CPKNO

Summary

Product identification

The KSB CPKNO is a series of Standardised Chemical Pumps, specifically Centrifugal Pumps with Shaft Seal.

Design:

• Volute casing pump
• Horizontal installation
• Back pull-out design
• Single-stage
• Technical requirements to ISO 5199
• Dimensions and ratings to ISO 2858, complemented by pumps of nominal diameters DN 25 and DN 200
• Pump casing: Single or double volute (depending on pump size), radially split, with integrally cast pump feet
• Impeller type: Semi-open multi-vane impeller with back vanes to reduce axial thrust

Main applications:

• Chemical industry (aggressive / other liquids)
• Petrochemical industry (aggressive / other liquids)
• Alcohol industry
• Fossil-fuelled power stations
• Food industry / beverage industry
• Seawater desalination/reverse osmosis
• Paper industry / pulp industry
• Refinery
• Sugar industry
• Polymerising fluids
• Fluids containing a small amount of gas
• General industry

Operating limits

• Flow rate (Q): Up to 900 m³/h
• Head (H): Up to 150 m
• Fluid temperature (T): ≥ -40 °C to ≤ +400 °C
• Operating pressure (p): ≤ 25 bar

Pressure and temperature limits for the pump and ASME flanges are detailed in diagrams within the official PDF. The application limits of shaft seals depend on circumferential speed, material, and fluid handled, requiring verification against manufacturer catalogues.

Mechanical / hydraulic

Shaft seal:

• Gland packing
• Single mechanical seal / double mechanical seal
• Component seal
• Cartridge seal
• Preferred: Standardised mechanical seals to EN 12756, K design

Bearings:

• Drive-end bearing: Fixed bearing, paired angular contact ball bearings, oil lubrication. Axial movement of the rotor limited to 0.5 mm maximum.
• Pump-end bearing: Radial bearing, cylindrical roller bearing, absorbs radial loads only, oil lubrication.
• Bearing life: Minimum calculated bearing life is 25000 h. For operation at 0.7 - 1.1 Q/QBEP, bearing life is 40000 h.

Materials (overview of available options):

• Volute casing: CS, 1.4408, D, SD
• Casing cover: CS, 1.4408, D, SD
• Impeller: SS, D, SD
• Shaft: C45+N (or 1.4462 for T≤10 °C; 1.7709.QT+SR for T>250 °C)
• Bearing bracket: CI (EN-GJL-250)
• Support foot: Steel
• Seal cover: CrNiMoSt, DS, SD
• Shaft protecting sleeve (mechanical seal): CrNiMoSt, DS, SD
• Shaft protecting sleeve (gland packing): 1.4122, CrNiMoSt, DS, SD
• Impeller nut: CrNiMoSt, D, SD
• Bearing bracket lantern: CI (optional: DI / EN-GJS-400-18-LT)
• Wear plate: CS, CrNiMoSt, D, SD Material codes: CrNiMoSt (1.4408 / 1.4571), CI (EN-GJL-250), CS (GP240GH+N / P250GH), D (1.4593/ 1.4462), DS (1.4462), SD (Noriclor / 1.4573 / 1.4469.09), SS (1.4408).

Technical data (examples from table):

• Size 025-160: Bearing bracket UP02, Impeller outlet width 6 mm, Impeller inlet diameter 45 mm, Impeller diameter 169 mm, 4 vanes. Shaft diameter in seal chamber: Gland packing 28 mm, Mechanical seal 35 mm. Diameter of shaft protecting sleeve: Max 24 mm, Min 35 mm. Volute casing design E (single volute).
• Size 200-315: Bearing bracket UP05, Impeller outlet width 50 mm, Impeller inlet diameter 222 mm, Impeller diameter 320 mm, 7 vanes. Shaft diameter in seal chamber: Gland packing 65 mm, Mechanical seal 65 mm. Diameter of shaft protecting sleeve: Max 48 mm, Min 70 mm. Volute casing design E (single volute).
• See the official PDF for exact tabulated values for all sizes.

Dimensions and connections:

• Various connections are available for pressure gauges, temperature measurement, fluid drain, cooling liquid, leakage drain, barrier fluid, flushing liquid, circulation liquid, oil drain, vent plug, condensate drain, quench liquid, vibration measurement, and constant level oiler.
• Connection thread sizes vary by bearing bracket (UP02, UP03, UP04, UP05) and include G 1/4, G 3/8, G 1/2, Rp 1/2, and M8.
• Detailed pump dimensions (DN 1, DN 2, a, b, c, f, g1, g2, h1, h2, m1, m3, n1, n3, n5) and pump feet/shaft end dimensions (d1 k6 l, t, u, y, i1, i2, m2, n2, n4, s1, s2, v, w) are provided in tables. See the official PDF for exact tabulated values.

Flange design:

• Material V: EN 1092-1 PN 16, Drilled to ASME B16.5 Class 150 (DN32 flanges drilled 1 1/2 in.)
• Material D / E / O: EN 1092-1 PN 25, Drilled to ASME B16.5 Class 150 (DN32 flanges drilled 1 1/2 in.), Drilled to ASME B16.5 Class 300 (possible from 40-250 up to and including 100-400; size 200-315 requires one-off casting with pattern variant).

Electrical

• Motor rating (PN): From 0.75 kW to 132 kW (as per designation key examples).
• Drive: Surface-cooled IEC frame three-phase squirrel-cage motor.
• Optional: PumpDrive 2nd generation (PD2, PD2E Eco), PumpMeter (M).

Coating and preservation

• Coating and preservation to KSB standard.
• Special coatings available on request.

Product benefits

• Hydraulic characteristics optimized for excellent efficiency and NPSH.
• Lower investment costs by achieving duty points with smaller pump sizes.
• Lower operating costs due to reduced energy consumption, optimized spare parts concept, and hard-wearing, service-friendly design.
• Flexible use due to modular design (hydraulic system materials, sealing elements, bearing brackets, coupling, baseplate, drive).
• Gentle handling of polymerizing fluids and fluids sensitive to shear forces.
• Semi-open impeller allows use with fluids containing a small amount of gas.

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 acceptance tests (at extra charge): Performance test to ISO 9906, NPSH test.
• Other inspections/tests on request.
• Warranty: Provided within the scope of valid terms and conditions of sale and delivery.

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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