Wilo TWI, 4.01-18-DM-D, Borehole Pump

Description

Fully submersible, multi-stage borehole pump for pumping domestic and domestic hot water (ACS approval) with radial or semi-axial impellers in articulated construction for vertical and horizontal installation, with integrated non-return valve. Corrosion-free single-phase or three-phase motor for direct start with water-glycol filling. Hermetically encapsulated with lacquer-insulated winding, resin-coated and self-lubricating layer. The motor is cooled by the medium. The unit must always be used submerged. The limit values for max. medium temperature and minimum flow rate must be observed. In case of vertical installation, cooling jacket may or may not be used. For horizontal installation, cooling jackets must always be used.

Hydraulic Data

• Minimum Effectiveness Index (MEI): ≥0.4
• Maximum operating pressure PN: 40 bar
• Maximum sand content: 50 g/m³
• Maximum immersion depth: 350 m
• Flow max. Qmax: 1.8 m³/h
• Optimal flow Qopt: 0.9 m³/h
• Call height max. Hmax: 102.0 m
• Optimum call height Hopt: 72.56 m
• Minimum medium temperature Tmin: 3 °C
• Maximum media temperature Tmax: 30 °C
• Number of pump stages: 18

Engine Data

• Mains connection: 3~400 V, 50 Hz
• Motor rated power P2: 0.55 kW
• Rated speed n: 2870 1/min
• Rated current IN: 1.58 A
• Starting current I: 7.4 A
• Capacity factor: 0.74
• Max. breaking frequency t: 20 1/h
• Motor diameter DM: 95 mm

Cable

• Length of connection cable: 1.5 m
• Cable cross section: 3x1.5+1G1.5 mm²

Material

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

Installation Dimensions

• Pipe connection on the pressure side: Rp 1¼

Measure

• Length: 796 mm
• Height: 98 mm
• Width: 95 mm