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Rod, CNKS, Everyone, what do you think of this?

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scott#2

03-10-2006 18:32:31




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Since I got this air compressor, I have been replacing a few things on it to insure its a safe unit. The things replaced are the check valve, the pressure switch (I am retrofitting it with an unloader ckt) and the saftey relief valve. I now have a few more questions! Seems like it never ends. First of all I am going to run 3/4 heavy copper lines & 1/2" drops, probably 4. Does it make sense to put a 3/4" water trap and/or coalaesing filter in the main 3/4" feed before it even makes it to the main grid that the 1/2" lines run off? And then have another filter/water setup and regulator on the 1/2" drop(s) for painting, plasma, blasting, edm machine, etc? Seems like it would then be higher quality air and you could catch most of the junk before it reaches the 3/4" grid. Something like a 30 or 40 micron unit on the 3/4" and then a 5 micron on the 1/2' drops? Or do I have the micron thing backwards? Also on this note; Would this greatly reduce flow?

2nd question;

When I was putting the new ck valve/unloader in the tank, I noticed it had a 1/2" supply tube from the second stage to the tank. (air supply to tank manifold) The 2nd stage head threads are bushed down from 3/4 to 1/2" and so is the tank where the ck valve/unloader screws in. Its bushed from 1" on the tank to 3/4" for the ck valve to screw in. Seems to me this should be a straight 3/4" supply pipe if thats the size on the threads on the head and a 1" thread on the tank? I am just trying to figure out if this is a stock arrangement or an older quick fix. Or would it even make any difference if it was a 3/4 or 1/2" supply tube? I noticed that there are 3- 3/8" tubes with fins running from the 1st stage to the second stage. I guess, I.D wise that would equal a 3 - 1/4" feeds, or 1 3/4" feed to the tank.

What do you think about this? Am I being too particular here?

Thank You,

scott#2

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Rip VanWinkle

03-14-2006 21:06:05




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 Re: Rod, CNKS, Everyone, what do you think of this in reply to scott#2, 03-10-2006 18:32:31  
I have a few tips. If my memory is correct your main supply line should be sloped down hill. In most industrial engeneered systems you would go straight up to youre highest point when leaving the compressor. Then slope all the subsequent runs down slightley with a drop at the end of the run attached on the same plain as the run. All other access points should be connected to the top of the run. Most applications use an inline T with a closed nipple then 90 then closed nipple and another 90 to get headed down to the shop floor. You will still need filters and traps but laying youre pipes out as mentioned will send most of the water and debris to end of the line instead of the first drop it comes to. I hope you find this helpfull. Just remember water runs down hill thats why lines are attached to the top side of the pipe. I dont know your experience level and dont want to insult. Good luck. Rip

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CNKS

03-10-2006 19:45:02




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 Re: Rod, CNKS, Everyone, what do you think of this in reply to scott#2, 03-10-2006 18:32:31  
Too complicated for me. All I have is 3/4 supply lines and 1/2 inch drops. I have paind no attention to how the compressor itself is plumbed. One water trap plumbed into the 1/2 inch drop I use for nearly everything, along with a second identical water trap at the paint booth I added. I have run a sand blaster off the first drop thru the original water trap. The sand blaster itself has a water trap, I have never seen any water in that trap. You will get little restriction thru any of your fittings, on the compressor or otherwise. It is the long runs where you get the drop, those should be 3/4. If I remember right, it was you on tool talk who asked the same questions. I believe Rod told you on that forum that most of the pressure drop comes thru the flexible 3/8 or 1/4 inch lines that go to your tools -- I agree. You can't have too many filters, but I doubt if any water gets past the first one I have, much less the second. My personal opinion is that you have overkill, but I guess that depends on how and what you use your system for.

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Rod (NH)

03-10-2006 19:46:52




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 Re: Rod, CNKS, Everyone, what do you think of this in reply to scott#2, 03-10-2006 18:32:31  
I added my 2 cents on the tool forum.



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