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Datasheet summary

RPH-RO

PDF datasheet mirror for RPH-RO (KSB Pumps). Verify with OEM before design.

Summary

Product identification

  • Product Type: Process Pump
  • Type Series: RPH-RO
  • Main applications: Pump for water desalination systems (reverse osmosis applications)
  • Designation example: RPH-RO 150-230
    • RPH: Type series
    • 150: Nominal discharge nozzle diameter [mm]
    • 230: Nominal impeller diameter [mm]
    • RO: Reverse osmosis

Operating limits

  • Flow rate (Q): Up to 2500 m³/h / 11008 gpm
  • Head (H): Up to 150 m / 492 ft
  • Operating temperature (T): 0 °C to 40 °C / 32 °F to 104 °F
  • Operating pressure (p): Up to 80 bar / 1160 psi (ASME B 16.5 Class 600)
    • Higher pressures and flange pressure ratings available on request.

Mechanical / hydraulic

  • Design Details:
    • Volute casing pump
    • Horizontal installation
    • Back pull-out design
    • Single-stage
    • Pump casing: Volute casing with integrally cast pump feet, centreline pump feet, single or double volute (depending on pump size), radially split volute casing, axial inlet nozzle, tangential discharge nozzle pointing vertically upwards (radial discharge nozzle from DN 250 / impeller diameter 500 / pump size 200-401), volute casing with casing wear ring, casing cover (with casing wear ring, as required).
    • Impeller type: Closed radial impeller, impeller with impeller wear ring on the suction side.
    • Shaft seal: KSB mechanical seal
    • Bearings: Uncooled (optional: cooled bearing bracket).
      • Drive-end bearing: Fixed bearing, paired angular contact ball bearing (triple bearing assembly), axial movement of rotor limited to 0.5 mm maximum, oil bath lubrication (optional: oil mist lubrication).
      • Pump-end bearing: Radial bearing, cylindrical roller bearing, absorbs radial loads only, oil bath lubrication (optional: oil mist lubrication).
  • Bearing Bracket Designation:
    • Example: B03
    • B: Back pull-out bearing bracket
    • 03: Size code (based on dimensions of seal chamber, shaft end and bearings)
  • Bearings Used (Rolling Element Bearings):
    • Bearing bracket B03: Pump end: NU213C3; Motor end: 3 x 7311B-MUA (Reinforced bearing assembly)
    • Bearing bracket B05: Pump end: NU316C3; Motor end: 3 x 7315B-MUA (Reinforced bearing assembly)
    • Bearing bracket B06: Pump end: NU324C3; Motor end: 3 x 7224B-MUA (Reinforced bearing assembly)
    • Bearing bracket B07: Pump end: NU324C3; Motor end: 3 x 7324B-MUA (Reinforced bearing assembly)
  • Nominal Impeller Diameters Available:
    • See the official PDF for exact tabulated values.
  • Technical Data (Selected Parameters):
    • Shaft Diameter:
      • In seal chamber: 47 mm (B03), 56 mm (B05S), 73 mm (B05L), 120 mm (B07)
      • At bearings (Pump end): 65 mm (B03), 80 mm (B05S, B05L), 120 mm (B07)
      • At coupling (Drive end): 55 mm (B03), 75 mm (B05S, B05L), 95 mm (B07)
    • Impeller Outlet Width: Ranges from 19.8 mm to 115.4 mm depending on size.
    • Impeller Inlet Diameter: Ranges from 133 mm to 337 mm depending on size.
    • Impeller Diameter: Ranges from 190 mm to 408 mm depending on size.
    • P/n value: Ranges from 0.0875 to 1.9210.
    • See the official PDF for full tabulated technical data including specific impeller dimensions and max. drive power per size and RPM.
  • Connections of Single KSB Mechanical Seal:
    • Connection Type / Description (≤ DN 50 / ≥ DN 80):
      • 1M: Pressure gauge (NPT 1/2-14 / NPT 1/2-14)
      • 3M: Pressure gauge (NPT 1/2-14 / NPT 1/2-14)
      • 5B: Vent (NPT 1/2-14 / NPT 1/2-14)
      • 6B: Fluid drain (DN15 ASME B16.5 / DN15 ASME B16.5)
      • 7B: Cooling liquid drain (NPT 1/2-14 / NPT 1/2-14)
      • 7E.1/A.1: Cooling liquid IN/OUT (NPT 1/2-14 / NPT 1/2-14)
      • 7E.2/A.2: Cooling liquid IN/OUT (NPT 1/2-14 / NPT 1/2-14)
      • 10B: Barrier fluid drain (NPT 1/2-14 / NPT 1/2-14)
      • 10E.1/A.1: Barrier fluid IN/OUT (NPT 1/2-14 / NPT 1/2-14; NPT 3/4-14 on bearing brackets B05 and B06)
      • 10E.2/A.2: Barrier fluid IN/OUT (NPT 1/2-14 / NPT 1/2-14; NPT 3/4-14 on bearing brackets B05 and B06)
      • 11E.1: Flushing liquid IN/OUT (NPT 1/2-14 / NPT 1/2-14)
      • 11E.2: Flushing liquid IN (NPT 1/2-14 / NPT 1/2-14)
      • 12E.1/A.1: Circulation liquid IN/OUT (NPT 1/2-14 / NPT 1/2-14)
      • 12E.2/A.2: Circulation liquid IN/OUT (NPT 1/2-14 / NPT 1/2-14)
      • 13B: Oil drain (NPT 1/2-14 / NPT 1/2-14)
      • 13D: Vent plug (NPT 1/2-14 / NPT 1/2-14)
      • 24B: Quench liquid drain (NPT 3/8-18 / NPT 3/8-18)
      • 24 E.1/A.1: Quench liquid IN/OUT (NPT 3/8-18 / NPT 3/8-18)
      • 24 E.2/A.2: Quench liquid IN/OUT (NPT 3/8-18 / NPT 3/8-18)
      • 27B: Buffer liquid drain (NPT 1/2-14 / NPT 1/2-14)
      • 27 E.1/A.1: Buffer liquid inlet/outlet (NPT 1/2-14 / NPT 1/2-14; NPT 3/4-14 on bearing brackets B05 and B06)
      • 638: Constant level oiler (NPT 3/8-18 / NPT 3/8-18)
  • Dimensions of Standard Pump Sizes:
    • Weights range from 289 kg (100-180, B03) to 575 kg (200-280, B05S).
    • Nominal discharge nozzle diameter (DN1) ranges from 150 mm to 250 mm.
    • Nominal suction nozzle diameter (DN2) ranges from 100 mm to 200 mm.
    • Shaft end diameter (d1) is 42 mm for B03 and 60 mm for B05S.
    • See the official PDF for full tabulated dimensions of standard pump sizes, including pump feet dimensions.
  • Dimensions of Complementary Pump Sizes:
    • Weights range from 528 kg (200-401, B05L) to 1690 kg (350-400, B07).
    • Nominal discharge nozzle diameter (DN1) ranges from 250 mm to 350 mm.
    • Nominal suction nozzle diameter (DN2) ranges from 200 mm to 350 mm.
    • Shaft end diameter (d1) is 60 mm for B05L and 95 mm for B07.
    • See the official PDF for full tabulated dimensions of complementary pump sizes, including pump feet dimensions.
  • General Assembly Drawings:
    • General assembly drawings with lists of components are available in the official PDF for bearing brackets B03 to B05 and B06 to B07.
  • Design Variants:
    • Design variants with thrower and with plug are detailed in the official PDF.

