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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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Evaporator coils for compressed air dryers
On Tue, 23 Aug 2005 19:16:12 GMT, Ignoramus19820
wrote: I was highly impressed with use of evaporator coils for drying compressed air. I called a few HVAC contrators from yellow pages, and, unfortunately, none of them could give me anything. I would like to hear some creative ideas on where to get them. Actually I think your idea of a automotive condenser coil is good. One out of large pickup or even a truck. Make it up with one of those and mount it in front of the pulley on the air compressor so that it moves air through it and I think you'd be in good shape. If it proves to be to small you can always go and get another one. Wayne Cook Shamrock, TX http://members.dslextreme.com/users/waynecook/index.htm |
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Ignoramus19820 wrote:
I was highly impressed with use of evaporator coils for drying compressed air. I called a few HVAC contrators from yellow pages, and, unfortunately, none of them could give me anything. I would like to hear some creative ideas on where to get them. There's a huge (240 cfm) Arrow air dryer on my local craigslist (Bothell, WA) -- the seller wants $400 and would probably take $250. GWE |
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Ignoramus19820 wrote:
I was highly impressed with use of evaporator coils for drying compressed air. Can you enlighten me, please? Nick -- Motormodelle / Engine Models: http://www.motor-manufaktur.de Ellwe 2FB * VTM 87 * DLM-S3a * cubic more to come ... |
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You might consider getting a radiator, car or truck, get the size you need.
Find one that has pipes long enough to solder on connectors. "Ignoramus19820" wrote in message . .. I was highly impressed with use of evaporator coils for drying compressed air. I called a few HVAC contrators from yellow pages, and, unfortunately, none of them could give me anything. I would like to hear some creative ideas on where to get them. i |
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In article ,
Ignoramus19820 wrote: I was highly impressed with use of evaporator coils for drying compressed air. I called a few HVAC contrators from yellow pages, and, unfortunately, none of them could give me anything. I would like to hear some creative ideas on where to get them. i Don't use the evaporator. First, it's a mother****er to get out of a car or anything else; second, it can't take a lot of pressure. Instead, use the condenser--it'll be at the front of a car, right before the radiator, and it's designed to withstand up to about 4-500psi before bursting. If you pull one out of a compact car it'll even come with a 12VDC fan or two bolted on it, ready to go. Find some friends with junker cars that have failed AC systems, and ask if you can buy the components from them for a few bucks. Or go to an automotive grave yard. Hell, at the rate you're scrounging, buy a whole piece of **** car and part it out on ebay, keeping whatever you find useful. Usually the condenser will have two hoses with bolt-on flanges to attach the hoses or hard lines. Go ahead and cut out the ends of the lines and take 'em out right along with the condenser. That way you'll have them to take to an AC shop and get some lines made that you can tie into your air system. Or just braze your own fittings right onto the condenser's lines. Some Fords (and maybe Chevys--can't remember) will have what are called "spring lock" connectors. With those you need a special tool to disengage the spring so you can pull loose the lines. If you don't mind destroying them, just cut the connectors off with a tubing cutter, or dig out the spring with a pick. I think you can get new springs from auto parts stores, but check on that before you rely on it. Use some rubbing alcohol or brake cleaner and a blast of compressed air to flush out the condenser so you don't wind up with an odd aroma coming out of your air system. Nothing harmful, just a funky, unpleasant smell. You could do mass overkill: see if you can snag an outdoor condenser unit from somebody's home AC system. It's huge, comes with a fan, and handles completely absurd pressures. Of course, freebies are hard to (legally) find, and since you're up north it'll be that much harder. But if you get a chance to nab one (or even a window unit) jump. -- B.B. --I am not a goat! thegoat4 at airmail dot net http://web2.airmail.net/thegoat4/ |
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"B.B." u wrote in message
