SD

Summary

Product Identification

Calpeda SDP series submersible borehole pumps are designed for installation in 4” (DN 100 mm) and 6” (DN 150 mm) wells.

Models include:

• 4SDP series (e.g., 4SDP 1, 4SDP 2, 4SDP 3, 4SDP 4, 4SDP 6, 4SDP 8, 4SDP 16)
• 6SDP series (e.g., 6SDP 20, 6SDP 25, 6SDP 30, 6SDP 35, 6SDP 40, 6SDP 50, 6SDP 52)

Designation Example:

• 4SDPM 6/14: 4 = Ø of the well in inches; SDP = Series; M = Single-phase (without three-phase indication); 6 = Stage identification; 14 = Number of impellers.
• 6SDP 52/3A 4SM: 4SM = Motor flange coupling.

Applications

• Water supply systems
• Civil and industrial applications
• Fire fighting applications
• Irrigation

Operating Limits

Pump:

• Liquid temperature:
  • Up to 35 °C for 4” motors
  • Up to 30 °C for 6” motors
• Maximum amount of sand in the water:
  • 150 g/m³ for 4SDP
  • 300 g/m³ for 6SDP
  • 300 g/m³ for high percentage of solids and sand
• Continuous duty

Motor (Cooling and Starting):

• 4CS-R motors (all):
  • Max. Liquid temperature: 35 °C
  • Cooling minimum flow velocity: 0.1 m/s
  • Max n° of starting per hour: 30
• 6CS-R motors (4÷15 kW):
  • Max. Liquid temperature: 40 °C
  • Cooling minimum flow velocity: 0.5 m/s
  • Max n° of starting per hour: 20
• 6CS-R motors (18.5÷30 kW):
  • Max. Liquid temperature: 35 °C
  • Cooling minimum flow velocity: 0.5 m/s
  • Max n° of starting per hour: 20
• 6CS-R motors (37 kW):
  • Max. Liquid temperature: 30 °C
  • Cooling minimum flow velocity: 0.5 m/s
  • Max n° of starting per hour: 20
• Continuous duty.

Electrical

• Motor Type: 2-pole induction motor, 50 Hz (n ≈ 2900 rpm).
• Motor Sizing: According to NEMA Standards.
• Standard Voltages:
  • Single-phase: 230 V up to 2.2 kW for 4” motors.
  • Three-phase: 230 V; 400 V, for 4” motors.
  • Three-phase: 400 V; 400/690 V, for 6” motors.
• Voltage Tolerance: ± 10%.
• Starting Requirements (for rated motor powers ≥ 7.5 kW): Star/delta, soft starter, stator impedance, or autotransformer.
• Insulation Class: F for 4” motors.
• Protection: IP 68.
• Frequency Converter: Motor suitable for operation with frequency converter (with suitable filter dv/dt).

Mechanical / Hydraulic

• Well Diameters: For 4” (DN 100 mm) and 6” (DN 150 mm) wells.
• Connection: Screwed connection ISO 228.
• Delivery Casing: Built-in non-return valve.
• Performance Data: Extensive tables detail flow rates (Q in m³/h, l/min) and total head (H in m) for various three-phase and single-phase models. See the official PDF for exact tabulated values.
• Dimensions and Weights: Detailed tables provide dimensions (mm) and weights (kg) for all models. See the official PDF for exact tabulated values.

Construction Materials

* Trademark of General Electric

Compliance

The electropumps 4SDP 1, 2, 3, 6 series comply with the European Regulation no. 547/2012.

Special Features on Request

• Other voltages
• Frequency 60 Hz (as per 60 Hz data sheet)
• High temperatures
• Encapsulated motor FK series

---

Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF datasheet. For contractual purposes, all data must be verified against the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror