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Wilo-Sub TWI 6 | Wilo
Your advantages
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

Series description
Sub TWI 6

Design

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

Application

For pumping drinking water (acc. to ACS and RI.SE), rainwater and industrial water with a maximum sand content of 50 g/m³ from boreholes and wells for:

  • Irrigation
  • Sprinkling
  • Water supply
  • Pressure boosting
  • Groundwater level and lowering

Equipment/function

  • Integrated non-return valve
  • Discharge port acc. to NEMA

Typekey

Example:

Wilo-Sub TWI 6.18-04-C-SD

TWI

Series

6

Diameter of the hydraulic unit in inches ["]

18

Rated volume flow [m3/h]

04

Number of hydraulic stages

C

Series generation

SD

Starting method

  • 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: 0.08 - 0.5 m/s (depending on motor)
  • Max. sand content: 50 g/m3
  • Max. number of starts: 20/h
  • Max. submersion depth: 100 m or 350 m (depending on motor)
  • Protection class: IP68
  • Pressure connection: Rp 2½ - Rp 3

Materials

  • Hydraulics housing: 1.4301 (AISI 304)
  • Impellers: 1.4301 (AISI 304)
  • Hydraulics shaft: 1.4057 (AISI 431)
  • Motor housing: 1.4301 (AISI 304)
  • Motor shaft: 1.4301 (AISI 304) or 1.4305 (AISI 303)

Construction

Submersible motor pump for vertical or horizontal installation.

Hydraulics

Multistage submersible-motor pump in tie strap version with radial or semi-axial impellers, integrated non-return valve and a standardised connection:

  • 4" motor connection: NEMA standard
  • 6" motor connection: NEMA standard

Discharge port with threaded flange and internal thread. All parts that come in contact with the fluid are made of corrosion-free materials.

Motor

Three-phase AC motor for direct or star-delta start:

  • Encapsulated motor with enamel-insulated, resin-impregnated winding and water-glycol filling
  • Rewindable motor with PVC-insulated winding and water-glycol filling

The motor bearings are self-lubricating.

Cooling

  • The motor is cooled by the pumped fluid. Operate the motor always immersed.
  • 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
  • 4 m, 5 m or 10 m connecting cable with drinking water approval
  • Installation and operating instructions

Options

  • Hydraulics in 1.4401 (AISI 316)
  • Motor in 1.4401 (AISI 316), 1.4408 (ASTM A 351) or 1.4571 (AISI 316TI)
  • Rewindable motor
  • Motor with drinking water filling
  • Pressure shroud version for the direct installation of the pump in the pipe system (max. inlet pressure: 10 bar)
  • Custom-made

Accessories

  • Cooling jacket
  • Booster shroud
  • Diaphragm pressure vessel
  • Gate valve
  • Float switch
  • Pressure switch
  • Electrode
  • Switchgear
  • Alarm switchgear
  • Casting resin kit
  • Connection cable
Documents

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 (327 KB)

