How to change the fan flow ah?
Under normal circumstances the volume of the fan to adjust the flow of wind pressure unchanged. Valve adjustment is to increase the pipe resistance, while centrifugal blower, centrifugal fan full wind pressure increases.
Valve adjustment, suitable for centrifugal blower, centrifugal fan;
Bypass adjustment, suitable for Roots blower (volumetric fan);
The wind pressure is the resistance of the outlet, depending on your duct resistance and the pressure of the wind. The Bluestone KL (station contact TA) 1) frequency adjustment, suitable for Roots blower, centrifugal blower, centrifugal fan;
Valve adjustment, will increase the loss of resistance, but the most used method, the wind pressure, including static pressure and dynamic pressure, the two can be transformed into each other, should be selected according to the needs of fans. The world's first N (station contact TA) Roots blower mainly rely on frequency and bypass regulation of air volume, centrifugal fan generally adjust the intake valve to adjust the air volume, rarely with frequency.
