Etanorm RSY

Summary

Product identification

The KSB Etanorm-RSY is a centrifugal pump with a shaft seal, designed for handling thermal oil and hot water. It is available in fixed speed and variable speed versions, compatible with 50 Hz and 60 Hz power supplies.

Main applications:

• Heat transfer systems
• Hot water circulation
• Chemical industry
• Petrochemical industry
• Chemical transformation processes
• Cleaning processes
• Thermal separation processes
• Timber/lumber industry
• Plastics industry
• Food industry
• Paper industry and printing industry
• Textile industry

Fluids handled:

• Hot water
• Thermal oil (on mineral oil basis, or synthetic basis with vapor pressure ≤ 1 bar or ≥ 1 bar at operating temperature)

Designation example: EN-RSY 125-500/2

• Etanorm-RSY: Type series
• R: Extended selection chart
• S: Casing made of nodular cast iron
• Y: Long-coupled design: for heat transfer fluids and hot water
• 125: Nominal discharge nozzle diameter [mm]
• 500: Nominal impeller diameter [mm]
• /2: Two stages (e.g., size 125-500/2); single-stage for others.

Operating limits

• Flow rate (Q):
  • 50 Hz: ≤ 1900 m³/h
  • 60 Hz: ≤ 2285 m³/h
• Head (H):
  • 50 Hz: ≤ 101 m
  • 60 Hz: ≤ 88 m
• Fluid temperature (T):
  • Thermal oil: -30 °C to +350 °C
  • Hot water: ≤ 180 °C
• Operating pressure (p): ≤ 16 bar
• Test pressure: ≤ 24 bar (for both thermal oil and hot water)
• Inlet pressure:
  • Thermal oil: ≤ 10 bar
  • Hot water: ≤ 12 bar
• Permissible circumferential speed of the impeller:
  • Material variant SC1: 60 m/s
  • Material variant SG: 50 m/s

Feed water

• Hot water: Low-salt or fully desalinated water to VdTÜV technical instruction leaflet / AGFW technical instruction leaflet TCN 1466 (VdTÜV) 5/15 (AGFW), edition 02.89.
• Thermal oil: Mineral oil basis or synthetic basis.
• The inlet pressure must not fall below atmospheric pressure.

Electrical

Fixed speed version drive:

• Motor: KSB/Siemens surface-cooled IEC frame three-phase squirrel-cage motor
• Efficiency class: IE2 (size 71/80) / IE3 (from size 90) to IEC 60034-30
• Rated voltage (50 Hz):
  • 230 V / 400 V ≤ 2.20 kW
  • 400 V / 690 V ≥ 3.00 kW
• Rated voltage (60 Hz):
  • • / 460 V ≤ 2.20 kW
  • 460 V / - ≥ 3.00 kW
• Type of construction: IM B3
• Enclosure: IP55
• Duty type: Continuous duty S1
• Thermal class: F with temperature sensor (1 PTC thermistor for size 80/90, 3 PTC thermistors from size 100)
• Explosion-proof design also available with specific ATEX ratings.

Variable speed version drive:

• Motor: KSB SuPremE motor (magnetless synchronous reluctance motor, PumpDrive required)
• Efficiency class: IE4 / IE5 to IEC TS 60034-30-2:2016
• Rated power: 0.55 kW to 45 kW
• Rated speed: 1500 rpm or 3000 rpm
• Frequency: 50 Hz / 60 Hz (PumpDrive input)
• Voltage: 380 V to 480 V (PumpDrive input)
• PumpDrive 2 (frequency inverter):
  • Mains voltage: 3~ 380 V AC -10 % to 480 V AC +10 %
  • Mains frequency: 50 Hz to 60 Hz ± 2 %

Mechanical / hydraulic

Design details:

• Horizontal installation, volute casing pump
• Radially split volute casing with integrally cast pump feet
• Baseframe made of welded channel sections
• Back pull-out design for easy dismantling
• Axial thrust balanced by discharge-side casing wear ring and balancing holes
• Replaceable casing wear rings
• Single-stage design (except size 125-500/2, which is two stages)
• Dimensions and ratings to EN 733 for sizes ≤ DN 200

