There are many challenges when pumping hot oils. Cavitaition can occur if the oil is too near its boling point unless there is enough pressure applied to stop this. Flashing at the seal face can be a problem when pumping hot oils so cooling and pump designs that ensure a higher pressure around the seal should be used.
Magnetic drive and canned pumps usually offer the safest and most relaible option for thermal oil applications as they contain the oil while avoiding the prolems of seal flashing.