newsoNotSpamthegoat4- SNIP | Don't use the evaporator. First, it's a mother****er to get out of a | car or anything else; second, it can't take a lot of pressure. Instead, | use the condenser--it'll be at the front of a car, right before the | radiator, and it's designed to withstand up to about 4-500psi before | bursting. If you pull one out of a compact car it'll even come with a | 12VDC fan or two bolted on it, ready to go. SNIP So, what difference would there be if I were just to hang it from the wall in my garage, with some airspace around it (hell, even tilted away from the wall a bit) and let it work as a passive device? My compressor is just a 5hp with a 20 gallon tank. I've got one or two condensers from a couple cars I've parted out. How worth it is to plumb one between the compressor and the tank? I'd have to attach it to the tank somehow, but wouldn't that be more efficient than on the outlet of the tank? There would have to be a large pipe to act as a collection point, and it would be a heck of a lot easier to get to for emptying instead of reaching to the bottom and having it splatter crap all over the floor! |
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On Thu, 25 Aug 2005 01:29:04 GMT, "carl mciver"
wrote: "B.B." u wrote in message newsoNotSpamthegoat4- SNIP | Don't use the evaporator. First, it's a mother****er to get out of a | car or anything else; second, it can't take a lot of pressure. Instead, | use the condenser--it'll be at the front of a car, right before the | radiator, and it's designed to withstand up to about 4-500psi before | bursting. If you pull one out of a compact car it'll even come with a | 12VDC fan or two bolted on it, ready to go. SNIP So, what difference would there be if I were just to hang it from the wall in my garage, with some airspace around it (hell, even tilted away from the wall a bit) and let it work as a passive device? My compressor is just a 5hp with a 20 gallon tank. I've got one or two condensers from a couple cars I've parted out. How worth it is to plumb one between the compressor and the tank? I'd have to attach it to the tank somehow, but wouldn't that be more efficient than on the outlet of the tank? There would have to be a large pipe to act as a collection point, and it would be a heck of a lot easier to get to for emptying instead of reaching to the bottom and having it splatter crap all over the floor! Any method will work. But the more airflow the better it works. I support attaching to the compressor itself and let the pulley do the air flow. Keep in mind that it will produce a lot of water. You'll want to have a small tank or large piece of pipe to collect the water before your 80 gallon tank. You can also do like I have and put a NO solenoid valve in the bottom and let it be the unloader (disconnect the original). Wayne Cook Shamrock, TX http://members.dslextreme.com/users/waynecook/index.htm |
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On Thu, 25 Aug 2005 01:29:04 GMT, "carl mciver"
wrote: "B.B." u wrote in message newsoNotSpamthegoat4- SNIP | Don't use the evaporator. First, it's a mother****er to get out of a | car or anything else; second, it can't take a lot of pressure. Instead, | use the condenser--it'll be at the front of a car, right before the | radiator, and it's designed to withstand up to about 4-500psi before | bursting. If you pull one out of a compact car it'll even come with a | 12VDC fan or two bolted on it, ready to go. SNIP So, what difference would there be if I were just to hang it from the wall in my garage, with some airspace around it (hell, even tilted away from the wall a bit) and let it work as a passive device? My compressor is just a 5hp with a 20 gallon tank. I've got one or two condensers from a couple cars I've parted out. How worth it is to plumb one between the compressor and the tank? I'd have to attach it to the tank somehow, but wouldn't that be more efficient than on the outlet of the tank? There would have to be a large pipe to act as a collection point, and it would be a heck of a lot easier to get to for emptying instead of reaching to the bottom and having it splatter crap all over the floor! Do like Ingersol-Rand and most other manufactures do. Mount the condenser (after cooler ) on the guard over the fly wheel of the compressor, so the fan built into the flywheel (pump pulley) pulls air though the condenser, and pump it into the tank. The water falls out inside the tank, and is drained normally. You Can put a hose on that drain and run it outside.... Gunner "Pax Americana is a philosophy. Hardly an empire. Making sure other people play nice and dont kill each other (and us) off in job lots is hardly empire building, particularly when you give them self determination under "play nice" rules. Think of it as having your older brother knock the **** out of you for torturing the cat." Gunner |
