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R438A Freon™ MO99 in 12 Kg cylinder



R438A Freon™


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The refrigerant with GWP lower than 2,500 for retrofitting R22 systems

Chemours™ Freon ® MO99 (R-438A) is a non-ozone depleting hydrofluorocarbon (HFC) refrigerant formulated to replace R22 in existing direct expansion (DX) systems, where the device's ability to expansion is almost equivalent to the plant capacity (>80%). This is often the case with many water chillers, making Freon ® MO99 the recommended choice for converting DX water chillers.

Field experience has demonstrated that, in the majority of successfully converted systems, the performance of Freon ® MO99 will meet customer needs.

Freon ® MO99 offers similar cooling capacity and energy efficiency to R22 in most systems, but operates at a lower compressor discharge temperature. Actual performance depends on operating conditions and system design.

Freon ® MO99 is compatible with traditional and newly formulated lubricants.

In most cases it is not necessary to change the type of lubricant during the conversion. Oil return is determined by different design and operating conditions.


Freon ® MO99 (R-438A) is applied in residential and commercial air conditioning systems; it also finds application in chillers and in medium and low temperature commercial refrigeration , including systems for catering, refrigerated displays for supermarkets, systems for the conservation and processing of foodstuffs.

Do not use on installations with flooded evaporator or centrifugal units.


  • Non-ozone depleting refrigerant , allowing existing systems to be used
  • Allows topping up during operation without eliminating residual refrigerant
  • Significantly lower discharge pressure and temperature than R-22, resulting in longer compressor life
  • Easy, simple and cost-effective retrofit

Recommended Lubricants:

R-438A is compatible with conventional and newly formulated lubricants, including mineral oil, alkylbenzene, and polyol ester.

In most cases it is not necessary to change the type of lubricant during the retrofit.


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