Etaprime B

Summary

Product identification

The KSB Etaprime B is a self-priming volute casing pump in a close-coupled design.

• Design:
  • Self-priming, single-stage, single-suction volute casing pump.
  • Close-coupled design with pump and motor connected by a stub shaft.
  • Horizontal installation.
  • Back pull-out design (from size 40-40-140) allows dismantling without removing the pump casing from the piping.
• Pump Casing: Radially split volute casing, with integrally cast pump feet (from pump size 40-40-140).
• Impeller Type: Open multi-vane impeller.
• Product Benefits:
  • Maintenance-free mechanical seal for operating reliability.
  • Good suction performance, self-priming up to 9 m suction lift, suitable for applications with relatively poor inlet conditions (low or negative inlet pressure) and for handling fluids with entrained gas.
  • Optimised hydraulic components for high efficiency and reduced energy consumption.
• Certifications: Certified quality management to ISO 9001.

Operating limits

• Flow Rate (Q):
  • 50 Hz: ≤ 130 m³/h (≤ 36 l/s)
  • 60 Hz: ≤ 150 m³/h (≤ 42 l/s)
• Head (H):
  • 50 Hz: ≤ 70 m
  • 60 Hz: ≤ 100 m
• Fluid Temperature (T): ≥ -30 °C to ≤ +90 °C
• Operating Pressure (p): ≤ 10 bar
• Geodetic Head (Hgeo): ≤ 9 m
• Maximum Discharge-Side Operating Pressure: 10.0 bar (sum of inlet pressure and shut-off head must not exceed this value).
• Test Pressure: 15.0 bar (casing components are checked for leakage by internal pressure tests with water).
• 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.
• Priming Time: Priming times vary significantly based on pump size, speed (n = 2900 rpm, 1450 rpm, 3500 rpm, 1750 rpm), and static suction lift (H1geo from 1 m to 8 m). See the official PDF for exact tabulated values.
• Solids and Particle Handling:
  • Solids Content: Up to 3 %
  • Sand Content: Up to 4 g/l
  • Particle Size:
    • Single mechanical seal: Up to 3 mm (specific sizes allow up to 6 mm).
    • Double mechanical seal (Plan 54 as a minimum): Up to 5 mm to 12 mm depending on pump size. Barrier fluid system not included in standard scope of supply.

Feed water

The Etaprime B pump is suitable for handling a wide range of fluids, including:

• Drinking water
• Swimming pool water (0.4 to 1.4 mg/l free chlorine, max. 0.6 mg/l combined chlorine, pH 6.9 to 7.7, water hardness 10 to 30 °dH, max. salt content 7 g/l)
• Fire-fighting water
• Seawater (≤ 25 °C)
• River water
• Lake water
• Groundwater
• Brackish water (≤ 25 °C)
• Condensate (≤ 90 °C, treatment to VdTÜV 1466; O₂ ≤ 0.02 mg/l)
• Brine
• Oil
• Service water
• Cleaning agents (e.g., Lyes for bottle rinsers ≤ 90 °C, EPDM only if oil-free)
• Cooling water (without antifreeze, ≤ 60 °C; with antifreeze pH ≥ 7.5, ≥ -30 to ≤ 90 °C, antifreeze on ethylene glycol basis with inhibitors, 20 % to 50 % content, p ≤ 10 bar)
• Industrial waste water (analysis required)
• Ammonia water (ammonia solution), percentage ≤ 10 % (≤ 40 °C)
• Slightly contaminated water (≤ 60 °C)
• Surface water (analysis required, ≤ 40 °C)
• Pure water (No ultra-pure water! Conductivity at 25 °C: ≤ 800 µS/cm, ≤ 60 °C)
• Raw water (≤ 60 °C)
• Dam water (If solids are contained, contact KSB, ≤ 60 °C)
• Partly desalinated water (≤ 90 °C)
• Fully desalinated water (Requirements for ultra-pure water cannot be met, ≤ 90 °C)
• Fully desalinated water as boiler feed water (≤ 90 °C)
• Cooling brine; inorganic, pH > 7.5, inhibited (≥ -30 to ≤ 25 °C)
• Water with antifreeze, pH > 7.5 (≥ -30 to ≤ 90 °C)
• Drilling/grinding emulsion (≤ 60 °C)
• Oil-water emulsion (≤ 60 °C)
• Acids (e.g., Acetic acid, percentage ≤ 10 %, ≤ 60 °C; Alum, potassium aluminium sulphate up to 3 %, ≤ 80 °C)

