Filter cleaning

[strebble]

I'm a bit confused about cleaning the filters on the CV1800.
On almost all cyclone collectors with cartridge filters, there are internal brushes or similar to knock down the dust that cakes on the inside of the cartridge/filter. I don't see anything like that on the CV filters. Are you just supposed to whack them from the outside and/or use compressed air? Do you have to take them apart occasionally to clean them? How often do you clean them?
The CV filters have much more surface area it appears, 300x2=600 sq.ft., correct? Most other cartridge types are closer to a bit over 100 sq.ft. Is this possibly why they have the built in cleaning brushes?
I'm also curious about the nano filters. I haven't seen much user experience on the forums. Can anyone tell us their experience?
I was leaning towards the 3hp Grizzly, mainly because of price and ease of shipping to Canada, but now I'm not so sure. A second choice is the 3hp Oneida. I'm a weekend worker in a 24'x17' shop. The more I research, the more confusing it gets.

[cvcsupport]

Hello Strebble,

The Clear Vue dust collection system with filters includes the Wynn 9L300BL filters. Each filter is 300 sq. feet and has a MERV rating of 10. The efficiency rating is 99.99% at .5 micron.

The Wynn 9L300NANO, is similar to the 9L300BL in size and has a MERV rating of 15, is made of nanofiber and has an efficiency rating of 99.999% at .5 micron.

Both are excellent filters and do their job well.

To clean the filters, we recommend you tap the filters once a day and clean out the collection box under the filters. You may also use compressed air in "pulses" about a foot away from the filter - this will push particles to the center of the filter and drop them into the clean out box.

There is more information in another thread at http://www.clearvuecyclones.com/Bullentin/showthread.php?t=730.

I hope this information helps. Have a great day!

[R and D Nikkel]

strebble,
Here is another thread that discusses what the filter ratings do and do not mean. http://www.clearvuecyclones.com/Bull...ead.php?t=1190 The 99.99% at .5 microns doesn't mean it keeps out 99.99% of particles .5 microns and over in size. The MERV ratings, once you figure out what they mean, are much better at telling you the actual % of particles they collect.
Also, since these filters were originally meant to filter from the outside to the inside, they clean much better that way too. After a few years of experimenting with different set ups, we are much happier with our current system with the filters contained in a box so they filter outside to in like they were designed to do.
Just our 2 cents worth.

[strebble]

Thanks for the response
Woodtweaker had posted that he was told the NANO filters were designed to have the air flow go from the center to the outside. Perhaps that's another reason to go with the NANO filters.
As just a weekend woodworker, I suspect that they won't load up too fast for me.?
I still have to wonder why all the other manufacturers are going for the smaller filter with the interior cleaning brushes.

[bababrown]

strebble,
Find Bill Pentz's site and read his section on filters. I think it will answer your question.
bababrown

[R and D Nikkel]

Woodtweaker had posted that he was told the NANO filters were designed to have the air flow go from the center to the outside.

I read that too and was confused, because everything I have seen and read about cartridge filters says they are designed to filter from the outside to the inside. We are just using them backwards. Either way they will filter the air, but I know from experience they are far easier to clean if you filter outside to in.

[bababrown]

Thanks for the response
Woodtweaker had posted that he was told the NANO filters were designed to have the air flow go from the center to the outside. Perhaps that's another reason to go with the NANO filters.
As just a weekend woodworker, I suspect that they won't load up too fast for me.?
I still have to wonder why all the other manufacturers are going for the smaller filter with the interior cleaning brushes.
I think they go with a smaller filter to keep costs down. But then with poor separation the filter clogs quickly so they end up with a cleaning mechanism. This is especially true on the non-cyclone units but even the cyclone units separate so poorly that they clog quickly. Also, realize that doubling the size of the filter cuts the time between cleanings by a factor of four.
bababrown

[Steve P]

Originally Posted by bababrown

I still have to wonder why all the other manufacturers are going for the smaller filter with the interior cleaning brushes.
I think they go with a smaller filter to keep costs down. But then with poor separation the filter clogs quickly so they end up with a cleaning mechanism. This is especially true on the non-cyclone units but even the cyclone units separate so poorly that they clog quickly. Also, realize that doubling the size of the filter cuts the time between cleanings by a factor of four.
bababrown

I suspect that some manufacturers deliberately undersize the filters to create enough air resistance that they are able to undersize the motors also. Upsizing the filters might allow enough air to move that the motors are at risk of burning out.

Of course, the CV design does not have this problem since the motor is larger than it needs to be. Other manufacturers would put a 3HP motor in and run it right at the limit of overheating.

Steve

[R and D Nikkel]

Woodtweaker had posted that he was told the NANO filters were designed to have the air flow go from the center to the outside.

I've still been chewing on this idea and wondering why. So I e-mailed Wynn directly have had a really good e-mail conversation with Dick Wynn who answered personally. Here's the scoop:
Because the hobbyist dust collectors ARE using the filters "backwards" with the air flow from inside to outside compared to the original design for the industrial filters which filter outside to inside, the Wynn people anyway have made filters with the NANO side to the inside to service this market.
However, filters are available with the NANO material on the outside so you can filter outside to inside if you want to. You just have to get the right filters to do that. When I asked which way would make cleaning the filters easier, the response was: "If collector cost and size is a non issue I would have to say that collecting dust on the outside of a pleated cartridge filter ( from the cleaning point of view ) would be better on any given filter."
So there is the answer. Cleaning is easier if you filter outside to in, but setting up to run that way takes more room and hassle. But you can get NANO filters to work either way.
I still haven't heard back from Camfill-Farr...

[strebble]

That's good info, R&D :-)

I plan on placing an order tomorrow for a CV1800 with the NANO upgrade
I'll assume that Clearvue will include the 'inside to out' filters, with the nano material on the inside, or do you think I need to confirm that?

Cheers, Scott