Phillips 66® Heat Transfer Oils are high-quality straight or inhibited mineral oils
developed for use in open and/or closed liquid-phase heat transfer systems.
They have excellent thermal stability and provide excellent resistance to cracking
and sludge formation for long service life. They are not recommended for use in
vapor-phase heat transfer systems.
Heat Transfer Oil 32/46 is a straight paraffinic mineral oil recommended for use
in closed systems operating under relatively mild conditions. Heat Transfer Oils
22, 32 and 46 are paraffinic mineral oils fortified with select additives that provide
enhanced oxidation resistance for long service life, and detergency to help keep
the system providing maximum heat transfer efficiency. They are recommended
for use in both open and closed systems operating under more severe conditions.