? for you guys with large CFM compressors

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duke46
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? for you guys with large CFM compressors

Post by duke46 » Wed Oct 08, 2014 7:30 pm

My friends 1/2 460 Ford pull along compressor can put out upwards to 150 CFM. At this time until I install the new piece and then get it adjusted correct he is at 90 lbs at the unit where the hose connects.

Problem is by the time it goes through to water separators he is down to like 50 lbs or lower but it still blast ok but could be better if we can get more pressure to the pot.

What is the average size air line do you have running from the compressor to the pot and then what are you using to catch any moisture and it not take so many air pressure lbs away from the input to the pot?

Now to see if I am lucky enough to find info on the net???
All I have said is said just for meanness so I don't have to argue with anyone!

http://www.pcitdad.com" onclick="window.open(this.href);return false;

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duke46
Posts: 11460
Joined: Thu Jun 03, 2010 9:32 pm
My Location: East Coast NC
Location: New Bern NC
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Re: ? for you guys with large CFM compressors

Post by duke46 » Wed Oct 08, 2014 7:48 pm

Good info here if I am understanding it all. Worth printing out page 2-2 and keep it handy.

http://www.metalfinishingsupply.biz/219 ... liness.pdf" onclick="window.open(this.href);return false;

Also info here

http://www.metalfinishingsupply.biz/html/nozzles.html" onclick="window.open(this.href);return false;
All I have said is said just for meanness so I don't have to argue with anyone!

http://www.pcitdad.com" onclick="window.open(this.href);return false;

Miller821
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Location: Carbondale, IL

Re: ? for you guys with large CFM compressors

Post by Miller821 » Wed Oct 08, 2014 8:42 pm

I'm not sure why he is having that much pressure loss unless he is really choking it down into a small line, has too large of a nozzle for his CFM, or has an extremely long line. What size nozzle is he using?

On my 185CFM compressor its max output is 125psi. Depending how much air I am using it can dip lower to more like 90 psi. With the nozzle that I am currently running however, I can blast at 100psi and maintain that pressure no problem. I think it is recommended for 185CFM to have a 1" inner diameter hose. I have that size running into my pot, and then have a blast hose that I think is either 1-1/8 or 1-1/4", not sure which.

I would look at his piping and see what size it is, and also check the nozzle size. I recommend if you still can't find the answer do some searching and/or questioning at this site: http://www.contractortalk.com/f95/" onclick="window.open(this.href);return false; These guys know there stuff and work with these sized compressors daily.

Enigma
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Re: ? for you guys with large CFM compressors

Post by Enigma » Thu Apr 23, 2015 12:30 am

Miller821 wrote:I'm not sure why he is having that much pressure loss unless he is really choking it down into a small line, has too large of a nozzle for his CFM, or has an extremely long line. What size nozzle is he using?

On my 185CFM compressor its max output is 125psi. Depending how much air I am using it can dip lower to more like 90 psi. With the nozzle that I am currently running however, I can blast at 100psi and maintain that pressure no problem. I think it is recommended for 185CFM to have a 1" inner diameter hose. I have that size running into my pot, and then have a blast hose that I think is either 1-1/8 or 1-1/4", not sure which.

I would look at his piping and see what size it is, and also check the nozzle size. I recommend if you still can't find the answer do some searching and/or questioning at this site: http://www.contractortalk.com/f95/" onclick="window.open(this.href);return false; These guys know there stuff and work with these sized compressors daily.

What are you doing about moisture in your lines? I just got a 185 cmf diesel compressor and i'm getting a lot of moisture in my lines.

Miller821
Posts: 129
Joined: Fri Sep 07, 2012 9:39 pm
My Location: Carbondale, IL
Location: Carbondale, IL

Re: ? for you guys with large CFM compressors

Post by Miller821 » Thu Apr 23, 2015 10:21 pm

You'll have to purchase at least an after cooler and a water separator if you don't already have one to get dry air. The pot I bought (Surface Tek) came with a 250cfm after cooler and water separator. I've yet to have any moisture problems with this set up, but in case I do I have another after cooler that I could throw on as well.

At the bottom of the second page is a picture of the ones I have.
http://www.gosodablasting.com/blastingp ... ochure.pdf" onclick="window.open(this.href);return false;

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