Fully submersible, multistage submersible pump with radial or semi-axial impellers in sectional construction for vertical or horizontal installation, with built-in non-return valve. Corrosion-free single-phase or three-phase AC motor for direct starting with water-glycol filling. Hermetically sealed with enamel-insulated windings, resin-impregnated and self-lubricating bearings. The motor is cooled by the pumped fluid. Therefore, the unit must always be operated immersed. Horizontal installation must be performed in conjunction with a cooling jacket.

For pumping water out of boreholes with a maximum immersion depth of 200 m and a max. sand content of 50 g/m³.

Scope of delivery:

• Hydraulics + motor completely assembled
• Connection cable approved for drinking water
• Single-phase version including switchbox with capacitor, thermal motor protection and On/Off switch
• Installation and operating instructions

Operating data

• Fluid media
  Water
• Max. delivery head H
  72.50 m

Unit

• Minimum efficiency index (MEI)
  0.4
• Pipe connection on the pressure side DNd
  Rp 2
• Maximum operating pressure p
  40 bar
• Max. sand content
  50
• Protection class motor
  IP68
• Max. immersion depth
  200.00 m
• Min. fluid temperature T_min
  3 °C
• Max. fluid temperature T_max
  30 °C
• Net weight, approx. m
  29 kg

Motor data

• Mains connection
  3~400 V, 50 Hz
• Rated power P₂
  3.00 kW
• Rated speed n
  2830 rpm
• Rated current I_N
  7.30 A
• Activation type
  Direct (D)
• Max. switching frequency t
  20 1/h
• Min. flow rate at the motor m/s
  0.8 m/s

Cable

• Connection cable length
  2.5 m
• Cable cross-section
  4G1,5 mm²

Materials

• Pump housing
  1.4301
• Motor housing
  1.4301
• Shaft
  1.4104
• Impeller
  PPE

Information for order placements

• Net weight, approx. m
  29 kg
• Brand
  Wilo
• Product description
  Sub TWU4.16-16-C (3~400 V, 50 Hz)
• Article number
  6082866