Wilo TWU 4.08-21-DM-C, Borehole Pump

Description

Fully submersible, multi-stage borehole pump with radial or semi-axial impellers in articulated construction for vertical or horizontal installation, with integrated non-return valve. Corrosion-free single-phase or three-phase motor for direct start with water-glycol filling. Hermetically sealed with lacquer-insulated winding, resin-impregnated and self-lubricating layer. The motor is cooled by the medium. The unit must always be used submerged. For horizontal installation, cooling jacket must be used :For pumping water from boreholes with a maximum immersion depth of 200 m and a maximum sand amount of 50 g/m³.

Hydraulic Data

• Minimum Effectiveness Index (MEI): ≥0.4
• Maximum operating pressure PN: 15 bar
• Max. sand content: 50 g/m³
• Max. immersion depth: 200 m
• Flow max. Qmax: 13.0 m³/h
• Optimal flow Qopt: 7.2 m³/h
• Call height max. Hmax: 130.6 m
• Optimum call height Hopt: 98.51 m
• Min. medium temperature Tmin: 3 °C
• Max. medium temperature Tmax: 30 °C
• Number of pump steps: 21

Engine Data

• Mains connection: 3~400 V, 50 Hz
• Motor rated power P2: 3 kW
• Rated speed n: 2830 1/min
• Rated current IN: 7.3 A
• Starting current I: 34.5 A
• Capacity factor: 0.79
• Max. breaking frequency t: 20 1/h
• Motor diameter DM: 97 mm

Cable

• Length of connection cable: 2.5 m
• Cable cross-section: 4G1.5 mm²

Material

• Pump housing: stainless steel
• Impeller: PPE
• Shaft: stainless steel
• Material motor: stainless steel

Installation Dimensions

• Pipe connection on the pressure side: Rp 2

Measure

• H: 1345mm
• H1: 865mm