Fully submersible, multistage pump for pumping industrial and drinking water (ACS rating) with radial or semi-axial impellers in sectional construction for vertical or horizontal installation, with built-in non-return valve. Corrosion-free, three-phase AC motor for direct or star-delta starting with water-glycol filling, alternatively with drinking water filling. Hermetically cast motor with enamel-insulated winding, resin-impregnated or rewindable with PVC-insulated winding, and self-lubricating bearings. The motor is cooled by the pumped fluid. Therefore, the unit must always be operated immersed. The limit values for maximum fluid temperature and minimum flow velocity must be adhered to. Vertical installation is possible with or without cooling jacket. In cases of horizontal installation, a cooling jacket must always be provided .

Scope of delivery:

• Submersible pump with connection cable and ACS rating
• Installation and operating instructions

Operating data

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

Unit

• Minimum efficiency index (MEI)
  0.4
• Pipe connection on the pressure side
  Rp 2½
• Maximum operating pressure p
  40 bar
• Max. sand content g/m³
  50
• Protection class motor
  IP68
• Max. immersion depth
  350.00 m
• Min. fluid temperature T
  3 °C
• Max. fluid temperature T
  30 °C
• Net weight, approx. m
  112 kg

Motor data

• Mains connection
  3~400 V, 50 Hz
• Rated power P₂
  18.50 kW
• Rated current I_N
  40.00 A
• Activation type
  Star-delta (SD)
• Max. switching frequency t
  20 1/h
• Min. flow rate at the motor m/s
  0.1 m/s

Cable

• Connection cable length
  4.0 m
• Cable cross-section
  2x 4G4 mm²

Materials

• Pump housing
  1.4301, X5CrNi18-10
• Motor housing
  5.1301, EN-GJL-250
• Shaft
  1.4057, X20CrNi17-2
• Impeller
  1.4301, X5CrNi18-10

Information for order placements

• Net weight, approx. m
  112 kg
• Brand
  Wilo
• Product description
  Sub TWI 6.18-31-C-SD
• Article number
  6075220