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Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Garage - Tools> divilbiss and sharpe filter/reg combo the same thing?
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Topic Review (Newest First)
02-25-2013 11:37 AM
69 widetrack Your more than welcome...I hope it has helped.

Ray
02-25-2013 08:15 AM
jss thank you very much for taking the time to help me out.
02-25-2013 12:16 AM
69 widetrack What you have read online is 100% correct...it's not just Campbell Hausfield...it's most compressor companies (not to offend, but especially compressor manufacturer's that aren't on the high end). The 11 CFM that the manufacturer claims is what the pump produces at maximum RPM.

As far as what your producing with the filters...I don't know...we can guess...but without knowing exactly what your compressor is putting out, (manufacturer's have been known to embellish on CFM output as well). If the compressor manufacturer is correct in claiming 11 CFM....you can flow another 59 CFM through your filtration system without any problem. Filters need to withstand much more CFM than the compressor's they are hooked up to. If your concern is that the filtration system is going to restrict your air lines...and from what I'm reading it sounds like that is your concern...going from 3/4" to a 1/2" filtration system...you will not notice it.

You are wise not to run your sandblaster for very long...if you did, many problems will occur. The compressor will over heat, causing warpage of the compressor head, condensation and possible oil contamination in the air that you are now trying to filter and in turn reducing the life of your filtration system, your compressor, your air lines and your bank account. So in short...don't run your compressor to the point that it overheats...it costs lots of money.

I hope this helps you...I know it can be confusing. I will say it again, going from 3/4" to 1/2"...you will not notice it when your sandblasting.

Ray
02-24-2013 11:49 PM
jss blaster is rated 15cfm

compressor is 11cfm at 90 psi 3.2 hp but the sticker on compressor is saying (peak of 6.5hp) but I read online campbell hausfield over rates there units but true hp is 3.2

I don't use it for long times

I run in blast a engine mount bracket etc small stuff when doing engine rebuilts etc. so nothing more then 5min at a time

so if my compressor is 11cfm does that mean coming out of the tank (full tank of air too) or does that number mean what the pump is producing.

in other words what I am fishing to see is how close to 70cfm((rating of 1/2 size filtration) I am production thru the lines
02-24-2013 08:25 PM
69 widetrack Your understanding it to a degree, the 1/2" air line filter/trap will not be a reason you can sand blast...Now your planning on sand blasting with a 3.5 horse compressor? That may be a reason you can't sand blast...for a long time anyway, you have a 60 gallon holding tank...that is another reason your not going to be able to sandblast for a long time...you will run out of air, even if you had a 1 foot air line, the compressor and tank will not keep up with a sandblaster for any great amount of time....How many CFM does the sandblaster take and how many CFM does the compressor put out? I have not seen a 3.5 horse compressor with a 60 gallon tank keep up to a shop sized sandblaster. I think even one of those self vacuuming hand held sandblaster's would have a hard time keeping up.

Ray
02-24-2013 05:54 PM
jss I do and sorry for silly question I really dont understand this stuff hense why I am concerned on how I spend my money and what to get.

My compressor is the Campbell hausfeld 3.2hp 60 gal at 11ish cfm@90

my understanding is on cfm(correct me if I am wrong)

example:
If lets say my current sand blaster is calling for 15-20 cfm . and the 1/2" version of the filter system is rated at 70 cfm of flow. In this case the filters can flow the 70 which is way more then 15-20 so I would not be restricting anything by the 1/2 filters. did I understand how cfm ratings works?
02-24-2013 04:05 PM
69 widetrack Most shops run 1/2" inch air lines even if they employ 4 or 5 people, with respect to CFM, your compressor will determine how much CFM is going through the lines...so before you get concerned about air volume let me ask you, how many CFM's does your compressor put out...how big is your holding tank and what's the horse power rating of the electric motor running your compressor head. Did you realize that most shops run 3/8" inch air hoses? 1/2" inch air hoses are to bulky and cumbersome for normal use (some shops will use a 1/2" hose in the paint booth but that's the only place)...so if your concerned about reducing from 3/4" to 1/2" and your going to use a 3/8" inside diameter hose....do you now understand where I'm going with this?

Ray
02-24-2013 03:32 PM
jss I have been doing some more research and I see alot talk about 3/4" lines but then install 1/2 filtration. I don't understand this.

if I was to use the sharpe 705fc which is 1/2 the cfm flow is like 70.



compared to 3/4 version is 300cfm on stage 1 filter and 115cfm on stage 2 filter..
02-23-2013 04:25 PM
69 widetrack It wouldn't surprise me one bit if they where all the same...on the outside anyway...the inside...well that would surprise me a bit. I've seen Astro tools that break by taking them out of the box...some look like CP...that's why I wouldn't buy Astro.

Ray
02-23-2013 04:17 PM
joe_padavano I'd still like to hear an answer to the original question, as I too have wondered if the Devilbiss/Sharpe/Astro filters are the same or not. With the exception of the shutoff valve on the outlet, the parts look IDENTICAL. My money says that all three are made from Chinesium.
02-23-2013 02:15 PM
jss really? thats good to know makes me feel better.
02-23-2013 01:46 PM
69 widetrack The 1/2 inch will work fine...the only time it wouldn't would be if you hire a bunch of employees and the're all using air at the same time...but by then you'd probably need a bigger compressor...not to worry.

Ray
02-23-2013 01:03 PM
jss i think your right just saying the 3/4 filter option since down the road if i up my compressor and sandblaster it will give me one less thing to have to redo
02-22-2013 04:47 PM
69 widetrack I'm going to save you $165...get a few reducing couplers from 3/4 to 1/2 inch, you won't notice the 1/4 inch reduction for the filters, most automotive shops are 1/2 inch line.

Hope this helps.

Ray
02-22-2013 04:36 PM
jss the price does jump from 1/2 set up to 3/4 i can get
1/2" version with reg for 259. but i was worried the smaller sizing
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