Cargo oil pump is a special machinery on cargo oil transportation ships, and it mainly completes the loading and unloading of cargo oil. Therefore, it is as important as the lifting machinery on dry cargo ships. Due to the different sizes of cargo oil tankers, the different types of oil loaded, and the specific conditions of each type of ship, the requirements for cargo oil pumps vary. There are many types of cargo pumps used on cargo tankers, including rotary cargo pumps, reciprocating cargo pumps, and centrifugal cargo pumps. According to their driving methods, they mainly include: steam direct acting cargo pumps, steam turbine cargo pumps, electric motor cargo pumps, diesel engine cargo pumps, and hydraulic motor cargo pumps. The selection of cargo oil pumps is usually based on the three main points of safety, economy, and maintenance management, combined with the actual situation.
The cargo pumps of small cargo oil tankers are mainly electric rotary pumps, especially on small product oil tankers, where electric gear pumps are mostly used as cargo pumps; Steam direct acting reciprocating piston pumps are used as cargo pumps on small cargo oil carriers with a tonnage of less than 15000 tons; The vast majority of cargo oil tankers with a capacity of more than 20000 tons use centrifugal cargo pumps driven by steam turbines, as they have the advantages of large displacement, safety, and reliability, and can meet the needs of large cargo oil tankers.