General criteria for water analysis results: pH ≥ 7; chloride content (Cl) ≤ 250 mg/kg; Chlorine (Cl₂) ≤ 0.6 mg/kg.

Electrical

• Drive: KSB IEC frame standardised IE3 motor (from 0.75 kW).
• Type of Construction:
  • B34 ≤ 1.1 kW
  • V1 1.1 to 4 kW
  • V15 > 4 kW
• Voltage:
  • 230/400 V up to 2.2 kW
  • 400/690 V from 3 kW
• Enclosure: IP55
• Thermal Class: F
• Protection: 3 PTC thermistors.
• Motor Sizes and Currents: A range of motor sizes from 0.55 kW to 30.0 kW (50 Hz) or 0.6 kW to 34.5 kW (60 Hz) are available. Currents indicated are for orientation only; refer to the motor name plate for exact values.

Mechanical / hydraulic

• Shaft Seal:
  • Shaft equipped with replaceable shaft protecting sleeve.
  • Single mechanical seals and double mechanical seals to EN 12756.
  • Available types: Single mechanical seal (internal circulation), Double mechanical seal (back-to-back arrangement), Double mechanical seal (tandem arrangement with internal circulation).
  • Seal codes include Q1Q1VGG, AQ1VGG, U3U3VGG, Q1Q1X4GG, BQ1EGG, Q12Q1M1GG.
• Materials (Default A1 variant unless specified):
  • Volute Casing: Grey cast iron EN-GJL-250 (G, GC variants), Stainless steel 1.4408 (C variant).
  • Casing Cover: Grey cast iron EN-GJL-250 (G, GC variants), Stainless steel 1.4408 (C variant).
  • Shaft (Shaft units 25 and 35): Tempered steel C45+N (G, GC variants), Stainless steel 1.4571 (optional G, GC; default C).
  • Shaft (Shaft unit 17): Stainless steel 1.4571 (all variants).
  • Impeller: Grey cast iron EN-GJL-250 (G variant), Stainless steel 1.4408 (GC, C variants).
  • Drive Lantern (Shaft units 25 and 35): Grey cast iron EN-GJL-250 (all variants).
  • Drive Lantern (Shaft unit 17): Grey cast iron EN-GJL-250 (G, GC variants), Stainless steel 1.4408 (C variant).
  • O-ring: EPDM 80 peroxide (all variants); FKM 80 available on request.
  • Shaft Sleeve (not for shaft unit 17): Stainless steel 1.4571 (all variants).
• Connections:
  • Fluid Drain (6B): G 1/8 to G 1/2 (threaded connection to ISO 228/1).
  • Fluid Priming and Venting (6D): G 3/8 to G 1/2 (threaded connection to ISO 228/1).
  • Flange Dimensions:
    • Shaft unit 17: Standard connection pipe thread to ISO 7-1 (Rp 1 to Rp 1 1/2). Optional connection to ASME B1.20.1 (NPT 1 to NPT 1 1/2).
    • Shaft units 25, 35: Standard flanged connections to EN 1092-1 (material variant C) or EN 1092-2 (material variant G/GC) for DN 40 to DN 100. Optional flanged connections to ASME B16.1 (material variant G/GC) or ASME B16.5 (material variant C) for NPS 1 1/2 to NPS 4.
• Dimensions: Detailed dimensions (e.g., a, b1, b2, h1, l1, w) in [mm] are provided for various pump sizes and motor powers. See the official PDF for exact tabulated values.

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Disclaimer: This summary is based on 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)

Lenntech datasheet mirror