Are regulating dampers in front of the inlet of variable-frequency fans (such as blowers and exhaust fans) an essential feature?
Thread Content
Many chemical companies require that regulating dampers be installed in front of the inlet of all fans; some even insist on the use of actuators. This is done partly to facilitate regulation of variable-frequency fans, and partly because it is necessary to shut them down for safety during maintenance. Is this really essential?
The fan inlet control damper functions as a valve at the pump outlet
The adjustment damper in front of the inlet is generally used to regulate air volume for energy savings; if it is variable frequency, it holds little significance
Would variable frequency plus baffles be good? I see that this baffle is present at the inlet of large fans – is it standard equipment?