KWP-Bloc

Summary

Product identification

The KWP-Bloc is a dry-installed volute casing pump from KSB.

Designation Key (Example: KWP K 125-100-0250 GDNG 10)

• KWP: Type series
• K: Impeller type (K: Channel impeller; O: Open multi-channel impeller; F: Free-flow impeller)
• 125: Nominal suction nozzle diameter [mm]
• 100: Nominal discharge nozzle diameter [mm]
• 0250: Nominal impeller diameter [mm]
• G: Casing material (e.g., EN-GJL-250)
• D: Impeller material (e.g., Noridur 1.4593)
• N: Wear plate material (e.g., ERN)
• G: Discharge cover material (e.g., EN-GJL-250)
• 10: Design version
• Further codes specify shaft seal operating mode, standard, type of installation, motor rating, and number of poles.

Operating limits

• Flow rate Q: ≤ 325 m³/h (≤ 90 l/s)
• Head H: ≤ 100 m
• Operating temperature T:
  • GNNG: -10 to +100 °C
  • GDNG: -10 to +100 °C
  • DDDD: -20 to +100 °C
• Operating pressure p: ≤ 10 bar
• Test pressure: 15 bar (for all material variants)
• Density ρ: ≤ 1.1 kg/dm³

Feed water

The KWP-Bloc pump is suitable for handling:

• Contaminated fluids
• Fluids containing solids
• Pre-treated waste water
• Industrial and municipal waste water
• All types of slurries without stringy material

Impeller Types and Suitable Fluids:

• Closed multi-channel impeller (K): Contaminated, solids-laden, non-gaseous fluids without stringy material.
• Open multi-vane impeller (O): Uncontaminated or slightly contaminated fluids with little entrapped gas, as well as fluids liable to form deposits and bunch.
• Free-flow impeller (F): Fluids containing solids and stringy material, as well as fluids with entrapped air or entrapped gas.

Electrical

• Motor rating: Available from 1.1 kW up to 22.0 kW.
• Number of motor poles: 2, 4, or 6 poles.
• Motor types: Various motor types (e.g., 90S, 90L, 100L, 112M, 132S, 132M, 160M, 160L, 180M, 180L, 200L) are available depending on pump size and desired performance. See the official PDF for exact tabulated values.
• Standard motor construction: V1 for motors < 5.5 kW; V15 for motors ≥ 5.5 kW.
• Automation options: PumpDrive, PumpMeter.

Mechanical / hydraulic

Design Details:

• Volute casing pump
• Radially split volute casing
• Close-coupled design
• Pump casing fitted with a wear plate
• Single-stage, single-entry
• Back pull-out design for easy dismantling without removing the pump casing from piping.

Installation Types:

• Horizontal installation
• Vertical installation

Shaft Seal:

• Uncooled mechanical seal with/without oil reservoir.
  • Pump sets for vertical installation are fitted with an oil reservoir.
  • For horizontal installation, an oil reservoir can be fitted as an option.
• Mechanical seal types:
  • KSB 4 KBL (single, balanced)
  • Burgmann MG1 - G6 (single, unbalanced)
  • John Crane 2100 (single, unbalanced)
• Material combinations (to EN 12756): U1U1VGG1, Q1Q1VGG1, Q1Q1VGG, Q1Q1EGG, Q5Q5VGG, Q5Q5EGG.

Bearings:

• Grease-packed deep groove ball bearings for both pump and motor.
• Motor bearing types:
  • 6012 C3 2RS (for 90S, 90L, 100L, 112M motors)
  • 6312 C3 2RS (for 132S, 132M, 160M, 160L, 180M, 180L motors)

Connections:

• Suction flange: Blind holes to DIN 2501, PN 10/16 with tapped blind holes of 1.25 d for hexagon head bolts.
• Discharge flange: Clearance holes to EN 1092-2, PN 16/21/B.
• Pump connections (threaded): Vary by pump size and function (e.g., pressure gauge, casing drain, vent, oil drain/level gauge, oil dip stick/vent). See the official PDF for exact tabulated values.

Materials (depending on material variant DDDD, GDNG, GNNG):

• Pump casing: Noridur 1.4593, EN-GJL-250
• Wear plate, suction side: Noridur 1.4593, ERN
• Intermediate lantern: EN-GJL-250
• Discharge cover: Noridur 1.4593, EN-GJL-250
• Shaft: 1.4462, 1.4021+QT700
• Impeller: Noridur 1.4593, ERN
• Intermediate ring: EN-GJL-250 (variant DDDD only)
• Shaft protecting sleeve: 1.4539
• Impeller screw: 1.4539, C35E+N

Technical Data (size-dependent):

• Impeller diameter, free passage, shaft diameter, shaft protecting sleeve diameter, bearing diameter, and pump weight (without motor, mounting plate, or foundation rails) are detailed in the official PDF. See the official PDF for exact tabulated values.

Dimensions:

• Pump set dimensions and motor dimensions are provided in detailed tables and figures within the official PDF. See the official PDF for exact tabulated values.

Accessories:

• Foundation rail: Available, with dimensions and weight varying by pump size and motor. See the official PDF for exact tabulated values.
• Foundation bolts: M 16 × 200 MU, F1/18-60 Ø 18 × 160.
• Mounting plate: 25 mm high, weighs 24 kg.

Certifications

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

Acceptance tests and warranty

• Materials testing: Test report 2.2 on request.
• Final inspection: Inspection certificate 3.1 to EN 10204 on request.
• Hydraulic test: Operating point guaranteed to ISO 9906/3B.
• Optional tests (at extra charge): Performance test to ISO 9906, NPSH test.
• Other inspections/tests on request.
• Warranty: Provided within the scope of the valid terms and conditions of sale and delivery.

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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 official OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror