Wilo-Sub TWI 6 | Wilo

Wilo-Sub TWI 6

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

Wilo-Live Assistant

Sub TWI 6

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 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

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

PDF (3 MB)

Wilo-Sub TWI 4-6

Article Number	4069717
Edition	2021-10
Number of pages	12

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

PDF (4 MB)

Certificate

Wilo-Sub TWI

Article Number	6080451
Edition	1612
Number of pages	14

PDF (388 KB)

Number of results: 94

0.55 … 37 kW

[94]

Product description	Motor diameter Ø	Number of stages	Rated power P₂	Minimum efficiency index (MEI)	Connection	Article number
Sub TWI 6.18-07-C	4 in (")	7	3.7 kW	≥0.4	Rp 2½	6075205
Sub TWI 6.18-10-C	4 in (")	10	5.5 kW	≥0.4	Rp 2½	6075206
Sub TWI 6.18-13-C	5 in (")	13	7.5 kW	≥0.4	Rp 2½	6075207
Sub TWI 6.18-17-C	5 in (")	17	9.3 kW	≥0.4	Rp 2½	6075208
Sub TWI 6.18-20-C	5 in (")	20	11 kW	≥0.4	Rp 2½	6075209
Sub TWI 6.18-20-C-SD	5 in (")	20	11 kW	≥0.4	Rp 2½	6075210
Sub TWI 6.18-22-C	5 in (")	22	15 kW	≥0.4	Rp 2½	6075211
Sub TWI 6.18-22-C-SD	5 in (")	22	15 kW	≥0.4	Rp 2½	6075212
Sub TWI 6.18-24-C	5 in (")	24	15 kW	≥0.4	Rp 2½	6075213
Sub TWI 6.18-24-C-SD	5 in (")	24	15 kW	≥0.4	Rp 2½	6075214
Sub TWI 6.18-27-C	5 in (")	27	15 kW	≥0.4	Rp 2½	6075215
Sub TWI 6.18-27-C-SD	5 in (")	27	15 kW	≥0.4	Rp 2½	6075216
Sub TWI 6.18-29-C	5 in (")	29	18.5 kW	≥0.4	Rp 2½	6075217
Sub TWI 6.18-29-C-SD	5 in (")	29	18.5 kW	≥0.4	Rp 2½	6075218
Sub TWI 6.18-31-C	5 in (")	31	18.5 kW	≥0.4	Rp 2½	6075219
Sub TWI 6.18-31-C-SD	5 in (")	31	18.5 kW	≥0.4	Rp 2½	6075220
Sub TWI 6.18-33-C	5 in (")	33	18.5 kW	≥0.4	Rp 2½	6075221
Sub TWI 6.18-33-C-SD	5 in (")	33	18.5 kW	≥0.4	Rp 2½	6075222
Sub TWI 6.18-36-C	5 in (")	36	22 kW	≥0.4	Rp 2½	6075223
Sub TWI 6.18-36-C-SD	5 in (")	36	22 kW	≥0.4	Rp 2½	6075224
Sub TWI 6.18-38-C	5 in (")	38	22 kW	≥0.4	Rp 2½	6075225
Sub TWI 6.18-38-C-SD	5 in (")	38	22 kW	≥0.4	Rp 2½	6075226
Sub TWI 6.18-40-C	5 in (")	40	22 kW	≥0.4	Rp 2½	6075227
Sub TWI 6.18-40-C-SD	5 in (")	40	22 kW	≥0.4	Rp 2½	6075228
Sub TWI 6.30-04-C	4 in (")	4	3.7 kW	≥0.4	Rp 3	6075231
Sub TWI 6.30-06-C	4 in (")	6	5.5 kW	≥0.4	Rp 3	6075232
Sub TWI 6.30-08-C	5 in (")	8	7.5 kW	≥0.4	Rp 3	6075233
Sub TWI 6.30-11-C	5 in (")	11	11 kW	≥0.4	Rp 3	6075234
Sub TWI 6.30-11-C-SD	5 in (")	11	11 kW	≥0.4	Rp 3	6075235
Sub TWI 6.30-13-C	5 in (")	13	15 kW	≥0.4	Rp 3	6075236
Sub TWI 6.30-13-C-SD	5 in (")	13	15 kW	≥0.4	Rp 3	6075237
Sub TWI 6.30-15-C	5 in (")	15	15 kW	≥0.4	Rp 3	6075238
Sub TWI 6.30-15-C-SD	5 in (")	15	15 kW	≥0.4	Rp 3	6075239
Sub TWI 6.30-17-C	5 in (")	17	15 kW	≥0.4	Rp 3	6075240
Sub TWI 6.30-17-C-SD	5 in (")	17	15 kW	≥0.4	Rp 3	6075241
Sub TWI 6.30-19-C	5 in (")	19	18.5 kW	≥0.4	Rp 3	6075242
Sub TWI 6.30-19-C-SD	5 in (")	19	18.5 kW	≥0.4	Rp 3	6075243
Sub TWI 6.30-21-C	5 in (")	21	18.5 kW	≥0.4	Rp 3	6075244
Sub TWI 6.30-21-C-SD	5 in (")	21	18.5 kW	≥0.4	Rp 3	6075245
Sub TWI 6.30-24-C	5 in (")	24	22 kW	≥0.4	Rp 3	6075246
Sub TWI 6.30-24-C-SD	5 in (")	24	22 kW	≥0.4	Rp 3	6075247
Sub TWI 6.30-26-C	5 in (")	26	30 kW	≥0.4	Rp 3	6075248
Sub TWI 6.30-26-C-SD	5 in (")	26	30 kW	≥0.4	Rp 3	6075249
Sub TWI 6.30-29-C	5 in (")	29	30 kW	≥0.4	Rp 3	6075250
Sub TWI 6.30-29-C-SD	5 in (")	29	30 kW	≥0.4	Rp 3	6075251
Sub TWI 6.30-32-C	5 in (")	32	30 kW	≥0.4	Rp 3	6075252
Sub TWI 6.30-32-C-SD	5 in (")	32	30 kW	≥0.4	Rp 3	6075253
Sub TWI 6.30-35-C	5 in (")	35	30 kW	≥0.4	Rp 3	6075254
Sub TWI 6.30-35-C-SD	5 in (")	35	30 kW	≥0.4	Rp 3	6075255
Sub TWI 6.50-03-C	4 in (")	3	5.5 kW	≥0.4	Rp 3	6075257