General Cataloque CR series

Summary

Product identification

The Grundfos CR, CRI, CRN, CRE, CRIE, and CRNE series are vertical, multistage centrifugal pumps operating at 50 Hz.

• CR, CRI, CRN pumps: These are vertical, multistage centrifugal pumps with an in-line design, allowing installation in horizontal one-pipe systems. They are fitted with Grundfos standard motors (MG or Siemens) designed to EN standards.
• CRE, CRIE, CRNE pumps (E-pumps): These are based on the CR, CRI, CRN pumps but are fitted with an E-motor (Grundfos MGE motor) that includes a built-in frequency converter. This enables continuously variable control of motor speed to adjust performance to specific requirements, offering benefits like energy savings, increased comfort, and control/monitoring. They can also be fitted with an integrated pressure sensor.

Applications The pumps are suitable for a wide range of applications, including:

• Water supply: Filtration and transfer at waterworks, distribution, pressure boosting in mains, high-rise buildings, and industrial water supply.
• Industry: Pressure boosting, process-water systems, washing and cleaning systems, vehicle-washing tunnels, fire-fighting systems, cooling and air-conditioning systems, boiler-feed and condensate systems, machine tools (cooling lubricants), aquafarming, and special transfer duties (oils, alcohols, acids, alkalis, glycol, coolants).
• Water treatment: Ultra-filtration, reverse-osmosis, softening, ionising, demineralising, distillation systems, separators, and swimming baths.
• Irrigation: Field irrigation, sprinkler irrigation, and drip-feed irrigation.

Product Range Overview

• Rated Flow Rate: From 0.8 m³/h (CR 1s) up to 150 m³/h (CR 150).
• Maximum Pump Efficiency: Ranges from 35% (CR 1s) to 81% (CR 90).
• Flow Range (CR pumps): From 0.3 - 1.1 m³/h (CR 1s) to 75 - 180 m³/h (CR 150).
• Flow Range (CRE pumps): From 0.7 - 2.4 m³/h (CRE 1) to 75 - 180 m³/h (CRE 150).

Material Versions

• CR, CRE: Cast iron and stainless steel EN 1.4301/AISI 304.
• CRI, CRIE: Stainless steel EN 1.4301/AISI 304.
• CRN, CRNE: Stainless steel EN 1.4401/AISI 316.
• CRT, CRTE: Titanium (refer to the specific CRT, CRTE data booklet).

Operating limits

• Liquid Temperature Range:
  • Standard: -20 to +120 °C (for CR 1s to CR 20 series).
  • Standard: -30 to +120 °C (for CR 32 to CR 150 series, with specific shaft seals).
  • On request: -40 to +180 °C (for CR 1s to CR 90 series).
• Maximum Operating Pressure:
  • Oval flange connections: 10 to 16 bar.
  • PJE, clamp, union, DIN flange connections: 16 to 33 bar.
  • Note: Specific maximum operating pressures vary significantly by pump model and number of stages. See the official PDF for exact tabulated values.
• Maximum Inlet Pressure: Ranges from 4 bar to 20 bar, depending on the specific pump model and number of stages. See the official PDF for exact tabulated values.
• Ambient Temperature:
  • 0.37 - 0.55 kW MG motors: Maximum +40 °C (at max. altitude 1000 m).
  • 0.75 - 22 kW MG motors: Maximum +60 °C (at max. altitude 3500 m).
  • 0.37 - 22 kW MGE motors: Maximum +40 °C (at max. altitude 1000 m).
  • 30 - 75 kW Siemens motors: Maximum +55 °C (at max. altitude 2750 m).
• Viscosity: Pumping liquids with densities or kinematic viscosities higher than water will result in a considerable pressure drop, a drop in hydraulic performance, and a rise in power consumption. A larger motor may be required in such situations.

Feed water

• Pumped Liquids:
  • CR(E), CRI(E) pumps are suitable for clean, non-aggressive liquids such as potable water and oils.
  • CRN(E) pumps are designed for industrial liquids and acids.
  • CRT(E) pumps (Titanium) are available for saline or chloride-containing liquids like seawater.

