Wilo-Sub TWI 6
Your 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
Recommended services
Design
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
Typekey
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 modeWithout = Direct startingSD = 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
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.
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
Options
- Hydraulics in stainless steel 1.4401
- Stainless steel motor in 1.4401, 1.4408 or 1.4571
- 60 Hz version
- Star-delta starting
- Rewindable motor
- Rewindable motor with drinking water filling
- Configured units for special versions
Accessories
- Cooling jacket pipes
- Pressure shroud (for configured units)
- Cable kits for drinking water and process water
- Switchgears
Installation and operating instructions
Wilo-Sub TWI 4-6
| Article Number | 4069717 |
| Edition | 2021-10 |
| Number of pages | 60 |
| Language | bg, cs, da, el, en, et, fi, hr, hu, it, lt, lv, mk, nl, no, pl, pt, ro, sl, sr, sv, uk |
PDF (3 MB)Wilo-Sub TWI 4-6
| Article Number | 4069717 |
| Edition | 2021-10 |
| Number of pages | 12 |
| Language | en |
PDF (980 KB)Certification booklet
Wilo-Sub TWI 4, Wilo-Sub TWI 6/TWI 06, Wilo-Sub TWI 8/TWI 08, Wilo-Sub TWI 010
| Article Number | 6080451 |
| Edition | 2022-02 |
| Number of pages | 24 |
| Language | language neutral |
PDF (4 MB)Group Statement
Group Statement REACH
| Edition | 2021-05 |
| Number of pages | 5 |
| Language | language neutral |
PDF (279 KB)Certificate
Wilo-Sub TWI
| Article Number | 6080451 |
| Edition | 1612 |
| Number of pages | 14 |
| Language | language neutral |
PDF (388 KB)