CHeap on board air.....

[RINGKONG]

pictures are self explanitory... I got the idea somewhere on line(maybe from here.:D) but can't remember where.. anyway.. thanks to them.

the rack is my own twisted creation.. it has shelves and a pull out drawer.. I hadn't installed them when I took this pic.

I got the two compressors from a U Pull it for $10 dollars a piece. They came out of late 80's early 90's caddilacs. I added a check valve to also.. it's the brass fitting on the end of the tank. the lines from the compressors are high pressure fuel line and a pvc tee. I still need to find a CHEAP adjustable pressure switch.. right now I only bring it up to 75 psi...and turn it off with the switch.

http://162.40.89.51/120/tankandcompress.jpg

Notice the cool spongebob accessories.. courtousy of fathers day :D Switches for electric fan and compressors. I used a relay with the switch.
http://162.40.89.51/120/spngbb.jpg

Notice Cool welding job on my rack for the back... NOTE TO SELF.. NEVER WELD ON Galvanized steel again.. :eek:

http://162.40.89.51/120/backtrk.jpg

[M. Lake]

What kind of pumps are those, besides caddy? what were they used for on the caddy.

[XJJPR]

FYI,

That tubing looks like EMT.

If so it is galvanized and welding it puts off some very toxic fumes. Not a good thing to do.

mark
orgs mfg

[RINGKONG]

Originally posted by Mark Hinkley
FYI,

That tubing looks like EMT.

If so it is galvanized and welding it puts off some very toxic fumes. Not a good thing to do.

mark
orgs mfg

I guess you didn't read my writing above the last pic. I know it was galvanized... I was outside.. upwind (or is it down :D) and I was holding my breath.. :D

[RINGKONG]

Originally posted by M. Lake
What kind of pumps are those, besides caddy? what were they used for on the caddy.

Air ride suspension.

[trailrunner]

you could use a pressure switch for arb,on at 85 off at 105

[RINGKONG]

Originally posted by trailrunner
you could use a pressure switch for arb,on at 85 off at 105

are they CHEAP?

[Georgia Mike]

Isn't that a pressure switch coming out of the tank on that little piece of tube? :dunno: Why don't you use that? Just run your power to one side,and hook the compressors to the other side and you have a pressure switch setup. :D

[Matthew Currie]

Another possibility for a pressure switch is to find one from an old water pump. they often turn up. You can reset it for higher pressure, or even modify the springs if you want extra pressure.

[RINGKONG]

Originally posted by Georgia Mike
Isn't that a pressure switch coming out of the tank on that little piece of tube? :dunno: Why don't you use that? Just run your power to one side,and hook the compressors to the other side and you have a pressure switch setup. :D

That is a 110v pressure switch that is non adjustable(set at 100 psi) switching 110v switches with DC current is not a good idea..

[Georgia Mike]

It doesn't matter! The only thing I would do different is use the switch in front of a pair of 30 amp relays ($5 at Radio Shack) to handle the load. The switch will indeed switch a 12 volt source. The important thing to remember is that with every drop in current,amperage is increased. For example:

A 110 volt hair dryer would normally use 4-5 amps. If you decrease the volts by 10X,you get approximately 10 times the amperage for the same hair dryer,which would make the hair dryer draw an approximate 40-50 amps @ 12 volts.

Use the toggle switch you have (which, by the way is dangerous as hell at that type of load w/o relays to begin with) and use it to energize the pressure switch. Hook the other pole from the pressure switch to the pair of relays as the trigger wire. Run a dedicated *fused* power wire to the relays as the main power source,and a ground to the closest point possible (remember--12V flows from - to +,not + to -,so make your grounds as short and large as is possible!). Hook the pumps up,one to each relay output,and you're set up!

Why are you worried that the switch is set at 100 PSI anyway? Will the pumps not pump that much air? 100 PSI is perfect for just about anything you'd ever want to run on air. You have to understand my logic,here. I'm not trying to be a jerk or anything. I'm just a firm believer in the K.I.S.S. principle :D

[RINGKONG]

Originally posted by Georgia Mike
It doesn't matter! The only thing I would do different is use the switch in front of a pair of 30 amp relays ($5 at Radio Shack) to handle the load. The switch will indeed switch a 12 volt source. The important thing to remember is that with every drop in current,amperage is increased. For example:

A 110 volt hair dryer would normally use 4-5 amps. If you decrease the volts by 10X,you get approximately 10 times the amperage for the same hair dryer,which would make the hair dryer draw an approximate 40-50 amps @ 12 volts.

