scope:

This specification covers requirements for physical properties, source approval procedure, quality control, packaging and identification and approved sources of supply.

Restricted Chemical Substances

All product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification.

APPLICATION

This specification covers three types of lubricants suitable for use in mobile air conditioning systems. Two of these are compatible with the HFC-134a refrigerant and the third is compatible with the discontinued R-12 refrigerant. These lubricants are used for factory fill, assembly applications, and in service applications.

Type I: A mineral oil based lubricant compatible with R-12 refrigerant and commonly used as the compressor service oil in A/C systems using R-12 refrigerant. It is also commonly used as a lubricant for O-rings in the A/C fitting assemblies for both R-12 and HFC-134a refrigerant systems.

Type II: A Polyalester based synthetic lubricant that is compatible with HFC-134a refrigerant and is used only as a compressor oil in factory fill and service applications.

Type III: A Polyalkylene Glycol (PAG) based synthetic lubricant that is compatible with HFC-134a refrigerant and is used only as a compressor oil in factory fill and service applications.

Type IV: A Polyalester based synthetic lubricant that is compatible with HFC-134a refrigerant and is use as a compressor oil in electric vehicles in factory fill and service applications.