Compatibility of refrigerants and lubricants with motor materials.

Type of article: Article

Summary

The paper reports results from comprehensive tests on the effects of CFC substitute refrigerants and lubricants on insulating materials used in motor construction, such as magnet wires, varnishes, sleeving and sheet insulants. R22 with mineral oil was taken as a comparative base as its behaviour in service is well known. Refrigerants tested include R123, R124, R142b, R134a, R125, R143a, R32, R152a, R134, R245ca, together with various polyol ester and poly-alkylene glycol lubricants. Tests included soaking for 500 hours for absorption, followed by a 24 hour bake at 150 deg C for desorption and embrittlement, also simulated burn out. In general terms the substitute refrigerants behaved better than R22, so compatibility should not be a problem. D.W.H.

Details

Original title: Compatibility of refrigerants and lubricants with motor materials.
Record ID : 1994-2130
Languages: English
Source: ASHRAE Journal - vol. 35 - n. 8
Publication date: 1993/08
Document available for consultation in the library of the IIR headquarters only.

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Indexing

Themes: CFCs;
Lubricants
Keywords: Insulant; Seal; CFC; Lubrication; Chemical reaction; Substitute; Engine; Testing; Refrigerant; Compatibility