Materials

  • Component Materials:
    • Volute casing (102): A890 Gr 5A
    • Casing cover (161): A890 Gr 5A
    • Shaft (210): 1.4462
    • Impeller (230): A890 Gr 5A
    • Bearing bracket (330): A216 Gr WCB
    • O-ring (412.50): Viton
    • Mechanical seal (433): 4RPS (KSB) Q1Q11VMG4
    • Casing wear ring (502.01): 1.4501
    • Impeller wear ring (503.01): 1.4501
    • Shaft sleeve (523): 1.4501
    • Throttling bush (542.02): 1.4501
    • Casing studs/hexagon nuts (902.01/ 920.01): 1.6772 A2D
  • Material Type Comparison:
    • Carbon steel: A 216 Gr WCB (ASTM), GP 240 GH+N (DIN EN 10213-2)
    • Super duplex stainless steel: A890 Gr 5A (ASTM), 1.4469.09 (DIN EN 10213-4, PREN > 40)
    • Super duplex stainless steel: A276-S32760 (ASTM), 1.4501 (DIN EN 10088-3)

Electrical

  • Max. Drive Power:
    • At n = 1450 rpm: Up to 2785.4 kW
    • At n = 1750 rpm: Up to 3361.7 kW
    • At n = 2900 rpm: Up to 719.6 kW
    • At n = 3500 rpm: Up to 868.4 kW
    • See the official PDF for specific values per pump size.

Coating and Preservation

  • Coating and preservation to KSB standard.

Product Benefits

  • Double volute from DN 80 (3 in.): low radial thrust and reduced shaft deflection extend the service life of bearings and mechanical seal.
  • Easy to service thanks to back pull-out design.
  • Dimensioned for longer service life than specified by API 610, reducing maintenance expenditure and work.
  • Tandem bearing arrangement absorbs high axial forces.
  • Cast steel bearing brackets with integrated cooling fins enable higher fluid temperatures and reduce bearing temperatures.
  • Optional fan impeller: no cooling water supply required for high temperatures.
  • Wetted components made of super duplex stainless steel for optimum corrosion resistance.
  • Optimised KSB mechanical seal for maximum operating reliability.

Acceptance Tests / Warranties

  • Materials testing: Test report 2.2 on request, Test report 3.1 on request.
  • Final inspection: Inspection certificate 3.1 to EN 10204 on request.
  • Hydraulic test: The duty point of each pump is guaranteed according to ISO 9906/2B.
  • Optional acceptance tests (at extra charge): Performance test to ISO 9906, NPSH test.
  • Other tests: (e.g., vibrations, strength, noise characteristics) on request.
  • Warranty: Warranties are given within the scope of the valid delivery conditions.

Selection Charts

  • Performance selection charts for n = 2900 rpm, n = 1450 rpm, n = 3500 rpm, and n = 1750 rpm are available in the official PDF. These charts indicate available and "on request" sizes. See the official PDF for detailed graphical representations.

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

Curated from selected public technical reference material for discovery and preliminary comparison. This summary is not a substitute for a current certified manufacturer datasheet. Verify revisions and design limits before use.