Air compressors - help?, an education |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Air compressors - help?, an education |
VaccaRabite |
Dec 26 2006, 06:51 PM
Post
#1
|
En Garde! Group: Admin Posts: 13,554 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
So I went to Home Depot today, armed with some scratch and the will to buy an air compressor and a DA air sander.
HD sells the husky line. So, I went to the tools, found a DA sander (Husky, needed 4cfm @ 90psi, and the box said it would work continously with 20+ gallon compressors). Then I walked over to look at compressors. They had a Husky 24 gallon compressor that flowed 5.1 cfm @ 90 pis on sale ($225). Score! but then, on top of the motor, was a little chart with reccomended tools and non-reccomneded tools. All sanders and DA sanders were non-reccomneded. I called over a HD floor guy, who called over another 2 guys, and we could not see a good reason for the prohibition. But, we decided that if the factory did not reccomend it, then it should not be used as such, and I walked over to the electric tool section and bought an electric DA sander. (IMG:style_emoticons/default/sad.gif) I am going to need to buy a compressor by the spring. I'm clearly in the "hobbiest" catagory, and may not use the tool again for a long time aftyer I am done with my 914, but when it comes time to paint, it will probably be cheaper for me to buy one then rent one - given the slow nature that I work. I want to know why the sander was not reccomended, when the compressor could flow the air and had a big enough tank according to the tool. I have theories, but I thought somone here might be able to give better advice. Thanks Zach |
Borderline |
Dec 27 2006, 12:02 AM
Post
#2
|
Senior Member Group: Members Posts: 720 Joined: 8-February 05 From: San Juan Bautista, CA Member No.: 3,577 Region Association: Northern California |
QUOTE I do, however have a 30' run of pvc before the hose, angled so the water will run back into the compressor after the air cools, and that's what has prevented any water problems. sww914: everything I've read says not to use pvc for compressed air. What pressure are you running and what size and schedule pvc are you using? I would like to use pvc to save some money but also like to be on the safe side. I'm surprised someone has mentioned Home Depot and Trekkor hasn't chimed in. (IMG:style_emoticons/default/chairfall.gif) (IMG:style_emoticons/default/chairfall.gif) (IMG:style_emoticons/default/chairfall.gif) |
sww914 |
Dec 27 2006, 12:57 AM
Post
#3
|
Advanced Member Group: Members Posts: 2,439 Joined: 4-June 06 Member No.: 6,146 Region Association: None |
QUOTE I do, however have a 30' run of pvc before the hose, angled so the water will run back into the compressor after the air cools, and that's what has prevented any water problems. sww914: everything I've read says not to use pvc for compressed air. What pressure are you running and what size and schedule pvc are you using? I would like to use pvc to save some money but also like to be on the safe side. I'm surprised someone has mentioned Home Depot and Trekkor hasn't chimed in. (IMG:style_emoticons/default/chairfall.gif) (IMG:style_emoticons/default/chairfall.gif) (IMG:style_emoticons/default/chairfall.gif) I haven't read that, but I've never researched the subject either. I have 1" so there won't be much pressure drop over 30' but I don't remember if it's sch40 or sch80, it's the thick stuff you can get at the hardware store. I've worked in a bunch of body shops and at least half had PVC, the others had iron or copper. Copper is probably the best, but it's so blinking expensive that the shop owners use the smallest that they can get away with and the guy in the stall farthest away from the compressor only gets 80#, and the other guys close to it get 125#. I'm running 150#, and maybe I can't recommend that you do the same, but it's worked for me for 2 years. In a shop, about once a year or so, the pvc will blow out somewhere and you have to shut it down for a 1/2 hour, but it's easy to fix. I have mine at the top of the wall, so WHEN it blows it won't shoot me right in the nuts with a pile of hardware or whatever, and now that I think of it, all of the shops that had PVC had it running way up on the wall, except for the drops down to the outlets. |
Twystd1 |
Dec 27 2006, 01:19 AM
Post
#4
|
You don't want to know... really..... Group: Members Posts: 2,514 Joined: 12-September 04 From: Newport Beach, California Member No.: 2,743 |
As a option for PVC.
I just got done doing a whole shop in Copper. A friend of mines Harley shop. I owed him a favor.... (IMG:style_emoticons/default/KMA.gif) 3/4 inch copper.. At 25 bucks a 10 foot stick. Plus all the 90s and couplers. It cost a mint to do it. The reason..????????????? A 3/4 inch schedule 80, 90 degree PVC elbow shattered and nailed a mechanic in the face. Bout an inch below his eye... Took 12 stitches to fix the wound. The system has a constant 125PSI in the lines. I have seen this time and again..... And I have seen PROPERLY installed PVC air lines have ZERO problems. For years..!!!! Most folks don't hang PVC properly. Most folks don't use primer on all joints. Most folks don't inspect all of the plastic fittings before asembly. And most of all.... folks thread in metal connectors too deep into the plastic female connector and put a stress point in the plastic... Thats a time bomb waiting to happen. And the colder PVC gets. The propensity to shatter is excaserbated. (love that word) Me... I won't use PVC..... I don't like the odds of an occasional flying piece of shrapnel in a shop or garage. Then again.... I am a nut case when it comes to doing stuff right. (read: usually expensive) Cheers and watch out for flying objects. Clayton |
Lo-Fi Version | Time is now: 28th September 2024 - 07:30 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |