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Thread: Filter cleaning protocol
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12th June 2012, 11:52 PM #1Old Fart (my step daughters named me)
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Filter cleaning protocol
Gents.
I thought I had improved my filter sytem by getting rid of the cloth bag and replacing it with a 1 micron pleated filter. Ever since I have had nothing but trouble with it clogging and blowing off my extrator, thus spreading all sorts of s&$t over my shed. Yes it has paddles that I turn ever couple of minutes but this does not seem to do enough to stop it clogging. When it does blow off I take it outside and blow it out with compressed air and vacuum it. Still it does it again.
What am I doing wrong???????
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12th June 2012 11:52 PM # ADSGoogle Adsense Advertisement
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15th June 2012, 11:52 PM #2
For what its worth what you are doing wrong is collecting the invisible dust in ANYTHING that wil require YOU to handle it later. The stuff is bad enough in the quantities that are made while you are working without concentrating it all in a filter for you toe have to confront all in one hit.
If you catch it in a filter bag or a pleated filter sooner or later you want to clean out the bag or filter. these items only make sense to me if you throw them away with the dust in them, but nobody does that.
Get the best dust extraction you can afford be it a shop vac or a 3 phase 5 hp monster, but vent the exhaust outside the shed! your dust extactor will puill more air and thertefore more dust without the resistance of a filter thereby collecting more dust and by venting it outside you wont have the invisible particles everyone talks about recirculating in the shed.
have a collector inside the shed , preferably a yclone and make sure you can empty it without coming into contact with the contents.
Doug
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16th June 2012, 01:13 AM #3.
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This makes a lot of sense. It's better to use 5 or even 30 micron bags connected to a DC that vents outside a shed than 1 micron bags inside or outside a shed. With the bigger micron bags most (but not all) the very fine dust passes through the bags and gets diluted into the atmosphere where as the 1 micron filters trap enough of the finer stuff to make then worse to handle than the bigger micron bags.
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17th June 2012, 06:51 PM #4
Hey Cookie, what brand / where did you purchase your pleated filter from ?. I have just done exactly the same as you by deleting the cloth bags in place for the JET pleated filter kit as I have had a very bad reaction to Western Red Cedar dust. I got mine from Gregory's Machinery, as my DC is a JET DC1200 2hp job. I am yet to put it through it's paces, it 'WILL' be going back to them for a refund it the thing does what yours is doing ! v Needless to say, all cedar is now banned from my shed.
I never forget anything I remember !!
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17th June 2012, 09:08 PM #5SENIOR MEMBER
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If you are clogging your filter up so quickly i would suggest a couple of things:
1. Put a cyclone stage into the chain. With mine I never even have to turn the paddles.
2. Perhaps your DC could do with a larger filtration area. ie by using a bigger DC or rigging an extra outlet in parallel to the current one.
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17th June 2012, 09:11 PM #6SENIOR MEMBER
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17th June 2012, 11:14 PM #7.
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Yep I agree.
My concern with pleated filters is that retailers and many users see them as quick simple solution to improve dust collection whereas in reality they are often a medium to minor and in many cases of no benefit.
For example; a pleated filter does not fix the fact that any system that uses 4" ducting and a standard DC does not meet BP spec. In these cases I reckon it is more effective to spend the money otherwise spent on a pleated filter on 6" ducting and opening up the inlets on the DC and machines and vent outside a shed.
A pleated filter definitely does add more suck so if the DC system is up to spec and venting outside then it still is worth using one - maybe just wear a dust mask when cleaning bags - we all should do that anyway
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17th June 2012, 11:43 PM #8.
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Another way to view bags and pleated filters
I took a very close look at the pressure differences between bags and pleated filters back when I bought my 3HP bag DC, which has twin large, nominally 5 micron bags. To fit pleated filters (only rated to 3 microns) to this large DC was going to cost an extra $1400 which was significantly more than the original cost of the DC. I figured if I was going to spend that much on a system I might as well just get a clearvue cyclone.
The 5 micron bags that came with my DC are rated at 1" of pressure loss, but because there are two the overall pressure loss is 0.5", compared to the pressure loss of using the pleated filters of 0.15" The reality is that the 0.35" difference in pressure would simply not add much of an increase in flow rate to warrant the cost and I figure I could easily save this pressure losses in other ways.
For example, using 2 x 45º fittings for just one 90º bend saved 0.34" of pressure! - with this simple move I had just saved $1400!
The moral of this story is, if you are having problems with suck, look elsewhere in your system and you might not have to resort to pleated filters. 95% of systems I have seen suck poorly because they use 4" ducting.
The pleated filters do have a significant other advantage and that is that they do not clog up as quickly as bags. So far this has not been that big of a problem for the amount of WW I have been doing as I found I only have to clean the bags every 4 months or so.
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18th June 2012, 12:35 AM #9Old Fart (my step daughters named me)
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My pleated filter is a Hore & Forbes brand. As all this hassle was mainly occuring when turning acrylic blanks I have now resorted to useing my Vacuum and placing that outside the shed as my collection system. I place the nozzle as near as possible to where I am turning and extend the pipe with another one from another cleaner. I understand this is not ideal but is the best I can come up with at present till I vent my dusty to an outside system.
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18th June 2012, 04:45 PM #10GOLD MEMBER
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Bob, was that Mrs Kelly's son you getting the price from? I can supply .5 micron filters a lot cheaper that that. And retailers wonder why we buy stuff OS with prices like you were quoted. Filters only need to be used where the air must be recycled and that is a rare situation in Australia.
CHRIS
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18th June 2012, 08:32 PM #11.
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