Centrifugal pump Sub TWU 4-...-GT series

waterelectricsubmersible

Product type

• Submersible pump optimised for geothermal applications

Key features

• Low operating costs due to optimised hydraulics and efficient motors for targeted use in geothermal applications
• High annual performance factor (JAZ) through increased system effectiveness
• High operational reliability thanks to floating impellers and integrated non-return valve
• Easy installation via Quick Connect variant for quick and easy extension of the motor cable

Design
Multistage submersible pump in jacketed construction for vertical and horizontal installation, optimised for geothermal applications.

Application
For pumping thermal water from boreholes or springs for water supply in geothermal applications.

Equipment / Function

• Integrated non-return valve
• Discharge port according to NEMA

Type key (example and meaning)
Example | Wilo-Sub TWU 4.02-03-DM-D-QC-GT
TWU | Series
4 | Diameter of the hydraulic unit in inches ["]
02 | Rated volume flow [m3/h]
03 | Number of hydraulic stages
D | Series generation
QC | Version with Quick Connect cable
GT | Optimised for geothermal applications

Product variants (selection table)
Product description | Mains connection | Motor diameter Ø | Number of stages | Rated power P2 | MEI | Connection | Article number
Sub TWU 4.02-03-DM-D-GT | 3~400 V, 50 Hz | 4 in (") | 3 | 0.25 kW | 0.7 | Rp 1¼ | 6091418
Sub TWU 4.02-03-DM-D-QC-GT | 3~400 V, 50 Hz | 4 in (") | 3 | 0.25 kW | 0.7 | Rp 1¼ | 6091417
Sub TWU 4.02-04-DM-D-GT | 3~400 V, 50 Hz | 4 in (") | 4 | 0.25 kW | 0.7 | Rp 1¼ | 6091416
Sub TWU 4.02-04-DM-D-QC-GT | 3~400 V, 50 Hz | 4 in (") | 4 | 0.25 kW | 0.7 | Rp 1¼ | 6091415
Sub TWU 4.04-04-DM-D-GT | 3~400 V, 50 Hz | 4 in (") | 4 | 0.25 kW | 0.7 | Rp 1¼ | 6091414
Sub TWU 4.04-04-DM-D-QC-GT | 3~400 V, 50 Hz | 4 in (") | 4 | 0.25 kW | 0.7 | Rp 1¼ | 6091413
Sub TWU 4.04-05-DM-D-GT | 3~400 V, 50 Hz | 4 in (") | 5 | 0.37 kW | 0.7 | Rp 1¼ | 6091412
Sub TWU 4.04-05-DM-D-QC-GT | 3~400 V, 50 Hz | 4 in (") | 5 | 0.37 kW | 0.7 | Rp 1¼ | 6091411

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 m/s
• Max. sand content: 50 g/m3
• Max. number of starts: 20/h
• Max. immersion depth: 200 m
• IP rating: IP68
• Discharge port: Rp 1¼

Materials

• Hydraulics housing: 1.4301
• Impellers: Noryl
• Hydraulic shaft: 1.4104
• Motor housing: 1.4301
• Motor shaft: 1.4305

Hydraulics
Multistage submersible pump with radial or semi-axial impellers in sectional construction and integrated non-return valve. Discharge port with threaded flange and female thread. All parts that come in contact with the fluid are made of corrosion-free materials.

Motor
Three-phase motor for direct starting. Sealed motor with lacquer-insulated, resin-covered winding, water-glycol filling and self-lubricating motor bearings.

Cooling

• Motor is cooled by the pumped fluid; always operate pump in submerged state
• Vertical installation possible with or without cooling jacket
• Horizontal installation must be performed with a cooling jacket

Scope of delivery

• Hydraulics + motor completely assembled
• TWU 4 ... QC-GT: 1.5 m Quick Connect cable
• TWU 4 ... -GT: 15 m connection cable
• Installation and operating instructions

Accessories

• Cooling shroud
• Diaphragm expansion tank
• Gate valve
• Float switch
• Pressure switch
• Electrode
• Switchgear
• Alarm switchgear
• Casting resin kit
• Connection cable

Caractéristiques / spécifications techniques

• Mains connection: 3~400 V, 50 Hz
• Operating mode: submerged (S1)
• Fluid temperature range: 3–30 °C
• Minimum flow rate at motor: 0.08 m/s
• Maximum sand content: 50 g/m3
• Maximum number of starts: 20/h
• Maximum immersion depth: 200 m
• IP rating: IP68
• Discharge connection: Rp 1¼
• Hydraulic materials: stainless steels 1.4301 / 1.4104 and impellers in Noryl