Pressure: "Waterproof Cooling Fan" refers to boost pressure centrifugal fan (relative to atmospheric pressure), which increased the value of the gas pressure within the fan or the fan inlet and outlet of the gas pressure difference. It has a static pressure, dynamic pressure, total pressure points. Performance parameter refers to the total pressure (equal to the difference between the total pressure of the fan outlet and imports), the unit commonly Pa, KPa, mH2O, mmH2O and so on.
Flow: In "Waterproof Cooling Fan" gas volume flow per unit time fan, also known as wind. Q commonly expressed, common units; m3 / s, m3 / min, m3 / h (seconds, minutes, hours). (Sometimes also used in the "mass flow" that the gas mass flow per unit time fans, this time to consider the import of gas turbine density, and gas composition, local atmospheric pressure, the gas temperature, inlet pressure is closely affected, subject to conversion to get accustomed to the "gas flow."
Speed: "Waterproof Cooling Fan" fan rotor rotational speed. N often expressed in units with r / min (r represents speed, min represents minutes). Power: the power required to drive the fan. N often expressed in units with Kw. Fans commonly use code