Shaft seal:

• Cartridge seal
• Standardised mechanical seal to EN 12756
• Available options: KSB 4HL or Burgmann M7 N-5
• Fluid temperature range: -30 °C to +350 °C
• Operating pressure: 40 bar (dynamic) for KSB 4HL, 16 bar for Burgmann M7 N-5
• Mode of operation: Dead-end with air cooling

Impeller type:

• Closed radial impeller with multiply curved vanes

Bearings:

• Drive end: Grease-packed rolling element bearings sealed for life (6413 C3 with Nilos ring JV 6)
• Pump-end: Product-lubricated plain bearing (Carbon KHK standard, optional SiC / SiC)
• Bearing temperature (measured on outside of bearing bracket): ≤ 90 °C

Direction of rotation:

• Clockwise, viewed from the drive end.

Materials (Material variant SC1 / SG):

• Volute casing: Nodular cast iron, EN-GJS-400-18-LT
• Casing cover: Nodular cast iron, EN-GJS-400-18-LT
• Shaft: Chrome steel, 1.4057+QT800
• Impeller: Stainless steel, 1.4408 / A743 Gr. CF8 M (SC1) or Grey cast iron, EN-GJL-250 (SG)
• Bearing bracket: Nodular cast iron, EN-GJS-400-18-LT
• Casing wear ring (suction/discharge side): Grey cast iron / cast iron
• Bearing sleeve: Chrome steel, 1.4122-HV500+80 (optional ceramics SSiC)
• Bearing bush: Carbon KHK (optional ceramics SSiC)

Coating and preservation:

• To KSB standard
• Heat-resistant enamel (RAL 9007, grey aluminium)

Technical data: A detailed table provides impeller diameter, free passage, number of vanes, min/max rpm, volumetric pump content, P/n value, and weight for various pump sizes (e.g., 125-500/2, 150-500.1, 200-330, etc.). See the official PDF for exact tabulated values.

Permissible forces and moments at the pump nozzles: Values for FVmax, FHmax, and Mtmax are provided for different pump sizes at fluid temperatures of 20 °C and 300 °C. See the official PDF for exact tabulated values.

Noise characteristics: Surface sound pressure levels (LpA) are provided for pump and pump set at 1450 rpm, ranging from 64 dB to 79 dB depending on power (PN). See the official PDF for exact tabulated values.

Dimensions: Detailed dimensional tables for pump sets with foundation and for the pump alone are provided, including values for DN1, DN2, and various lengths, widths, and heights. See the official PDF for exact tabulated values and diagrams.

Connections:

• Pressure gauge (1M.1, 1M.2): G 1/2
• Fluid priming and venting (6D.1): G 3/4 (G 1/2 for size 125-500/2)
• Fluid priming and venting (6D.2): G 1/4
• Fluid drain (6B): G 3/4 (G 1/2 for size 125-500/2)
• Fluid drain (8B.1): G 1/4
• Leakage drain (8B.2): G 1/4

Flange design:

• Standard: EN 1092-2, PN 16, Nodular cast iron, EN-GJS-400-15 / A536 GR 60-40-18. Nominal diameters: DN 125, DN 150, DN 200, DN 250, DN 300, DN 350.
• Optional: ASME Class 125, drilled (availability varies by size for suction and discharge nozzles).

Interchangeability of pump components: A table details the interchangeability of various components (e.g., shaft units, volute casing, impeller, mechanical seal) across different pump sizes. See the official PDF for exact tabulated values.

Recommended spare parts stock for 2 years' operation to DIN 24296: A table lists recommended quantities for spare parts such as shaft, impeller, radial ball bearing, gaskets, and mechanical seal, based on the number of pumps. See the official PDF for exact tabulated values.

Scope of supply:

• Pump
• Drive
• Baseplate
• Coupling
• Coupling guard

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

Official datasheet (PDF)

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