YTD type barrel pumps are mainly used in refineries, petrochemical industry, coal chemical industry, cryogenic engineering, condensate extraction, liquefied gas engineering, and other industries and fields. Suitable for transporting various clean easily vaporized media and low-temperature media, such as ethylene, liquid ammonia, liquefied gas, condensate, oil, etc. The YTD type pump structure is a vertical multi-stage, radially split, radial guide vane or diversion shell and barrel centrifugal pump. The first-stage impeller of this series of pumps is generally specially designed and has good cavitation performance. If necessary, an inducer can be added to further improve the cavitation performance. The secondary impeller is generally a radial impeller, and the extrusion chamber is generally a guide vane, forming a vertical multi-stage structure. The design and manufacture of this type of pump fully comply with the relevant requirements of the VS6 pump in the 11th edition of API610. The shaft seal of the pump fully complies with API682-20.