CLZ series vertical centrifugal self-priming marine pumps are of small volume, low weight and high function of self-priming. They are easily fixed and used. This series pump is suitable for ballast, fire control, cooling and so on the bilge in all kinds of ships and warships. But the mediums' temperature should be lower than 80 centigrade. The pump could expand its scope of character through cutting impellers. The capacity from 5 cub per hour to 450 cub per hour, head from 20m to 125m.