Sub TWI 4

Submersible pump

Multistage 4" submersible pump in tie strap version for vertical or horizontal installation

Wilo-TWI 4

Number of results: [97]

Mains connection

1~230 V, 50 Hz [39]

3~400 V, 50 Hz [58]

Rated power P₂

[0]

Product description	Mains connection	Motor diameter Ø	Number of stages	Rated power P₂	Minimum efficiency index (MEI)	Connection	Article number
Sub TWI 4.01-09-DM-E	3~400 V, 50 Hz	4 in (")	9	0.37 kW	≥ 0.4	Rp 1¼	6101800
Sub TWI 4.01-09-EM-E	1~230 V, 50 Hz	4 in (")	9	0.37 kW	≥ 0.4	Rp 1¼	6101801
Sub TWI 4.01-14-DM-E	3~400 V, 50 Hz	4 in (")	14	0.55 kW	≥ 0.4	Rp 1¼	6101802
Sub TWI 4.01-14-EM-E	1~230 V, 50 Hz	4 in (")	14	0.55 kW	≥ 0.4	Rp 1¼	6101803
Sub TWI 4.01-18-DM-E	3~400 V, 50 Hz	4 in (")	18	0.55 kW	≥ 0.4	Rp 1¼	6101804
Sub TWI 4.01-18-EM-E	1~230 V, 50 Hz	4 in (")	18	0.55 kW	≥ 0.4	Rp 1¼	6101805
Sub TWI 4.01-21-DM-E	3~400 V, 50 Hz	4 in (")	21	0.75 kW	≥ 0.4	Rp 1¼	6101806
Sub TWI 4.01-21-EM-E	1~230 V, 50 Hz	4 in (")	21	0.75 kW	≥ 0.4	Rp 1¼	6101807
Sub TWI 4.01-28-DM-E	3~400 V, 50 Hz	4 in (")	28	1.1 kW	≥ 0.4	Rp 1¼	6101808
Sub TWI 4.01-28-EM-E	1~230 V, 50 Hz	4 in (")	28	1.1 kW	≥ 0.4	Rp 1¼	6101809
Sub TWI 4.01-36-DM-E	3~400 V, 50 Hz	4 in (")	36	1.1 kW	≥ 0.4	Rp 1¼	6101810
Sub TWI 4.01-36-EM-E	1~230 V, 50 Hz	4 in (")	36	1.1 kW	≥ 0.4	Rp 1¼	6101811
Sub TWI 4.01-42-DM-E	3~400 V, 50 Hz	4 in (")	42	1.5 kW	≥ 0.4	Rp 1¼	6101812
Sub TWI 4.01-42-EM-E	1~230 V, 50 Hz	4 in (")	42	1.5 kW	≥ 0.4	Rp 1¼	6101813
Sub TWI 4.02-09-DM-E	3~400 V, 50 Hz	4 in (")	9	0.55 kW	≥ 0.7	Rp 1¼	6101814
Sub TWI 4.02-09-EM-E	1~230 V, 50 Hz	4 in (")	9	0.55 kW	≥ 0.4	Rp 1¼	6101815
Sub TWI 4.02-13-DM-E	3~400 V, 50 Hz	4 in (")	13	0.75 kW	≥ 0.7	Rp 1¼	6101816
Sub TWI 4.02-13-EM-E	1~230 V, 50 Hz	4 in (")	13	0.75 kW	≥ 0.7	Rp 1¼	6101817
Sub TWI 4.02-18-DM-E	3~400 V, 50 Hz	4 in (")	18	1.1 kW	≥ 0.7	Rp 1¼	6101818
Sub TWI 4.02-18-EM-E	1~230 V, 50 Hz	4 in (")	18	1.1 kW	≥ 0.7	Rp 1¼	6101819
Sub TWI 4.02-23-DM-E	3~400 V, 50 Hz	4 in (")	23	1.1 kW	≥ 0.7	Rp 1¼	6101820
Sub TWI 4.02-23-EM-E	1~230 V, 50 Hz	4 in (")	23	1.1 kW	≥ 0.7	Rp 1¼	6101821
Sub TWI 4.02-28-DM-E	3~400 V, 50 Hz	4 in (")	28	1.5 kW	≥ 0.7	Rp 1¼	6101822
Sub TWI 4.02-28-EM-E	1~230 V, 50 Hz	4 in (")	28	1.5 kW	≥ 0.7	Rp 1¼	6101823
Sub TWI 4.02-33-DM-E	3~400 V, 50 Hz	4 in (")	33	1.5 kW	≥ 0.7	Rp 1¼	6101824
Sub TWI 4.02-33-EM-E	1~230 V, 50 Hz	4 in (")	33	1.5 kW	≥ 0.7	Rp 1¼	6101825
Sub TWI 4.02-40-DM-E	3~400 V, 50 Hz	4 in (")	40	2.2 kW	≥ 0.7	Rp 1¼	6101826
Sub TWI 4.02-40-EM-E	1~230 V, 50 Hz	4 in (")	40	2.2 kW	≥ 0.7	Rp 1¼	6101827
Sub TWI 4.02-48-DM-E	3~400 V, 50 Hz	4 in (")	48	2.2 kW	≥ 0.7	Rp 1¼	6101828
Sub TWI 4.02-48-EM-E	1~230 V, 50 Hz	4 in (")	48	2.2 kW	≥ 0.7	Rp 1¼	6101829
Sub TWI 4.03-06-DM-E	3~400 V, 50 Hz	4 in (")	6	0.55 kW	≥ 0.7	Rp 1¼	6101830
Sub TWI 4.03-06-EM-E	1~230 V, 50 Hz	4 in (")	6	0.55 kW	≥ 0.7	Rp 1¼	6101831
Sub TWI 4.03-09-DM-E	3~400 V, 50 Hz	4 in (")	9	0.75 kW	≥ 0.7	Rp 1¼	6101832
Sub TWI 4.03-09-EM-E	1~230 V, 50 Hz	4 in (")	9	0.75 kW	≥ 0.7	Rp 1¼	6101833
Sub TWI 4.03-12-DM-E	3~400 V, 50 Hz	4 in (")	12	1.1 kW	≥ 0.7	Rp 1¼	6101834
Sub TWI 4.03-12-EM-E	1~230 V, 50 Hz	4 in (")	12	1.1 kW	≥ 0.7	Rp 1¼	6101835
Sub TWI 4.03-15-DM-E	3~400 V, 50 Hz	4 in (")	15	1.1 kW	≥ 0.7	Rp 1¼	6101836
Sub TWI 4.03-15-EM-E	1~230 V, 50 Hz	4 in (")	15	1.1 kW	≥ 0.7	Rp 1¼	6101837
Sub TWI 4.03-18-DM-E	3~400 V, 50 Hz	4 in (")	18	1.5 kW	≥ 0.7	Rp 1¼	6101838
Sub TWI 4.03-18-EM-E	1~230 V, 50 Hz	4 in (")	18	1.5 kW	≥ 0.7	Rp 1¼	6101839

Sub TWI 4, (3~400 V)

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

Type key

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
IP rating: 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

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