Cryogenic liquid pump (hereinafter referred to as low temperature pump) is a special pump used for transport in the oil, air separation and chemical plant cryogenic liquid (such as liquid oxygen, liquid nitrogen, liquid argon, liquid hydrocarbon and liquefied natural gas (LNG), etc.) . Its purpose is to transport cryogenic liquid from low pressure to high pressure. With the development of air separation technology, cryogenic liquid has been widely used and developed.

Its main functions in air separation equipment are: used for liquid circulation or extract liquid from the storage tank and press it into the carburetor after vaporization and send to users.