The signature generally represents the pump model and manufacturer information, the second is the pump displacement, and the third is the pump direction. Fourth, if it is a variable pump, look at its control mode.
The shell number or character string on the pump body is generally the part number of each combination of pumps cast or assembled by the manufacturer, which is generally used by the manufacturer. Rather than the relevant performance of the pump itself.
To know the performance, in addition to looking at the pump standard.
In addition to the maximum working pressure and speed, we should also know the temperature resistance and volumetric efficiency of the pump. These two points are also important parameters of pump performance index.