Electrical

• Motors:
  • CR, CRI, CRN: Fitted with totally enclosed, fan-cooled, 2-pole Grundfos standard MG motors (or Siemens motors) with principal dimensions to EN standards.
    • Three-phase MG motors are standard.
    • Single-phase motors (1 x 220-230/240 V) are available for 0.37 to 2.2 kW.
  • CRE, CRIE, CRNE: Fitted with totally enclosed, fan-cooled, 2-pole frequency-controlled Grundfos MGE motors with principal dimensions to EN standards.
    • Single-phase MGE motors (1 x 200-240 V) are standard for 0.37 to 1.1 kW.
    • Three-phase MGE motors (3 x 380-480 V) are available for 0.75 to 22 kW.
• Electrical Tolerances: According to EN 60034.
• Insulation Class: F.
• Efficiency Class: IE3 for most 3-phase motors. 0.37 - 0.55 kW pumps and single-phase MGE motors are not part of the IE classification.
• Enclosure Class:
  • MG motors: IP55 (IP44, IP54, IP65 available on request).
  • MGE motors: IP54.
• Supply Voltage (tolerance: ± 10 %):
  • MG motors:
    • 0.37 - 1.5 kW: 3 x 220-240/380-415 V
    • 2.2 - 5.5 kW: 3 x 380-415 V
    • 7.5 - 75 kW: 3 x 380-415/660-690 V
  • MGE motors:
    • 0.37 - 1.1 kW: 1 x 200-240 V
    • 0.75 - 22 kW: 3 x 380-480 V
• Supply Frequency:
  • MG motors: 50 Hz.
  • MGE motors: 50/60 Hz.
• Motor Protection:
  • Single-phase Grundfos motors: Built-in thermal overload switch (IEC 34-11: TP 211).
  • Three-phase motors (from 3 kW): Built-in thermistor (PTC) according to DIN 44082 (IEC 34-11: TP 211). These require connection to an external motor-protective circuit breaker.
  • MGE motors: Incorporate thermal protection against slow overloading and blocking (IEC 34-11: TP 211), requiring no external motor protection.
• Terminal Box Positions: Standard position is on the suction side (Position 6). Positions 3, 9, and 12 are also available.

Mechanical / hydraulic

• Pump Type: Non-self-priming, vertical multistage centrifugal pumps.
• Construction: The pump unit consists of a base, pump head, chamber stack, sleeve, and staybolts. The base has in-line suction and discharge ports.
• Shaft Seal: All pumps are fitted with a maintenance-free mechanical shaft seal of the cartridge type.
  • Standard Shaft Seals:
    • HQQE (0.37 - 45 kW): O-ring (cartridge) (balanced seal), SiC/SiC, EPDM. Temperature range: -40 to +120 °C.
    • HBQE (55 - 75 kW): O-ring (cartridge) (balanced seal), carbon/SiC, EPDM. Temperature range: 0 to +120 °C.
    • HQQV (0.37 - 45 kW): O-ring (cartridge) (balanced seal), SiC/SiC, FKM. Temperature range: -20 to +90 °C.
    • HBQV (55 - 75 kW): O-ring (cartridge) (balanced seal), carbon/SiC, FKM. Temperature range: 0 to +90 °C.
• Pipe Connections: A wide range of flexible connections are available, including:
  • Oval flange (BSP): Rp 1 to Rp 2 (for CR 1s to CR 20 series); Rp 1 to Rp 2 (for CRI/CRN 1s to 20 series).
  • Flange: DN 25/DN 32 to DN 50 (for CR/CRI/CRN 1s to 20 series); DN 65 to DN 125 (for CR/CRN 32 to 150 series).
  • PJE coupling (Victaulic): R 1 1/4 DN 32 to R 2 DN 50 (for CRI/CRN 1s to 20 series); 3" to 4" (for CRN 32 to 90 series).
  • Clamp coupling (L-coupling): ∅48.3 to ∅60.3 (for CRI/CRN 1s to 20 series).
  • Union (+GF+): G 2 to G 2 3/4 (for CRI/CRN 1s to 20 series).
  • Other connections are available on request.
• Minimum Inlet Pressure (NPSH): To avoid cavitation, a minimum pressure on the suction side is required. The maximum suction lift "H" in metres head can be calculated as: H = pb x 10.2 - NPSH - Hf - Hv - Hs Where:
  • pb = Barometric pressure in bar (can be set to 1 bar in open systems; system pressure in closed systems).
  • NPSH = Net Positive Suction Head in metres head (read from the NPSH curve at the highest flow).
  • Hf = Friction loss in suction pipe in metres head (at the highest flow).
  • Hv = Vapour pressure in metres head (depends on liquid temperature).
  • Hs = Safety margin = minimum 0.5 metres head.

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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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