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And to add to Gunners add a hose to the bottom exit - I'd like to add this :
1. drop the tank pressure to almost zero if not. It runs out just fine. If a little pressure exists then splatter can occur. High pressure rust isn't nice. If you do have a pressure release valve like I do on my tall tank then add a muffler/filter to the exhaust - like I did - I turn the ball valve and hear a sound but not ear splitting. It makes taking off high pressure hoses easier and in some cases safer. 2. If you run a hose - you could add an electric switch to dump it. Think Washing machine spare part - control valve with rubber hose connectors (I think it is a bleach port).. This way then allows you to press and control from a safe distance or an inside spot on a rainy or icy day and the tank needs purging. Sounds so good, I might do it. I have said value in my stores. Another concept is to use an automatic switch - maybe some water control - rain bird... Martin Martin Eastburn @ home at Lions' Lair with our computer lionslair at consolidated dot net NRA LOH, NRA Life NRA Second Amendment Task Force Charter Founder Gunner wrote: On Thu, 25 Aug 2005 01:29:04 GMT, "carl mciver" wrote: "B.B." u wrote in message newsoNotSpamthegoat4- SNIP | Don't use the evaporator. First, it's a mother****er to get out of a | car or anything else; second, it can't take a lot of pressure. Instead, | use the condenser--it'll be at the front of a car, right before the | radiator, and it's designed to withstand up to about 4-500psi before | bursting. If you pull one out of a compact car it'll even come with a | 12VDC fan or two bolted on it, ready to go. SNIP So, what difference would there be if I were just to hang it from the wall in my garage, with some airspace around it (hell, even tilted away from the wall a bit) and let it work as a passive device? My compressor is just a 5hp with a 20 gallon tank. I've got one or two condensers from a couple cars I've parted out. How worth it is to plumb one between the compressor and the tank? I'd have to attach it to the tank somehow, but wouldn't that be more efficient than on the outlet of the tank? There would have to be a large pipe to act as a collection point, and it would be a heck of a lot easier to get to for emptying instead of reaching to the bottom and having it splatter crap all over the floor! Do like Ingersol-Rand and most other manufactures do. Mount the condenser (after cooler ) on the guard over the fly wheel of the compressor, so the fan built into the flywheel (pump pulley) pulls air though the condenser, and pump it into the tank. The water falls out inside the tank, and is drained normally. You Can put a hose on that drain and run it outside.... Gunner "Pax Americana is a philosophy. Hardly an empire. Making sure other people play nice and dont kill each other (and us) off in job lots is hardly empire building, particularly when you give them self determination under "play nice" rules. Think of it as having your older brother knock the **** out of you for torturing the cat." Gunner ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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"carl mciver" wrote in message
k.net... SNIP | So, what difference would there be if I were just to hang it from the | wall in my garage, with some airspace around it (hell, even tilted away from | the wall a bit) and let it work as a passive device? My compressor is just | a 5hp with a 20 gallon tank. | I've got one or two condensers from a couple cars I've parted out. How | worth it is to plumb one between the compressor and the tank? I'd have to | attach it to the tank somehow, but wouldn't that be more efficient than on | the outlet of the tank? There would have to be a large pipe to act as a | collection point, and it would be a heck of a lot easier to get to for | emptying instead of reaching to the bottom and having it splatter crap all | over the floor! I just drug it out to see how well it flowed and to blow it out. Pretty decent condenser, but wouldn't flow near as much as the airline I was blowing out with. I could either get a second one or find a bigger one. I'll have to visit a junkyard and see what's out there. |
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In article t,
