Wilo TWI 04.01-09-B Single Phase 4” Stainless steel Submersible Borehole Pump

Brand Wilo
Model Wilo-TWI 04.01-09-B
Availability In Stock
General information

Wilo TWI 04.01-09-B


  • Submersible multistagepump for clean water application.


  • Hydraulics.

Multistage submersible motor pump with 4” NEMA connection andradial or semi axial impellers with sectional construction.Integratednon returnvalve.All parts that come in contact with water are made from corrosion free materials.

  • Motor.

Corrosion free single or three phase AC motor for direct starting.Sealed and hermeticallycast motor, resin impregnated, with enamel insulated windings. Self lubricating bearings with water – glycol filling.

  • Cooling.

The motor is cooled by fluid.The motor must always be operated in a submerged state. The limit values of maximum fluid temperature and the minimum flowrate must not be exceeded.Vertical installation is possible with the use of a cooling jacket.

Special features

  • 4” Submersible multistage pump in tie-strap version for vertical or horizontal installation
  • Easy installation through integrated non-return valve
  • Pump & Motor supplied in separate cartons for assembly on site by others- 1.5m connecting cable supplied
  • 1~ 240V versions supplied with switch-box with capacitor, on/off switch and thermal motor protection.
  • 2-wire single phase models feature inbuilt capacitor
  • 3-wire single phase has external capacitor mounted in control box

Type Key

  • TWI Submersible pump.
  • 04 Diameter of hydraulic unit in inches (“).
  • 01 Nominal flow rate m3/hr
  • 09 Number of hydraulic stages.
  • B Series generation


  • For water and potable water supply from boreholes andrainwater storage.
  • Process water supply.
  • For municipal water supply, sprinkling and irrigation.
  • Pressure boosting.
  • Lowering water level.
  • For pumping water in industrial applications.
  • For pumping water without longfibre and abrasiveconstituents.


  • Hydraulic housing: 1.4301 stainless steel.
  • Impellers: 1.4301 stainless steel.
  • Hydraulic shaft: 1.4057 stainless steel.
  • Motor housing: 1.4301 stainless steel.
  • Motor shaft: 1.4305 stainless steel.

Technical Data

  • MainsConnection: 1~230V, 50Hz
  • MainsConnection:3~400, 50 Hz.
  • Immersedoperating mode:S1
  • Fluid temperature:3-30 C
  • Minimum motor flowrate: 0.15 m/s
  • Maximum sand content: 50g/m3
  • Maximumnumber of starts: 20 per hour
  • Maximum immersion depth: 350 meters
  • Protection class: IP-68 .
  • Insulation class: F

Performance Curve

WAU Cooltech Website Curves TWI4

Wilo TWI 04.01 Performance curve

Specification Sheet:

WILO TWI Brochure



  • 1 x Wilo TWI 04.01 Submersible Bore Water Pump
  • 1 x Service Manual


  • Gross Weight: 10.2kg
Spec & Features
  • Features and technical specification of the product. Please contact us for further information and specifics.
  • Power
  • Mains connection
    1~230 V, 50 Hz or 3~400 V, 50 Hz
  • Fluid temperature
    3 – 30 °C
  • Minimum flow rate at motor
    0.1 m/s
  • Max. sand content
    50 g/m3
  • Max. number of starts
  • Max. immersion depth
    150 m
  • Protection class
  • Pressure connection
    Rp 1¼ – Rp 2
  • Weight
  • Warranty
    3 Years
Ask a question