Wilo-TWI 04 Single Phase & Three Phase
4″ Stainless Steel Submersible Borehole Pump.
Long service life thanks to corrosion-resistant stainless steel, optionally available in V4A quality
ACS certified for drinking water applications
A high degree of flexibility thanks to versions in the 4, 6, 8 and 10-inch area
High range of performance from 1 to 250 m³/h
Multistage 4″ submersible pump in tie strap version for vertical or horizontal installation
For water and drinking water supply from boreholes and rainwater storage
Process water supply
For municipal water supply, sprinkling and irrigation
Lowering of the water level
For pumping water in industrial applications
For pumping water without long-fibre and abrasive constituents
Multistage submersible-motor pump with radial or semi-axial impellers
Integrated non-return valve
Single-phase or three-phase AC motor
Hermetically sealed motors
Scope of delivery
Hydraulics + motor completely assembled
1.5/2.5 m connection cable drinking water approval (cross-section: 4 x 1.5 mm2)
Single-phase version including switchbox with capacitor, thermal motor protection and On/Off switch
Installation and operating instructions
Mains connection: 1~230 V, 50 Hz or 3~400 V, 50 Hz
Submerged operating mode: S1
Fluid temperature: 3 – 30 °C
Minimum flow rate at motor: 0.1 m/s
Max. sand content: 50 g/m3
Max. number of starts: 20/h
Max. immersion depth: 150 m
Protection class: IP68
Pressure connection: Rp 1¼ – Rp 2
Hydraulics housing: Stainless steel 1.4301
Impellers: Stainless steel 1.4301
Hydraulic shaft: Stainless steel 1.4057
Motor housing: Stainless steel 1.4301
Motor shaft: Stainless steel 1.4305
Submersible pump with ACS approval for vertical or horizontal installation.
Multistage submersible-motor pump with 4″ NEMA connection and radial or semi-axial impellers with sectional construction. Integrated non-return valve. All parts that come in contact with the fluid are made of corrosion-free materials.
Corrosion-free single-phase or three-phase motor for direct starting. Sealed and hermetically cast motor, resin-impregnated, with enamel-insulated winding, self-lubricating bearing, with water-glycol filling.
The motor is cooled by the pumped fluid. The motor must always be immersed when operated. The limit values for maximum fluid temperature and minimum flow velocity must be adhered to. Vertical installation is possible with or without cooling jacket. Horizontal installation must be performed in conjunction with a cooling jacket.
The pressure shroud is used for the direct installation of the unit in the pipe system. Standard models are without mounted non-return valves. The maximum inlet pressure is 10 bar.