KWP

Summary

Product identification

• Product Name: KWP
• Type: Dry-installed Volute Casing Pump, Centrifugal Pump with Shaft Seal
• Design:
  • Volute casing with integrally cast pump feet
  • Radially split volute casing
  • Back pull-out design
  • Single-stage
  • Single-suction
  • Horizontal installation
• Impeller Types:
  • F (Vortex impeller): Suitable for fluids containing coarse solids and stringy material, as well as fluids with entrapped gas and entrapped air.
  • K (Closed multi-channel impeller): Suitable for contaminated, solids-laden fluids not containing stringy material and containing no or very little entrapped gas.
  • O (Open multi-vane impeller): Suitable for uncontaminated or slightly contaminated fluids containing very little entrapped gas, as well as fluids liable to form deposits and bunch.
• Designation Key (Example: KWP F 125-100-0250 GNNG 10 P4 X 3NH 554):
  • KWP: Pump type
  • F: Impeller (F=Vortex, K=Closed multi-channel, O=Open multi-vane)
  • 125-100-0250: Size (Nominal suction nozzle diameter [mm], Nominal discharge nozzle diameter [mm], Nominal impeller diameter [mm])
  • G: Pump casing material (e.g., G=Grey cast iron GJL-250)
  • N: Impeller material (e.g., N=ERN)
  • N: Wear plate/wear ring material (e.g., N=ERN)
  • G: Discharge cover material (e.g., G=Grey cast iron GJL-250)
  • 10: Design version
  • P4: Shaft seal operating mode (e.g., P4=Gland packing)
  • X: Design (X=Non-standard)
  • 3NH: Installation type (e.g., 3NH=Pump, motor, baseplate, spacer-type coupling)
  • 55: Motor rating PN [kW]
  • 4: Number of motor poles

Operating limits

• Flow rate (Q): ≤ 15000 m³/h
• Head (H): ≤ 100 m
• Operating temperature (T): ≥ -40 °C to ≤ +140 °C
• Operating pressure (p): ≤ 10 bar
• Standard Pressure Class:
  • DN 40–DN 150: PN10/PN16
  • DN 200–DN 900: PN10
• Higher values for flow rate, head, operating temperature, and operating pressure are available on request.

Feed water

• Contaminated fluids
• Fluids containing solids
• Pre-treated waste water
• All types of slurries without stringy material
• Industrial and municipal waste water
• Pulps up to 5% bone dry with a maximum density of 2000 kg/m³, max. permissible viscosity 500 cSt

Mechanical / hydraulic

• Shaft Seal Options:
  • Gland packing (uncooled or cooled)
  • Single mechanical seal
  • Double mechanical seal (in tandem arrangement, with quench, or with barrier fluid)
  • Shaft equipped with replaceable shaft protecting sleeve in the shaft seal area.
• Bearings:
  • Oil-lubricated rolling element bearings
  • Back pull-out design with axially adjustable pump rotor to adjust the clearance between impeller and wear plate.
• Connections (Flanges):
  • Discharge Flange:
    • DN 40 - DN 600: with throughholes in accordance with EN 1092-2 as per pressure class.
    • From DN 600 for KWP KC: with tapped throughholes in accordance with EN 1092.
  • Suction Flange:
    • DN 40 - DN 350: with tapped pocket holes in accordance with EN 1092-2 as per pressure class.
    • From DN 400 plus 350-350-500: with throughholes in accordance with EN 1092-2 as per pressure class.
  • Flanges in accordance with ASME B 16.5 are available on request.
• Materials (Examples):
  • Pump Casing: Noridur 1.4593, Grey cast iron GJL–250, Norihard NH 15 3, Nodular cast iron GJS-400-18-LT/CeramikPolySiC, Noriclor 1.4573.
  • Impeller: Noridur 1.4593, CeramikPolySiC, Noricrom 1.4475, Noridur DAS 1.4593, ERN, Norihard NH 15 3, Noriclor 1.4573.
  • Shaft: C45+N.
  • Bearing Bracket: Grey cast iron GJL–250.
  • Shaft Protecting Sleeve (gland packing): 1.4539, 1.4122 HV500+80, 2.4610.
  • Shaft Protecting Sleeve (mechanical seal): 1.4539, 2.4610.
  • Note: A comprehensive list of material variants for various components is available in the official PDF.
• Hydraulic System Data: Detailed technical data for the hydraulic system, including free passage, number of vanes, and impeller diameters (max./min.) for various pump sizes and impeller types (K, O, F), is tabulated in the official PDF. See the official PDF for exact tabulated values.
• Bearing Bracket Data: Detailed technical data for bearing brackets (P03ax to P20sx), including shaft diameter, shaft protecting sleeve dimensions, gland packing dimensions, and bearing types, is tabulated in the official PDF. See the official PDF for exact tabulated values.
• Dimensions: Detailed dimensions for pumps with various bearing brackets (P03ax to P20sx), including shaft end and pump feet dimensions, are tabulated in the official PDF. See the official PDF for exact tabulated values.

Electrical

• Drive: Electric motor connected to the pump via a coupling or belt drive.
• Automation Options:
  • Hyatronic N
  • PumpDrive
  • PumpMeter

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: The operating point of each pump is guaranteed to ISO 9906/3B.
• Optional Tests (at extra charge): Performance test to ISO 9906, NPSH test.
• Other inspections/tests on request.
• Warranties are given within the scope of the valid terms and conditions of sale and delivery.

Product Benefits

• Easy maintenance due to back pull-out design.
• Safe design: all pressure-retaining components cast with extra corrosion/wear allowance.
• Wear-resistant standard pump in diagonal gap design with suction-side wear plate.
• High levels of efficiency with channel-type impeller, impeller with front vanes and diagonal gap; back vanes reduce axial thrust.
• Dry shaft: no special materials required.
• Reinforced, adjustable bearing assembly design.
• Optimum circulation around the mechanical seal, venting and drainage of the shaft seal chamber due to the mechanical seal fitted in a conical shaft seal chamber.

---

Disclaimer: This summary is based solely on the provided text extract. It may not include all figures, footnotes, or the latest revisions present in 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