Wilo Sub TWU 4-GT Stainless Steel Submersible Deep-Well Pump (4-inch) for Geothermal Applications

Sub TWU 4.02-03-DM-D-GT、Sub TWU 4.02-03-DM-D-QC-GT、Sub TWU 4.02-04-DM-D-GT、Sub TWU 4.02-04-DM-D-QC-GT、Sub TWU 4.04-04-DM-D-GT、Sub TWU 4.04-04-DM-D-QC-GT、Sub TWU 4.04-05-DM-D-GT、Sub TWU 4.04-05-DM-D-QC-GT

The Wilo-Sub TWU 4-GT is a 4-inch stainless steel submersible borehole pump specifically designed for geothermal applications.Constructed from high-grade stainless steel and featuring specialized mechanical seals,it offers exceptional resistance to high temperatures and corrosion,making it perfectly suited for the demanding conditions of high-temperature geothermal fluids.Highly efficient and stable

Product Consultation By telephone

Function

Parameters

Size

Video Introduction

Function

Features/Product Advantages

Optimized hydraulics and high-efficiency motors tailored for geothermal applications help reduce operating costs
High system efficiency results in a high Annual Performance Factor (APF)
Floating impellers and an integrated non-return valve ensure high operational reliability
Easy installation via quick-connect coupling; motor cable can be conveniently extended

Construction

Multi-stage 4" submersible pump with jacketed design; suitable for vertical or horizontal installation in geothermal applications

Applications

Pumping hot water from boreholes or wells for geothermal supply.

Equipment/Functions

Integrated non-return valve
NEMA connection

Model Code

Example:	Wilo-Sub TWU 4.02-03-DM-D-QC-GT
TWU	series
4	Hydraulic component diameter, unit: inches ["]
02	Rated volumetric flow rate [m³/h]
03	Number of hydraulic stages
D	Product Series
QC	Specifications for Quick Connect cables
GT	Suitable for geothermal applications

Technical Data

Mains connection: 3~400 V, 50 Hz
Operation mode (submerged): S1
Fluid temperature: 3 – 30 °C
Minimum flow at motor: 0.08 m/s
Max. sand content: 50 g/m³
Max. starts per hour: 20/h
Max. immersion depth: 200 m
Protection class: IP68
Pressure connection: Rp 1¼

Materials

Hydraulics housing: 1.4301
Impeller: Modified PPO
Hydraulics shaft: 1.4104
Motor housing: 1.4301
Motor shaft: 1.4305

Type

Submersible pump suitable for vertical or horizontal installation.

Hydraulics

Multi-stage submersible pump with sectional construction, featuring radial or semi-axial impellers and an integrated non-return valve. Pressure port with threaded flange and internal thread. All parts in contact with the fluid are made of corrosion-resistant materials.

Motor

Three-phase AC motor for direct-on-line starting. Sealed motor featuring resin-impregnated windings with enamel insulation, a water-glycol fill, and self-lubricating motor bearings.

Cooling

The motor is cooled by the pumped fluid. The pump must be operated submerged.
Vertical installation is possible with or without a cooling shroud.
Horizontal installation requires the use of a cooling shroud.

As-delivered condition

Hydraulic unit + motor, ready for installation
TWU 4 ... QC-GT: 1.5 m Quick Connect power cable
TWU 4 ... -GT: 15 m power cable
Installation and operating instructions

Accessories

Cooling shroud
Diaphragm pressure vessel
Gate valve
Float switch
Pressure switch
Electrodes
Switchgear
Alarm device
Cast-resin joint kit
Power cable

Parameters

model	Voltage (V)	Flow rate (m³/h)	Head (m)	Power (kW)	Motor diameter (mm)	caliber
Sub TWU 4.02-03-DM-D-GT	380V	2	16.13	0.25	95	Rp 1 1/4
Sub TWU 4.02-03-DM-D-QC-GT	380V	2	16.13	0.25	95	Rp 1 1/4
Sub TWU 4.02-04-DM-D-GT	380V	2	21.5	0.25	95	Rp 1 1/4
Sub TWU 4.02-04-DM-D-QC-GT	380V	2	21.5	0.25	95	Rp 1 1/4
Sub TWU 4.04-04-DM-D-GT	380V	3.4	18.16	0.25	95	Rp 1 1/4
Sub TWU 4.04-04-DM-D-QC-GT	380V	3.4	18.16	0.25	95	Rp 1 1/4
Sub TWU 4.04-05-DM-D-GT	380V	3.4	22.71	0.37	95	Rp 1 1/4
Sub TWU 4.04-05-DM-D-QC-GT	380V	3.4	22.71	0.37	95	Rp 1 1/4