CO

Summary

Product Identification

The CO Series comprises centrifugal pumps with open impellers, equipped with IE2/IE3 motors compliant with Regulation (EC) no. 640/2009. These pumps are designed for 60 Hz operation and feature threaded connections.

An example model identification, COM 350/156K, signifies a single-phase CO series electric pump with a flow rate of 350 l/min, a rated power of 1.5 kW, 60 Hz operation, and a Silicon Carbide/Tungsten Carbide mechanical seal.

Available models include both single-phase (COM) and three-phase (CO) versions across the CO 350 and CO 500 series.

Operating Limits

• Delivery: Up to 900 l/min (54 m³/h)
• Head: Up to 24 m
• Temperature of pumped liquid:
  • Standard version: -10°C to +110°C
  • With EPDM elastomers: -30°C to +110°C
• Maximum working pressure: 8 bar (PN 8)
• Suspended solids handled:
  • CO350 models: Up to 11 mm
  • CO500 models: Up to 20 mm
• Maximum ambient temperature: 40°C

Feed Water

• Suspended solids: CO350 models can handle up to 11 mm, and CO500 models up to 20 mm.
• Liquid temperature range: -10°C to +110°C for the standard version, or -30°C to +110°C when equipped with EPDM elastomers.
• NPSH and Suction Conditions: The datasheet provides detailed information on Net Positive Suction Head (NPSH) to prevent cavitation.
  • Suction loss due to water temperature:
    • 20°C: 0.2 m
    • 40°C: 0.7 m
    • 60°C: 2.0 m
    • 80°C: 5.0 m
    • 90°C: 7.4 m
    • 110°C: 15.4 m
    • 120°C: 21.5 m
  • Suction loss due to elevation above sea level:
    • 500 m: 0.55 m
    • 1.1 m at 1000 m
    • 1.65 m at 1500 m
    • 2.2 m at 2000 m
    • 2.75 m at 2500 m
    • 3.3 m at 3000 m
  • For detailed flow resistance values in straight pipelines, bends, valves, and gates, refer to the official PDF.

Electrical

• Motor Specifications:
  • Type: Asynchronous, squirrel cage rotor, enclosed construction in aluminium casing, external ventilation.
  • Protection: IP55
  • Insulation Class: 155 (F)
  • Performance: According to EN 60034-1
  • Compliance: Standard supplied IE2/IE3 three-phase surface motors ≥ 0.75 kW comply with Regulation (EC) no. 640/2009 and IEC 60034-30.
  • Features: Condensate drain plugs on all motors.
• Standard Voltage (60 Hz):
  • Single-phase version: 220-230 V. Includes built-in automatic reset overload protection up to 1.5 kW; for higher powers, protection must be provided by the user.
  • Three-phase version: 220-230/380-400 V. Overload protection to be provided by the user.
• Electrical Data Tables: Detailed electrical data (input power, current, capacitor) for single-phase and three-phase models across CO 350 and CO 500 series at 60 Hz, 2 poles are available. Motor efficiency, power factor, and other specific electrical parameters are also tabulated for various kW ratings. For a comprehensive list of standard and optional voltages and frequencies, refer to the official PDF.

Mechanical / Hydraulic

• Pump Design:
  • Close-coupled, single-impeller centrifugal pump with axial suction and radial delivery.
  • Threaded suction and delivery ports (Rp ISO 7).
  • Compact construction; adaptor for motor/pump coupling; the impeller is keyed directly to the motor shaft extension.
  • Back pull-out design allows maintenance without disconnecting the pump body from system pipes.
• Materials in Contact with Liquid:
  • Pump body: AISI 316L stainless steel
  • Impeller: AISI 316L stainless steel (open impeller with four pressed vanes)
  • Seal housing: AISI 316L stainless steel
  • Shaft extension: AISI 316L stainless steel
  • Impeller locknut and washer: AISI 316 stainless steel
  • Fill/drain plugs: AISI 316 stainless steel
  • All components in contact with pumped liquid are made of AISI 316L stainless steel.
• Mechanical Seal:
  • Standard version: Carbon/Ceramica faces, FPM elastomers. Other parts are made of AISI 316L stainless steel.
  • "K" version: Silicon Carbide and Tungsten Carbide faces, FPM elastomers. Other parts are made of AISI 316L stainless steel.
  • O-Rings: FPM (standard version).
  • Optional materials are available for mechanical seals and O-rings.
• Hydraulic Performance: Hydraulic performance tables for CO 350 and CO 500 series at 60 Hz, 2 poles, provide total head (m) at various delivery flow rates (l/min, m³/h) for different pump types and rated powers. See the official PDF for exact tabulated values.
• Dimensions and Weights: Dimensions (DNA, DNM, D, H2, L, L1 in mm) and weights (kg) are provided for various CO and COM pump models. See the official PDF for exact tabulated values.

Applications

• Washing of metal parts and/or surface treatment
• Washing of produce in the packaging industry
• Food industry washing equipment and systems
• Dyeing plant and textile industry
• Plants for the circulation and transfer of moderately viscous liquids, with light chemical aggressiveness
• Industrial washing machines and commercial dishwashers
• Water Purification: De-ionized water, Water treatment, Filtration, Commercial pools
• Food and Drink: Food processing, Bottle washing, Citrus processing, Dish washing, Brewing, Sanitary ware
• Medical: Laser cooling, Medical chillers, Sanitary equipment
• Heating, Ventilating & Air Conditioning (HVAC): Air scrubbers, Water re-circulation, Cooling towers, Cooling systems, Temperature control, Chillers, Induction heating, Heat exchangers, Water heating
• Graphics: Film washing, Cooling
• Plastics: Extrusion machines, Temperature control, Manufacture of polymers
• Waste Management: Waste treatment
• Machine Tool: Degreasing, Parts washing, Chemical treatment, Heat treatment
• Laundry: Industrial and Commercial washing
• General Industry: Spray Booths, Light chemical transfer, Booster systems, Firefighting systems

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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)

Lenntech datasheet mirror