4" Well pumps

Summary

Product identification

• Product Type: Submersible Pumps and Submersible Motors
• Series: S4 4” Submersible Pumps
• Description: Multistage, centrifugal, submerged motor-driven pumps for 4” wells or larger, capable of generating a vast range of heads and flow rates.
• Applications: Employed in a wide range of lifting, distributing, and pressurising applications in civil and industrial water installations, supplying autoclaves and cisterns, fire fighting and washing systems, and irrigation systems.

Operating limits

• Liquid temperature range: From 0˚C to +40˚C
• Maximum sand content: 120 g/m³
• Motor protection level: IP 68
• Insulation class: F

Feed water

• Pumped liquid: Clean, free from solid or abrasive substances, chemically neutral, and close to the characteristics of water.

Electrical

• Single-phase models (50 Hz):
  • Voltage: 1x230 V ~
  • P2 Nominal power: Ranges from 0.37 kW (0.5 HP) to 2.2 kW (3 HP).
  • Current (In): Ranges from 3.3 A to 16 A.
  • Protection: Capacitor and manually resettable overload protection are located inside the panel.
  • Optional: The CONTROL BOX HS is available on request to increase static torque.
• Three-phase models (50 Hz):
  • Voltage: 3x400 V ~ (A 3x230 V ~ version is also stated as available).
  • P2 Nominal power: Ranges from 0.55 kW (0.75 HP) to 5.5 kW (7.5 HP).
  • Current (In): Ranges from 1.9 A to 14 A.
  • Protection: Responsibility of the user.
• General Electrical:
  • Motor type: Two-pole, water-filled, submersible TESLA electric motor.
  • Motor construction: Entirely in AISI 304 stainless steel for parts in contact with water.
  • Stator: Canned-type.
  • Special versions: Available on request with different voltages and/or frequencies.
  • Optional motor: TESLA oil-filled motor available on request.
• Active Driver Inverter System (Example Configuration):
  • System components: Submerged pump, Inverter, Non-return valve, Expansion tank (3-8 litres), Inverter power cable, Cable between inverter and pump.
  • Installation suggestion: Installation of a filter upline of the Active Driver is recommended in some plants to prevent damage to the pressure sensor inside the inverter.
  • Caution (Single-phase/Single-phase inverter AD M/M 1.1): Requires installation of a control box model electric panel, containing the starter condenser.
  • Maximum Cable Lengths (per section, for specific Active Driver models and pump types):
    • For Single-phase 1x230 V~ pumps with Active Driver M/M 1.1 (1x230 V~): 1.5 mm²: 60 mt; 2.5 mm²: 100 mt; 4 mm²: 160 mt.
    • For Three-phase 3x230 V~ pumps with Active Driver M/T 2.2 (1x230 V~): 1.5 mm²: 100 mt; 2.5 mm²: 170 mt; 4 mm²: 270 mt.
    • For Three-phase 3x400 V~ pumps with Active Driver T/T 3.0 (3x400 V~): 1.5 mm²: 160 mt; 2.5 mm²: 280 mt; 4 mm²: -
    • For Three-phase 3x400 V~ pumps with Active Driver T/T 5.5 (3x400 V~): 1.5 mm²: 130 mt; 2.5 mm²: 215 mt; 4 mm²: 350 mt.

Mechanical / hydraulic

• Discharge Connection (DNM):
  • 1 1/4" G-F for S4 A, S4 B, S4 C, S4 D series.
  • 2” G-F for S4 E, S4 F series.
• Construction Materials:
  • Base support: microcast AISI 304 stainless steel
  • Upper head (with built-in check valve): microcast AISI 304 stainless steel
  • Cable cover: AISI 304 stainless steel (X5CrNi1810 - UNI 6900/71)
  • Pump jacket: AISI 304 stainless steel (X5CrNi1810 - UNI 6900/71)
  • Shaft with coupling: AISI 304 stainless steel (X5CrNi1810- UNI 6900/71)
  • Intermediate bush: AISI 304 stainless steel (X5CrNi1810- UNI 6900/71)
  • Impeller: Technopolymer A with adjustment ring in AISI 304 stainless steel (X5CrNi1810- UNI 6900/71)
  • Diffuser: Technopolymer A
  • Diffuser body: Technopolymer A
  • Filter: Stainless steel
  • Support: Technopolymer A
  • Valve: AISI 304 stainless steel (X5CrNi1810- UNI 6900/71)
  • Impeller locking nut: Stainless steel
  • Spacer: AISI 304 stainless steel (X5CrNi1810- UNI 6900/71)
  • Intermediate shaft guide bush: Acetalic resin
  • Front adjustment ring: Anti-abrasion, synthetic material
  • Rear adjustment ring: Anti-abrasion, synthetic material
  • Top shaft bush guide: Rubber
• Features: Includes a non-return valve to facilitate maintenance.
• Weight: Varies by model, ranging from 3.2 kg to 65 kg. See the official PDF for exact tabulated values.

Disclaimer: This summary is based on the provided text extract 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)

Lenntech datasheet mirror