"carl mciver" wrote: "B.B." u wrote in message newsoNotSpamthegoat4- SNIP | Don't use the evaporator. First, it's a mother****er to get out of a | car or anything else; second, it can't take a lot of pressure. Instead, | use the condenser--it'll be at the front of a car, right before the | radiator, and it's designed to withstand up to about 4-500psi before | bursting. If you pull one out of a compact car it'll even come with a | 12VDC fan or two bolted on it, ready to go. SNIP So, what difference would there be if I were just to hang it from the wall in my garage, with some airspace around it (hell, even tilted away from the wall a bit) and let it work as a passive device? My compressor is just a 5hp with a 20 gallon tank. I've got one or two condensers from a couple cars I've parted out. How worth it is to plumb one between the compressor and the tank? I'd have to attach it to the tank somehow, but wouldn't that be more efficient than on the outlet of the tank? There would have to be a large pipe to act as a collection point, and it would be a heck of a lot easier to get to for emptying instead of reaching to the bottom and having it splatter crap all over the floor! If you use it passively it just won't cool as quickly or as much. It's easy enough to experiment with. Hook it all up and with the compressor pumping feel the outlet of the condenser. If it's hot you need a fan, if it's not you're OK. Either adding a fan or adding more condenser area will lower the temperature of the outlet. I would pipe it in between the compressor and the tank, so water collects in the tank and the restrictiveness of the condenser's lines isn't an issue when actually using the air--only when pumping. You could run a line from the bottom of the tank itself to a convenient place with a purge valve for the water. As long as you plumb in at the bottom of the tank it'll happily blow the gunk right through the line to wherever you want, even above the tank itself. You mentioned in your other message looking for one with better airflow. Pretty much all single-tube condensers will have thin tubing to withstand high pressures. There are some out there with parallel passages, but you'll need to be more thorough cleaning them since you can't just blow the gunk out. You'd probably need to plumb it into a parts washer and pump it out with it submerged for a few hours to make sure you clear all of the passages. (of course, if you get it out of a sealed clean AC system you can skip all of that) Or, like you said, find a second one then put 'em in parallel. -- B.B. --I am not a goat! thegoat4 at airmail dot net http://web2.airmail.net/thegoat4/ |
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On Wed, 24 Aug 2005 13:59:46 -0500, "B.B."
u wrote: You could do mass overkill: see if you can snag an outdoor condenser unit from somebody's home AC system. It's huge, comes with a fan, and handles completely absurd pressures. Of course, freebies are hard to (legally) find, and since you're up north it'll be that much harder. But if you get a chance to nab one (or even a window unit) jump. -- B.B. --I am not a goat! thegoat4 at airmail dot net http://web2.airmail.net/thegoat4/ I had one from a failed airconditioner on my house that took me 3 yrs to get rid of. I finally hauled it to the dump. Would have made a pretty decent condenser, but for that big assed 220volt fan spinning the electric meter. Gunner "Pax Americana is a philosophy. Hardly an empire. Making sure other people play nice and dont kill each other (and us) off in job lots is hardly empire building, particularly when you give them self determination under "play nice" rules. Think of it as having your older brother knock the **** out of you for torturing the cat." Gunner |
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Gunner wrote:
On Wed, 24 Aug 2005 13:59:46 -0500, "B.B." u wrote: You could do mass overkill: see if you can snag an outdoor condenser unit from somebody's home AC system. It's huge, comes with a fan, and handles completely absurd pressures. Of course, freebies are hard to (legally) find, and since you're up north it'll be that much harder. But if you get a chance to nab one (or even a window unit) jump. -- B.B. --I am not a goat! thegoat4 at airmail dot net http://web2.airmail.net/thegoat4/ I had one from a failed airconditioner on my house that took me 3 yrs to get rid of. I finally hauled it to the dump. Would have made a pretty decent condenser, but for that big assed 220volt fan spinning the electric meter. Gunner Another tank added inline works very nicely to seperate water. Doesn't cost anything to 'run'. michael |
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