SDS

Summary

Product Identification

Calpeda SDS series submersible borehole pumps are designed for installation in 6”, 8”, and 10” wells.

• Well Diameters:
  • 6” (DN 150 mm)
  • 8” (DN 200 mm)
  • 10” (DN 250 mm)
• Construction: Stages in cast iron or, on request, in bronze.
• Impellers: Mixed flow type.
• Connections:
  • 6SDS: Screwed connection ISO 228
  • 8SDS and 10SDS: Flange with counter-flange for welding
• Features: Delivery casing includes a built-in non-return valve.
• Applications:
  • Water supply
  • Civil and industrial applications
  • Fire fighting applications
  • Irrigation
• Designation Example: B 10 SDS 190 / 6 indicates Bronze construction, 10-inch well diameter, SDS series, stage identification 190, and 6 stages.

Operating Limits

• Liquid Temperature (Pump): Up to 25 °C
• Max. Sand Quantity:
  • Standard: 150 g/m³
  • High percentage of solids and sand applications: 300 g/m³
• Duty: Continuous duty

Motor Operating Conditions

• Motor Liquid Temperature:
  • 6CS-R (4÷15 kW): 30 °C
  • 6CS-R (18.5 kW): 25 °C
  • 6CS-R (22÷30 kW): 25 °C
  • 6CS-R (37 kW): 40 °C
  • 6CS-R (45 kW): 40 °C
  • 8CS-R (30÷45 kW): 25 °C
  • 8CS-R (51÷75 kW): 25 °C
  • 8CS-R (92 kW): 25 °C
  • 10CS (all types): 25 °C
• Minimum Flow Velocity:
  • 6CS-R (4÷11 kW): 0.1 m/s
  • 6CS-R (13÷30 kW): 0.2 m/s
  • 6CS-R (37 kW): 0.1 m/s
  • 6CS-R (45 kW): 0.3 m/s
  • 8CS-R (30÷75 kW): 0.3 m/s
  • 10CS (all types): 0.50 m/s
• Max. Starts per Hour:
  • 6CS-R (4÷18.5 kW): 15
  • 6CS-R (22÷37 kW): 13
  • 6CS-R (45 kW): 6
  • 8CS-R (30÷45 kW): 10
  • 8CS-R (51÷75 kW): 8
  • 8CS-R (92 kW): 6
  • 10CS (all types): 10

Electrical

• Motor Type: Rewindable motor CS, CS-R series, 2-pole induction motor, 50 Hz (n ≈ 2900 rpm).
• Winding: Water wetted winding in rewindable execution.
• Standards: Sized for connection to NEMA Standards.
• Standard Voltages:
  • Three-phase 400 V
  • Three-phase 400/690 V
• Voltage Tolerance: +6% / -10%
• Starting Requirements: For rated motor powers equal to or higher than 7.5kW, one of the following starting types is necessary: star/delta, soft starter, stator impedance, or autotransformer.
• Insulation Class:
  • 6-8” motors: Class E
  • 10” motors: PVC coated wire
• Frequency Converter: Motor is suitable for operation with a frequency converter.
• Protection: IP 68
• Special Features on Request: Other voltages, 60 Hz frequency, Encapsulated motor FK series.

Mechanical / Hydraulic

Materials of Construction

• Stage casing, Diffuser, Suction lantern, Delivery casing: Cast iron (GJL 200 EN 1561) or Bronze (G-Cu Sn 10 EN 1982) on request.
• Impeller: Cast iron (GJL 200 EN 1561) or Bronze (G-Cu Sn 10 EN 1982) on request.
• Wear ring: Rubber (Bronze for 10SDS 190-280).
• Shaft:
  • 6SDS and 8SDS: Steel AISI F51 duplex
  • 10SDS: Cr-Ni-Mo steel AISI 316
• Shaft sleeve: Brass with chromate surface treatment (only for 10SDS).
• Bearing bush: Rubber (Bronze for 8” motor).
• Strainer, Screws: Cr-Ni steel AISI 304.
• Motor External Frame: AISI 304 (AISI 316Ti for 10”) for standard CS/CS-R; Cr-Ni-Mo steel AISI 316 Ti for I-CS-R/I-CS AISI 316 models.
• Motor Flange: Cast iron GJL 200 EN 1561 for standard CS/CS-R; Cr-Ni-Mo steel AISI 316 for I-CS-R/I-CS AISI 316 models.
• Motor Shaft End: Steel AISI 431 for standard CS/CS-R; AISI 316 (AISI 630 from 30 to 93kW) for I-CS-R/I-CS AISI 316 models (AISI 329 for 10”, AISI 429 for 10”).
• Thrust Bearing: Oscillating pads.
• Bushings: Graphite (Bronze for 8” motor).

Performance and Dimensions

Detailed characteristic curves, performance tables (P2 rated motor power output, total head H), and dimensions/weights for various 6SDS, 8SDS, and 10SDS models are available in the official PDF. Tolerances are according to UNI EN ISO 9906:2012.

Cables Connection Kit

A kit is available for waterproofing electrical cable connections submerged in water.

• Components:
  • 4 connectors
  • 4 shrink-sheaths for protection of individual wires
  • 1 shrink-sheath for protection of the 4-pole wire
• Functionality: The sheath shrinks with heating (flame or drier), causing resin to exit and grant connection waterproofing.

Installation Examples

The document provides diagrams illustrating typical submersible pump installations, including components such as pump support systems, electric control boards, circuit breakers, level probes, pressure gauges, check valves, throttle gate valves, pressure switches, pressure tanks, and storage tanks.

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Disclaimer: This summary is based on the extracted text and may not include all figures, footnotes, or the latest revisions from the complete OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

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