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Close-Coupled Centrifugal Pumps

Close-coupled centrifugal pumps offer high efficiency, quiet operation, and ease of maintenance with their compact design where the motor and pump are integrated into a single unit. They provide reliable performance for clean water, HVAC, process, and industrial applications.

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Detailed Information on Close-Coupled Centrifugal Pumps

Close-coupled centrifugal pumps are designed with a compact structure where the motor and pump hydraulic body are manufactured as a single unit, offering ease of use and low maintenance requirements. Their high-efficiency hydraulic designs provide a wide range of applications in industrial facilities and commercial settings.

Advantages of Close-Coupled Design

  • • Compact design as motor and pump are combined in a single housing
  • • Low maintenance costs; no alignment required
  • • Silent operation and low vibration
  • • Durable construction suitable for heavy-duty conditions
  • • High-efficiency hydraulic design

Operating Principle

The pump impeller is directly connected to the motor shaft, and energy is transferred to the fluid through the rotation of the impeller. Centrifugal force conveys the fluid to the discharge line. The single-stage design ensures high efficiency and low energy consumption.

Material Options

  • • GG25 cast iron casing
  • • GGG40 ductile iron casing (high strength)
  • • Stainless steel impeller (AISI 304 / 316)
  • • Bronze impeller options
  • • Mechanical seal: carbon/ceramic, SiC/SiC, tungsten carbide
  • • Motor efficiency classes: IE2 – IE3 – IE4

Applications

  • • Clean water and mains pressure boosting
  • • Industrial process lines
  • • HVAC systems (heating – cooling)
  • • Irrigation and agricultural watering systems
  • • Food, textile, and chemical plants
  • • Filtration and auxiliary service pumps
  • • Feed pumps in booster sets

Technical Capacity Ranges

Close-coupled centrifugal pumps are generally manufactured with flow rates ranging from 1 – 740 m³/h and heads from 5 – 160 m. Motor powers vary between 0.75 kW and 132 kW. Despite their compact structure, they offer high performance.