Use the toggle switch you have (which, by the way is dangerous as hell at that type of load w/o relays to begin with) and use it to energize the pressure switch. Hook the other pole from the pressure switch to the pair of relays as the trigger wire. Run a dedicated *fused* power wire to the relays as the main power source,and a ground to the closest point possible (remember--12V flows from - to +,not + to -,so make your grounds as short and large as is possible!). Hook the pumps up,one to each relay output,and you're set up!

Why are you worried that the switch is set at 100 PSI anyway? Will the pumps not pump that much air? 100 PSI is perfect for just about anything you'd ever want to run on air. You have to understand my logic,here. I'm not trying to be a jerk or anything. I'm just a firm believer in the K.I.S.S. principle :D

The pressure switch CHATTERS if you use DC... trust me.. AC and DC relays and some switches are not compatible.. and this one isn't.

Who said I didn't have relays.. READ MY TOP POST AGAIN. .:rolleyes:

thanks for your informed opinion.

[Georgia Mike]

:anon: My opologies! Did not see that before! And I wasn't trying to preach,although I did. :thumbup:

[RINGKONG]

Originally posted by Georgia Mike
:anon: My opologies! Did not see that before! And I wasn't trying to preach,although I did. :thumbup:

No need to appologize... my thanks was sincere.

:D

[Georgia Mike]

Cool! Good luck with the rest of your project :D

[JEONLYEP]

I have one of those Caddie pumps, it's not fast but builds treminous pressure. I have a Square D pressure switch ($20.00) It turns off at 100 on again at 80.
http://users.ucom.net/~werwe/ysr4sale/comp1.JPG http://users.ucom.net/~werwe/ysr4sale/comp2.JPG http://users.ucom.net/~werwe/ysr4sale/comp3.JPG http://users.ucom.net/~werwe/ysr4sale/comp4.JPG

[RINGKONG]

sweet. 20 bucks for a pressure switch... niiiiiiiiiiiiiiiiiiiiiiice.

Yes they are kind a slow... but do the job. :D

[vsh]

check your original post, the pics arn't working and i would like to see them RINGKONG

cheers
-V-

[RINGKONG]

Originally posted by vsh
check your original post, the pics arn't working and i would like to see them RINGKONG

cheers
-V-

Sorry that is just my canadian filter kicking in.... it filters out anybody remotely associated with french culture......:D

Just kidding.. its back up..

[OT]

What's the model of the caddie? Looks like a great idea. I'm surprised I never thought about it.:D :D

[8Mud]

I work a bit with air and other pressurized gases and liquids. Don´t know how much pressure those pumps will produce, don´t know, if they have a built in pressure fuse. Two pressure relief valves, a pressure relief valve and a pressure switch, a pressure relief valve and a pressure fuse, even if you have to install a T fitting. At even relatively low pressures, hose, lines and tanks can go off like a bomb. At least two seperate ways to shut off/relieve the pressure. A flake of rust/paint/anti-corrosive coating, in the wrong orifice and relief valves and/or pressure switches don´t work. Don´t trust a pressure switch, to control the pressure, I´ve replaced hundreds. Run away compressors are not uncommon.
Was standing next to guy that lost an eye with 60 PSI. Tank was rated at 4-5 times that.

[ZmOz]

How long does it take the two caddy compressors to fill up a tire?


And yes...safety pressure releifs are very important. I enjoy filling 2 liter plastic pop bottles with compressed air until they pop. You would be shocked how much noise they make/damage they will do. I couldn't imagine what a metal tank would do! :eek:

[OT]

Check this out (http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2435798957&category=6755) . It must be close to the price and at least as reliable as a couple caddie compessors.

[RINGKONG]

Originally posted by rockcralwinxj
Check this out (http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=2435798957&category=6755) . It must be close to the price and at least as reliable as a couple caddie compessors.

well lets see.. $20 bucks for the two compressors.

$130 for one.. yep close in price.. :D



with out the pressure switches I do not fill it up unattended. I don't need my back in blowing up. :D

[8Mud]

Every once in a while, I´ll walk up on a pipe or tube, rated to 400 PSI or so, that looks like a hand grenade. It isn´t so much the size of the pump, as how much pressure it will build and the weakest link. A good rule, is in addition to the switch, two seperate ways to relieve pressure in a controled manner.
The OH!, chit factor sets in. Be careful.

Mudder Chuck

[OT]

well lets see.. $20 bucks for the two compressors.

Well when I posted, it was only around $60.00:doh: