P-Q Curve

Fan air volume-static pressure characteristic diagram (P-Q curve) is a curve that shows the relationship between the air volume and the static pressure resulting from loss due to the pressure applied to the inlet and the outlet of the fan. The maximum air volume denotes the volume of air flow able to be obtained when the loss due to pressure (static pressure) is 0. And the maximum static pressure refers to the level of pressure (static pressure) at which the maximum loss is caused.