Wilo-Sub TWU 4-...-GT

Your advantages

• Low operating costs thanks 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 thanks to Quick-Connect variant for extending the motor cable easily and quickly

Construction

Multistage 4" submersible pump in jacketed construction for vertical and horizontal installation

Application

• Geothermal applications
• For water supply from boreholes and rainwater storage tanks
• For domestic water supply, sprinkling and irrigation
• Pressure boosting
• Lowering of the water level
• For pumping water without long-fibre and abrasive constituents

Equipment/function

• Multistage submersible pump with radial or semi-axial impellers
• Hermetically sealed motors
• Integrated non-return valve
• NEMA coupling
• Three-phase current motor

Scope of delivery

• Hydraulics and motor ready assembled
• Connection cable with drinking water approval (TWU 4-…-GT with 15 m cable; TWU 4-…-QC-GT with short cable and plug for rapid replacement)
• Installation and operating instructions

Type key

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
• Protection class: IP68
• Pressure connection: Rp 1¼

Materials

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

Description/construction

Submersible pump for vertical or horizontal installation.

Hydraulics

Multistage submersible pump with radial or semi-axial impellers in sectional construction. Integrated non-return valve. All parts that come in contact with the fluid are made of corrosion-free materials.

Motor

Corrosion-free three-phase AC motor for direct starting. Sealed and hermetically cast motor with enamel-insulated winding, resin-impregnated, 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.