Hey there. First, I'm not sure where we can discuss refrigerant oils, here seems like the place but if not please forgive me and move the thread to the appropriate arena.
Many years ago the refrigerant standards changed where mineral oils were being phased out for more universal options like POEs. While PAG has been used for years with HFC refrigerants like r134a, we're seeing high-pressure r410 systems call mainly for POE. POE seems to be most preferred as it is compatible with all refrigerants from the old CFCs, to HCFCs and HFCs.
I'm curious about these oils and their additive systems. There are obviously RO (rust-oxidation) additives and AW additives but what exactly are they? Also, some of the POE oils for refrigeration appear to have very low Viscosity Indices and peculiar viscometrics
eg.
A particular Refrigerant POE-150
KV40/100 - 148/14.1
VI - 91
Pour - -27C
These specs notably different than other POEs like Motor Oils based on POE. Are the refrigerant oils straight ester bases with no viscosity altering additives?
Many years ago the refrigerant standards changed where mineral oils were being phased out for more universal options like POEs. While PAG has been used for years with HFC refrigerants like r134a, we're seeing high-pressure r410 systems call mainly for POE. POE seems to be most preferred as it is compatible with all refrigerants from the old CFCs, to HCFCs and HFCs.
I'm curious about these oils and their additive systems. There are obviously RO (rust-oxidation) additives and AW additives but what exactly are they? Also, some of the POE oils for refrigeration appear to have very low Viscosity Indices and peculiar viscometrics
eg.
A particular Refrigerant POE-150
KV40/100 - 148/14.1
VI - 91
Pour - -27C
These specs notably different than other POEs like Motor Oils based on POE. Are the refrigerant oils straight ester bases with no viscosity altering additives?