Economy MHIE 402N (3~380/400/440 V, FKM) | Wilo

Economy MHIE 402N (3~380/400/440 V, FKM)

Technical data
Tender text

Multistage, non-self-priming, horizontal high-pressure centrifugal pump in block design with horizontal suction port and vertical pressure port and built-in, air-cooled frequency converter. The integrated frequency converter enables variable speed, pressure and PID control.

Speed control

  • "Speed control" : Manually with green button or via external signals
  • "Differential pressure, constant" : Pressure control with pressure sensor, setpoint adjustment via green button or via external signals
  • "PID control": other constant control variables (temperature, volume flow, pressure....) with sensor, setpoint adjustment with green button, by means of external signals

The electronic module provides various protective functions. They include overload protection, the detection of low water, mains undervoltage or overvoltage, high ambient temperature, missing phases, blocked pumps and short-circuits. Error messages are issued on the display.

Short-circuit-proof +24 V voltage output with max. contact strength of 30 mA is present on the electronic module. The module has potential-free contacts for SSM, red and green LED for ON/OFF signal.


  • In1: Input sensor signal 4-20 mA, 0-10 V, 0-20 mA or 2-10 V
  • In2: Input setpoint 0-20 mA, 0-10 V, 4-20 mA or 2-10 V


  • + 24 V voltage output with max. contact strength of 50 mA
  • Potential-free collective fault and run signals
  • External On/Off mode. IR communication
  • Plug-in position for Wilo IF-Modules Modbus, BACnet, CAN, PLR, LON for connection to the building automation

This pump has a compact design with a continuous motor pump shaft and a bidirectional mechanical seal.

The pump is suitable for water supply and pressure boosting, industrial recirculation systems, process water and cooling water circuits. It can also be used in fire extinguishing systems, washing systems as well as for irrigation.

Special features/product advantages

  • Space-saving, compact block design
  • All hydraulic parts which come into contact with the fluid, such as stage chambers, impellers, guide vane apparatuses and pump housings, are made of stainless steel.
  • Green-button technology and display enable particularly simple parameterisation and operation of the electronic module.
  • Drinking water approval (ACS, KTW, WRAS) for all components in contact with the fluid (EPDM version)

Scope of delivery

  • Wilo-Multivert MHIE high-pressure multistage centrifugal pump
  • Installation and operating instructions

Design notes

  • Optional plug-in IF-Modules
  • Sensors are available as accessories.
Operating data
Fluid media
Product data
Min. fluid temperature Tmin
-15 °C
Max. fluid temperature Tmax
90 °C
Max. ambient temperature Tmax
50 °C
Maximum operating pressure PN
10 bar
Maximum inlet pressure p inl
6 bar
Motor data
Mains connection
3~400 V, 50/60 Hz
Voltage tolerance
400/50:+/-10%, 380/60:+/-10%, 440/60:+/-6%
Rated power P2
0,75 kW
Rated current IN
3,2 A
Rated speed n
3500 1/min
Motor efficiency ηM 50%
74 Percentage
Motor efficiency ηM 75%
78 Percentage
Motor efficiency ηM 100%
79 Percentage
Insulation class
Protection class
Pump housing
Stainless steel
Stainless steel
Stainless steel
Shaft seal
Gasket material
Installation dimensions
Pipe connection on the suction side DNs
Rp 1¼
Pipe connection on the pressure side DNd
Rp 1
Information for order placements
Product description
Economy MHIE 402N (3~380/400/440 V, FKM)
Net weight, approx. m
16 kg
Article number

Certificate REACH (Documents)

REACH regulation

Edition 2020-08
Page format 209.9 x 297.0 mm
Number of pages 2
PDF (158 KB)


DWG (1 MB)


STP (1 MB)


Number of pages
DWG (19 KB)


DWG (19 KB)


DWG (19 KB)