Scott A Evans
11-17-2015, 9:06 AM
HEPA'S Lasting about 4 hours of vector/ rastering 1/8" baltic birch plywood. Looking for input on what level of filter is good as pre-filter for HEPA. I have tried the following combinations in order on negative pressure system. HEPA last before jet dust collector.
QTY4 1" merv6 blue/white filter mat, QTY 4 Poly- Sorb carbon filter media, 4" of activated carbon granular, (QTY-2)Rigid VF6000 HEPA Filter. (1 or 2 of HEPA/ blast gates lowering/raising flow as needed) 1.5hp JET DC1100VX-CK dust collector (canister wrapped with carbon filter media)
Also tried this combination:
QTY2 1" merv6 blue/white fiber filter mat, QTY 4 carbon filter media, QTY2 MERV 8 pleated filter 4" of activated carbon granular, (QTY-2)Rigid VF6000 HEPA Filter. (1 or 2 of HEPA/ blast gates lowering/raising flow as needed) 1.5hp JET DC1100VX-CK dust collector (canister wrapped with carbon filter media)
I have plenty of flow until the HEPA's clog at about 4 hours of use, I use blast gates to slow down the airflow when all filters are new and open up as they start to clog up, have slight to mild wood burning smell, we don't see any visible smoke, not loosing air in system.
The HEPA filters are not able to be blown out for reuse, They particles on any of the filter media dont want to come off so I am assuming smoke or resin? I need to find a solution or combination of filters that will give longer use of the air filtration system as the cost of replacing HEPA's is crazy. (been thru 6 in last 4 days) The filter box has strong burnt odor so I might need to go up on the activated carbon.
Any suggestions on improving the setup would be greatly appreciated. Have searched and read Dan's DIY blog but not found info on a good prefilter setup. GLAD we didn't go with the ATMOS dou at this point as those filter costs would be killing me.
Sorry about pic...on IPAD and I can't get it to load in the correct orientation.
Thanks
Scott
QTY4 1" merv6 blue/white filter mat, QTY 4 Poly- Sorb carbon filter media, 4" of activated carbon granular, (QTY-2)Rigid VF6000 HEPA Filter. (1 or 2 of HEPA/ blast gates lowering/raising flow as needed) 1.5hp JET DC1100VX-CK dust collector (canister wrapped with carbon filter media)
Also tried this combination:
QTY2 1" merv6 blue/white fiber filter mat, QTY 4 carbon filter media, QTY2 MERV 8 pleated filter 4" of activated carbon granular, (QTY-2)Rigid VF6000 HEPA Filter. (1 or 2 of HEPA/ blast gates lowering/raising flow as needed) 1.5hp JET DC1100VX-CK dust collector (canister wrapped with carbon filter media)
I have plenty of flow until the HEPA's clog at about 4 hours of use, I use blast gates to slow down the airflow when all filters are new and open up as they start to clog up, have slight to mild wood burning smell, we don't see any visible smoke, not loosing air in system.
The HEPA filters are not able to be blown out for reuse, They particles on any of the filter media dont want to come off so I am assuming smoke or resin? I need to find a solution or combination of filters that will give longer use of the air filtration system as the cost of replacing HEPA's is crazy. (been thru 6 in last 4 days) The filter box has strong burnt odor so I might need to go up on the activated carbon.
Any suggestions on improving the setup would be greatly appreciated. Have searched and read Dan's DIY blog but not found info on a good prefilter setup. GLAD we didn't go with the ATMOS dou at this point as those filter costs would be killing me.
Sorry about pic...on IPAD and I can't get it to load in the correct orientation.
Thanks
Scott