Wilo-Sub TWI 4
The reliable and corrosion-resistant multistage 4″ submersible pump.
The reliable and corrosion-resistant multistage 4″ submersible pump.
Recommended services
Your advantages
- Long service life thanks to corrosion-resistant stainless steel, optionally 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
Environmentally friendly features
- Durable stainless steel pump material as well as very easy maintenance and repair provide for a long service life
- Energy-efficient pump hydraulics
Design
Multistage 4" submersible pump in tie strap version for vertical or horizontal installation
Application
Designed for pumping drinking water (in accordance with ACS and RI.SE), rainwater and process water with up to 50 g/m³ sand content from wells and rainwater storage tanks for the following applications:
- Irrigation
- Sprinkling
- Water supply
- Pressure boosting
- Ground water drainage and lowering
Equipment/function
- Integrated non-return valve
- Discharge port according to NEMA
- Single-phase current motor with capacitor box with thermal motor protection
Typekey
Example: | Wilo-Sub TWI 4.01-09-C |
TWI | Series |
4 | Diameter of the hydraulic unit in inches ["] |
01 | Rated volume flow [m3/h] |
09 | Number of hydraulic stages |
C | Series generation |
Technical data
- 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
- Discharge port: Rp 1¼ – Rp 2
Materials
- Hydraulics housing: 1.4301 (AISI 304)
- Impellers: 1.4301 (AISI 304)
- Hydraulic shaft: 1.4057 (AISI 431)
- Motor housing: 1.4301 (AISI 304)
- Motor shaft: 1.4305 (AISI 303)
Construction
Submersible pump for vertical or horizontal installation.
Hydraulics
Tie strap version of the multistage submersible pump with radial or semi-axial impellers, integrated non-return valve, and a standardised 4" NEMA connection. Discharge port with threaded flange and female thread. All parts that come in contact with the fluid are made of corrosion-free materials.
Motor
Single-phase or three-phase current motor for direct starting. Sealed motor with lacquer-insulated, resin-covered winding, water-glycol filling and self-lubricating motor bearings.
Cooling
- The motor is cooled by the pumped fluid. Always operate the pump in a submerged state.
- Vertical installation is possible with or without cooling jacket.
- Horizontal installation must be performed in conjunction with a cooling jacket.
Scope of delivery
- Hydraulics + motor completely assembled
- 1.5 m or 2.5 m connection cable with drinking water approval
- AC version including switchbox with capacitor and on/off switch
- Installation and operating instructions
Options
- Hydraulics in 1.4401 (AISI 316)
- Motor in 1.4401 (AISI 316)
- Pressure shroud version for the direct installation of the pump in the pipe system (max. inlet pressure: 10 bar)
- Custom-made
Accessories
- Cooling shroud
- Diaphragm expansion tank
- Gate valve
- Float switch
- Pressure switch
- Electrode
- Switchgear
- Alarm switchgear
- Casting resin kit
- Connection cable
Installation and operating instructions
Wilo-Sub TWI 4..., TWI 4-...-QC
| Article Number | 6061724 |
| Edition | 1110 |
| Number of pages | 344 |
| Language | da, en, et, fi, lv, mk, no, pt, sl, sr |
PDF (2 MB)Wilo-Sub TWI 4..., TWI 4-...-QC
| Article Number | 6061724 |
| Edition | 1110 |
| Number of pages | 28 |
| Language | en |
PDF (516 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 (327 KB)Certificate
Wilo-Sub TWI
| Article Number | 6080451 |
| Edition | 1612 |
| Number of pages | 14 |
| Language | language neutral |
PDF (388 KB)UKCA
UKCA 2223456
| Number of pages | 1 |
| Language | language neutral |
PDF (223 KB)UKCA 2223724
| Number of pages | 1 |
| Language | language neutral |
PDF (194 KB)