Etaprime L

Summary

Product identification

The KSB Etaprime L is a self-priming volute casing pump.

Key design features include:

• Design: Volute casing pump, back pull-out design (from size 40-40-140), horizontal installation, single-stage, single-suction.
• Pump Casing: Radially split volute casing, with integrally cast pump feet (from pump size 40-40-140).
• Impeller Type: Open multi-vane impeller.
• Scope of Supply: Depending on the model, the scope of supply includes the pump, electric motor, flexible coupling (with or without spacer), coupling guard, and channel section steel or folded steel plate. A cast baseplate to ISO 3661 is optional.

Operating limits

• Flow rate (Q):
  • 50 Hz: ≤ 180 m³/h (≤ 50 l/s)
  • 60 Hz: ≤ 150 m³/h (≤ 41 l/s)
• Head (H):
  • 50 Hz: ≤ 85 m
  • 60 Hz: ≤ 105 m
• Fluid temperature (T): ≥ -30 °C to ≤ +90 °C
• Operating pressure (p): ≤ 10 bar
• Geodetic suction lift (Hgeo): ≤ 9 m
• Maximum discharge-side operating pressure: 10.0 bar (The sum of inlet pressure and shut-off head must not exceed this value.)
• Test pressure: 15.0 bar
• Priming Time: Detailed priming times in seconds are available in the official PDF, depending on pump size, shaft unit, speed (n = 2900 rpm, 1450 rpm, 3500 rpm, 1750 rpm), and static suction lift (H1geo) from 1 m to 8 m.
• Self-priming limitations: The pump will not be self-priming when handling gaseous fluids, fluids which tend to froth, or water with a temperature T > 60 °C. In such cases, a check valve must be installed in the suction line.

Feed water

The Etaprime L pump is suitable for handling a wide range of fluids:

• Drinking water
• Swimming pool water (0.4 to 1.4 mg/l free chlorine, combined chlorine ≤ 0.6 mg/l, pH 6.9 to 7.7, water hardness 10 to 30 °dH, salt content ≤ 7 g/l)
• Fire-fighting water
• Seawater
• River water
• Lake water
• Groundwater
• Brackish water
• Condensate
• Brine
• Oil
• Service water
• Cleaning agents
• Cooling water

Specific fluid compatibility, including temperature limits and recommended material variants/shaft seals, is detailed in the official PDF. Examples include:

• Ammonia water (ammonia solution), percentage ≤ 10 %: ≤ 40 °C, Grey cast iron / grey cast iron casing/impeller, Q1Q1X4GG mechanical seal. Requires a tandem seal (Q1Q1EGG) and suitable quench liquid.
• Pure water (not ultra-pure water): ≤ 60 °C, Grey cast iron / grey cast iron casing/impeller, Q1Q1X4GG mechanical seal. Conductivity at 25 °C: ≤ 800 μS/cm.
• Brackish water/Seawater: ≤ 25 °C, CrNiMo cast steel / CrNiMo cast steel casing/impeller, U3U3VGG mechanical seal.

Solids and Particle Handling:

• Solids content: Up to 3 % (single mechanical seal).
• Sand content: Up to 4 g/l (single mechanical seal).
• Particle size:
  • Single mechanical seal: Up to 6 mm (e.g., for size 025-025-100), up to 3 mm (e.g., for size 040-040-140).
  • Double mechanical seal (Plan 54 as a minimum): Up to 12 mm (e.g., for size 080-080-170), up to 5 mm (e.g., for size 040-040-140).
  • See the official PDF for exact tabulated values for all sizes.

Electrical

• Drive: KSB IEC frame standardised IE3 motor (from 0.75 kW).
• Voltage (50 Hz): 230/400 V up to 2.2 kW and 400/690 V from 3 kW.
• Rated Voltage (60 Hz): 3~ 440 - 480 V ≥ 2.41 hp (1.80 kW).
• Type of Construction: IM B3.
• Enclosure: IP55.
• Thermal Class: F with temperature sensor, 3 PTC thermistors.
• Duty Type: Continuous duty S1.
• Motor Ratings (PN): Available from 0.37 kW up to 37.00 kW, depending on pump size and speed.
• Explosion Protection: Available with explosion-proof motor (indicated by "ex" in the designation).

Mechanical / hydraulic

• Shaft Seal:
  • Shaft equipped with replaceable shaft protecting sleeve in the shaft seal area.
  • Single mechanical seals and double mechanical seals to EN 12756.
  • Available types: Single mechanical seal (I), Double mechanical seal in back-to-back arrangement (D), Double mechanical seal in tandem arrangement with internal circulation (T).
  • For sizes 025-025-100, 032-032-120, and 040-040-110 (Shaft Unit 17), only a single mechanical seal is suitable for the application.
• Bearings: Various application-oriented bearings are used. Standard bearing assemblies are available with grease or oil lubrication. See the official PDF for specific rolling element bearing types (e.g., 3203 C3, 6203 2RS, 6305 2Z C3, 6307 2Z C3, 6305 C3, 6307 C3) for different shaft units (WE 17, WE 25, WE 35).
• Materials:
  • Volute casing / Casing cover: Grey cast iron EN-GJL-250 (default), Stainless steel 1.4408 (optional).
  • Shaft:
    • Shaft units 25 and 35: Tempered steel C45+N (default), Duplex stainless steel 1.4462 (optional).
    • Shaft unit 17: Stainless steel 1.4571 (default).
  • Impeller: Grey cast iron EN-GJL-250 (default), Stainless steel 1.4408 (optional).
  • Bearing bracket / Bearing housing: Grey cast iron EN-GJL-250 (default), Stainless steel 1.4408 (optional for bearing housing SU 17).
  • O-ring: EPDM 80 peroxide (default), FKM 80 (on request).
  • Shaft sleeve (not for shaft unit 17): Stainless steel 1.4571 (default).
• Flange Designs:
  • Threaded connections (Shaft Unit 17):
    • Standard: Connection pipe thread to ISO 7-1 (Rp 1 to Rp 1 1/2) at PN10.
    • Optional: Connection pipe thread to ASME B1.20.1 (NPT 1 to NPT 1 1/2) at PN10.
  • Flanged connections (Shaft Units 25, 35):
    • Standard: Drilled to EN 1092-2 (material variant G/GC) or EN 1092-1 (material variant C) at PN16.
    • Optional: Drilled to ASME B16.1 (material variant G/GC) or ASME B16.5 (material variant C) at CL125/CL150.
    • Flange dimensions (DN 40 to DN 125, NPS 1 1/2 to NPS 5) are detailed in the official PDF.
• Connections (Pump):
  • Fluid drain (6B): G 1/8 or G 3/8 or G 1/2 (ISO 228/1).
  • Fluid priming and venting (6D): G 3/8 or G 1/2 (ISO 228/1).
• Dimensions: Detailed pump and pump set dimensions (e.g., a, b1, b2, f, h1, h2, h3, w, l1, l2, l3) in millimeters are provided in extensive tables and figures within the official PDF.

Product benefits

• Maintenance-free mechanical seal ensures operating reliability.
• Easy to dismantle due to back pull-out design; no need to remove the pump casing from the piping.
• Good suction performance, self-priming up to 9 m suction lift, also suitable for applications with relatively poor inlet conditions (i.e. low or negative inlet pressure) and for handling fluids with entrained gas.
• Optimised hydraulic components for high efficiency help reduce energy consumption.

Certifications

• Certified quality management to ISO 9001 (effective in all countries).

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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. For contractual data and full product specifications, always refer to the official OEM PDF revision used on your project.

Official datasheet (PDF)

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