Wilo-Sub TWI 6

Series description

Special features/product advantages

  • Long service life thanks to corrosion-resistant stainless steel, optionally in V4A quality
  • ACS certified for domestic hot 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

Design type

Multistage 6" submersible pump in tie strap version for vertical or horizontal installation

Application

  • For water and drinking water supply from boreholes and rainwater storage tanks
  • Process water supply
  • For municipal water supply, sprinkling and irrigation
  • Pressure boosting
  • Lowering the water level
  • For pumping water in industrial applications
  • For pumping water without long-fibre and abrasive constituents

Equipment/function

  • Multistage submersible-motor pump with radial or semi-axial impellers
  • Integrated non-return valve
  • NEMA coupling
  • Three-phase motor
  • Hermetically cast motors
  • Rewindable motors

Scope of delivery

  • Hydraulics and motor ready assembled
  • 4/5/10 m connecting cable approved for drinking water (cross-section: 4x2.5 mm2 or 4x4 mm2)
  • Installation and operating instructions

Type key

Example:

Wilo-Sub TWI 6.18-04-C-SD

TWI

Submersible pump

6

Diameter of the hydraulic unit in inches ["]

18

Rated volume flow [m3/h]

04

Number of hydraulic stages

C

Series generation

I

Motor shroud in 1.4571, motor connection via flat male tab

SD

Starting mode Without = Direct starting SD = star-delta starting

Technical data

  • Mains connection: 3~400 V, 50 Hz
  • Submerged operating mode: S1
  • Fluid temperature: 3-30 °C
  • Minimum flow rate at motor:
    • Hermetically cast motors: 0.08 - 0.16 m/s
    • Rewindable motors (SD-R): 0.1 - 0.5 m/s (depending on type)
  • Max. sand content: 50 g/m3
  • Max. number of starts: 20/h
  • Max. submersion depth:
    • Hermetically cast motors: 350 m
    • Rewindable motors: 100 m
  • Protection class: IP 68
  • Pressure connection: Rp 2½ - Rp 3

Materials

  • Hydraulic housing: Stainless steel 1.4301
  • Impellers: Stainless steel 1.4301
  • Hydraulic shaft: Stainless steel 1.4057
  • Motor housing: EN-GJL or stainless steel 1.4301
  • Motor shaft: Stainless steel 1.4305 or 1.4301

Description/construction

Submersible pump with ACS approval for vertical or horizontal installation.

Hydraulics

Multistage submersible-motor pump with 4" or 6" 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.

Motor

Three-phase motor for direct and star-delta start. Sealed, hermetically cast motor with enamel-insulated winding, resin-impregnated, or rewindable motor with PVC-insulated winding, self-lubricating bearing, with water-glycol filling.

Cooling

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.

Pressure shroud

The pressure shroud is used for the direct installation of the unit in the pipe network. Standard models are without mounted non-return valves. The maximum inlet pressure is 10 bar.

Downloads

General overview 2018 International version

Article Number 2200591
Edition 2018
Version number 1
Page format 209.9 x 297.0 mm
Number of pages 72

PDF (11 MB)

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