A liquid carbon dioxide pump is a device used to transfer liquid carbon dioxide from a storage tank to a smaller container or to an industrial process. Liquid carbon dioxide is commonly used as a refrigerant, as well as in various industrial processes, such as food processing, chemical production, and oil and gas extraction.Liquid carbon dioxide is stored under high pressure and the pump is used to transfer it at a controlled flow rate and pressure to the desired location. The pump may be a positive displacement pump, such as a piston pump or a diaphragm pump, or a centrifugal pump, depending on the required flow rate and pressure.