Wheel types centrifugal fans may be classified into three basic types according to blade configuration.
Forward curved centrifugal fan diagram.
Forward curve sometimes referred to as a squirrel cage fan forward curve fans are used in most residential and light commercial hvac equipment.
The video below discusses small low pressure centrifugal fans which can move air quickly at a pressure between about 100 and 2 000 pascals.
Forward blade backward blade and radial blade.
Centrifugal fans are capable of generating relatively high pressures.
The graph below illustrates the optimum working area the volume flow is plotted along the x axis and the system pressure is plotted on the y axis.
These fans are for low to medium static applications.
They are the most budget friendly and the least efficient blade design.
Generally centrifugal fans have three types of blade.
Typical centrifugal fan and covers the common terminology of these components.
A forward curved centrifugal fan works best when high pressures against lower volume flows are required.
The centrifugal fans with forward curved blades 2l 90 o are designed due to the small dimensions and good static pressure characteristics of fans and such a recommendation refers to the fans.
Radial or straight blade each type has its own application range and limits.
The characteristic curve of.
They are suitable for high pressure applications as compared with axial flow fans.