carbide/carbon
  • Pressure shroud 1.4301/1.4404 stainless steel
  • Bearing, tungsten carbide
  • Pump base aluminium


  • Base frame: galvanised and provided with height-adjustable vibration absorbers for comprehensive insulation against structure-borne noise; other versions on request
  • Tank: 260 litre GRP breaktank with AB airgap and WRAS approval
  • Pipework: complete pipework made of brass and 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: 1 pump from the MHIE 2.., 4.., 8.. series; 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 shut-off valve with WRAS approval mark or annular shut-off valves and a pressure-side WRAS 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 ball valve, 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)


REACH regulation

Edition 2020-08
Page format 209.9 x 296.7 mm
Number of pages 4

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