Certificate

Wilo-Sub TWI

Article Number 6080451
Edition 1612
Number of pages 14
Language language neutral
PDF (388 KB)
Product selection
Number of results: 94
Rated power P2
0.55 … 37 kW
[94]
Product descriptionMains connectionMotor diameter ØNumber of stagesRated power P2Minimum efficiency index (MEI)ConnectionArticle number
Sub TWI 6.30-29-C
3~400 V, 50 Hz
5 in (")
29
30 kW
≥0.4
Rp 3
6075250
Sub TWI 6.30-29-C-SD
3~400 V, 50 Hz
5 in (")
29
30 kW
≥0.4
Rp 3
6075251
Sub TWI 6.30-32-C
3~400 V, 50 Hz
5 in (")
32
30 kW
≥0.4
Rp 3
6075252
Sub TWI 6.30-32-C-SD
3~400 V, 50 Hz
5 in (")
32
30 kW
≥0.4
Rp 3
6075253
Sub TWI 6.30-35-C
3~400 V, 50 Hz
5 in (")
35
30 kW
≥0.4
Rp 3
6075254
Sub TWI 6.30-35-C-SD
3~400 V, 50 Hz
5 in (")
35
30 kW
≥0.4
Rp 3
6075255
Sub TWI 6.50-02-D
3~400 V, 50 Hz
4 in (")
2
3 kW
≥0.4
Rp 3
6091430
Sub TWI 6.50-03-C
3~400 V, 50 Hz
4 in (")
3
5.5 kW
≥0.4
Rp 3
6075257
Sub TWI 6.50-05-C
3~400 V, 50 Hz
5 in (")
5
7.5 kW
≥0.4
Rp 3
6075258
Sub TWI 6.50-07-C
3~400 V, 50 Hz
5 in (")
-
11 kW
≥0.4
Rp 3
6075259
Sub TWI 6.50-07-C-SD
3~400 V, 50 Hz
5 in (")
-
11 kW
≥0.4
Rp 3
6075260
Sub TWI 6.50-10-C
3~400 V, 50 Hz
5 in (")
10
15 kW
≥0.4
Rp 3
6075261
Sub TWI 6.50-10-C-SD
3~400 V, 50 Hz
5 in (")
10
15 kW
≥0.4
Rp 3
6075262
Sub TWI 6.50-12-C
3~400 V, 50 Hz
5 in (")
12
18.5 kW
≥0.4
Rp 3
6075263
Sub TWI 6.50-12-C-SD
3~400 V, 50 Hz
5 in (")
12
18.5 kW
≥0.4
Rp 3
6075264
Sub TWI 6.50-15-C
3~400 V, 50 Hz
5 in (")
15
22 kW
≥0.4
Rp 3
6075265
Sub TWI 6.50-15-C-SD
3~400 V, 50 Hz
5 in (")
15
22 kW
≥0.4
Rp 3
6075266
Sub TWI 6.50-17-C
3~400 V, 50 Hz
5 in (")
17
30 kW
≥0.4
Rp 3
6075267
Sub TWI 6.50-17-C-SD
3~400 V, 50 Hz
5 in (")
17
30 kW
≥0.4
Rp 3
6075268
Sub TWI 6.50-19-C
3~400 V, 50 Hz
5 in (")
19
30 kW
≥0.4
Rp 3
6075269
Sub TWI 6.50-19-C-SD
3~400 V, 50 Hz
5 in (")
19
30 kW
≥0.4
Rp 3
6075270
Sub TWI 6.50-22-C
3~400 V, 50 Hz
5 in (")
22
37 kW
≥0.4
Rp 3
6075271
Sub TWI 6.50-22-C-SD
3~400 V, 50 Hz
5 in (")
22
37 kW
≥0.4
Rp 3
6075272
Sub TWI 6.50-24-C
3~400 V, 50 Hz
5 in (")
24
37 kW
≥0.4
Rp 3
6075273
Sub TWI 6.50-24-C-SD
3~400 V, 50 Hz
5 in (")
24
37 kW
≥0.4
Rp 3
6075274
Sub TWI 6.60-02-C
3~400 V, 50 Hz
4 in (")
2
3.7 kW
≥0.4
Rp 3
6075275
Sub TWI 6.60-03-C
3~400 V, 50 Hz
4 in (")
3
5.5 kW
≥0.4
Rp 3
6075276
Sub TWI 6.60-04-C
3~400 V, 50 Hz
5 in (")
4
7.5 kW
≥0.4
Rp 3
6075277
Sub TWI 6.60-06-C
3~400 V, 50 Hz
5 in (")
6
11 kW
≥0.4
Rp 3
6075278
Sub TWI 6.60-06-C-SD
3~400 V, 50 Hz
5 in (")
6
11 kW
≥0.4
Rp 3
6075279
Sub TWI 6.60-08-C
3~400 V, 50 Hz
5 in (")
8
15 kW
≥0.4
Rp 3
6075280
Sub TWI 6.60-08-C-SD
3~400 V, 50 Hz
5 in (")
8
15 kW
≥0.4
Rp 3
6075281
Sub TWI 6.60-10-C
3~400 V, 50 Hz
5 in (")
10
18.5 kW
≥0.4
Rp 3
6075282
Sub TWI 6.60-10-C-SD
3~400 V, 50 Hz
5 in (")
10
18.5 kW
≥0.4
Rp 3
6075283
Sub TWI 6.60-12-C
3~400 V, 50 Hz
5 in (")
12
22 kW
≥0.4
Rp 3
6075284
Sub TWI 6.60-12-C-SD
3~400 V, 50 Hz
5 in (")
12
22 kW
≥0.4
Rp 3
6075285
Sub TWI 6.60-14-C
3~400 V, 50 Hz
5 in (")
14
30 kW
≥0.4
Rp 3
6075286
Sub TWI 6.60-14-C-SD
3~400 V, 50 Hz
5 in (")
14
30 kW
≥0.4
Rp 3
6075287
Sub TWI 6.60-16-C
3~400 V, 50 Hz
5 in (")
16
30 kW
≥0.4
Rp 3
6075288
Sub TWI 6.60-16-C-SD
3~400 V, 50 Hz
5 in (")
16
30 kW
≥0.4
Rp 3
6075289
Sub TWI 6.60-18-C
3~400 V, 50 Hz
5 in (")
18
30 kW
≥0.4
Rp 3
6075290
Sub TWI 6.60-18-C-SD
3~400 V, 50 Hz
5 in (")
18
30 kW
≥0.4
Rp 3
6075291
Sub TWI 6.60-20-C
3~400 V, 50 Hz
5 in (")
20
37 kW
≥0.4
Rp 3
6075292
Sub TWI 6.60-20-C-SD
3~400 V, 50 Hz
5 in (")
20
37 kW
≥0.4
Rp 3
6075293