These pumps are of similar construction to the ECC type and are usually located within the refrigerated cargo tank of a marine gas carrier to transfer such fluids as LNG, LPG, Ethylene, etc. These units are available for all applications of liquefied gas carriers and are used for main cargo unloading, stripping, spray and emergency (retractable) service. The units are fixed to the bottom of the tanks using a mounting arrangement designed to minimize stresses, and are connected directly to the discharge piping, which then travels out through the tops of the tanks.

Flow capacities range from 20 to 3000 m³/h and with heads up to 200 meters on single stage pumps. A single stage design is most often used, although multi-stage pumps can also be supplied if required.

Electric power feed cables and deck penetration assemblies provided by Cryodynamics meet the requirements of all the major ship classification societies. The main in-tank power cables are Cryodynamics UL listed armored cables, and can be provided in all voltage ranges up to 8000 volts. Special designs with built-in internal filtration are available to handle cargoes that are likely to suffer particulate contamination such as LPG.