Special features/product advantages

• 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 type

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 the water level
• For pumping water without long-fibre and abrasive constituents

Equipment/function

• Multi-stage submersible pump with radial or semi-axial impellers
• Hermetically cast motors
• Integrated non-return valve
• NEMA coupling
• Three-phase motor

Scope of delivery

• Hydraulics and motor ready assembled
• Connection cable with potable water approval (TWU 4-…-GT with 15 m cable; TWU 4-…-GT-QC 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. submersion depth: 200 m
• Protection class: IP 68
• Pressure connection: Rp 1¼

Materials

• Hydraulic housing: Stainless steel 1.4301
• Impellers: Noryl
• Hydraulics 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

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

Motor

Corrosion-free three-phase 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 fluid. The motor must always be operated in submerged state. The limit values for the maximum fluid temperature and the minimum flow rate must not be exceeded. Vertical installation is possible optionally with or without cooling jacket. Cooling jacket is required for horizontal installation.