watana
28-03-2005, 02:26 PM
anyone know what is the final pressure drop of the HEPA can be defined? I had a problem of setting the filter clogged alarm, are the setting related to your fan curve.
Now my exhaust fan is operating with a frequency inverter at 40Hz which can achieve the exhaust flow rate with new HEPA filters, i.e. not in full load condition with a static pressure locate at mid stream of air duct to control the frequency inverter.
I plot the fan curve had about 700pa differrential between the full load speed fan & 40Hz speed.
As the AAF web site do not have the final resistance figure or graph of the ASTROCEL I filter,
CAN ANYONE HELP? THANK YOU
Now my exhaust fan is operating with a frequency inverter at 40Hz which can achieve the exhaust flow rate with new HEPA filters, i.e. not in full load condition with a static pressure locate at mid stream of air duct to control the frequency inverter.
I plot the fan curve had about 700pa differrential between the full load speed fan & 40Hz speed.
As the AAF web site do not have the final resistance figure or graph of the ASTROCEL I filter,
CAN ANYONE HELP? THANK YOU