Industrial refrigeration

Whether frozen foods, freeze-dried fruits and vegetables or tempered cold stores – industrial refrigeration technology has a wide range of applications. Due to continuous developments, the requirements for availability, safety and environmental protection are subject to constant change. For example, with the "F-Gases Regulation", refrigerants such as ammonia and carbon dioxide are more frequently used. The regulation aims to reduce emissions of fluorinated greenhouse gases. As a result, the requirements for tightness and design of the corresponding components must be adjusted.


Compact, lightweight and environmentally friendly

With the NIKKISO Non-Seal canned motor pump, LEWA offers suitable solutions in a wide variety of areas. From cold storage, cooling and freezing to pumps for hazardous areas.

Advantages of the NIKKISO Non-Seal canned motor pump in refrigeration technology:

  • Compact design
  • Easy installation
  • Extremely low noise level
  • High environmental friendliness due to conformity with TA Luft (Technical Instruction on Air Quality Control) 
  • High safety factor due to twin protecting shell
  • Advanced monitoring device for bearings (E-monitor)
  • Installation in hazardous areas


Typical fluids for cooling:

  • Carbon dioxide (CO2)
  • Ammonia (NH3)
  • Mixture of biphenyl and diphenyl ethers
  • Dibenzyltoluol
  • Different freon fluids, such as:
    • R-134a (C2H2F4
    • R-125 (CF3CHF2)
NIKKISO Non seal canned motor pump


A technology for everyday life.

Refrigeration, modern coolants or tempered cold stores have become indispensable in our everyday life. Pumps are used in refrigeration technology at various points: in the food industry (cold storage, cooling and deep-freezing with natural and synthetic refrigerants), in the chemical industry (refrigeration systems) or for oil cooling systems for transformers.


For larger systems, the refrigerant is metered to the individual evaporators. The resulting pressure and the risk of icing pave the way for hermetically sealed pumps without shaft seals. During the return to the reservoir, the medium is condensed by the compressed and cooled refrigerant vapor in the compressor circuit and thus gets back to a liquid state



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NIKKISO Non seal canned motor pump

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The NIKKISO NON-SEAL canned motor pump has been designed specifically for the chemical industry. To do this, the centrifugal pump is designed in accordance with API 685.

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