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Old 09-18-2008, 03:32 PM   #29
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Doorgunner, do your original valves have any kind of manufacturer's markings on them? Also, could you post a couple of closer-up pics of the original valves with integrated sending units?
Thanks,

Lynn
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Old 09-18-2008, 04:37 PM   #30
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as requested!!

inner control panel, scale and close up of italian valve on worthington tank
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Old 09-18-2008, 05:00 PM   #31
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How it works

If you just hook up the tanks there is an immediate equalization of pressure, hardly any transfer of lp.
For transfer to happen you need to have a change in pressure, 2 changes works better.
one tank goes in the direct sun (donor tank) the other tank in the shade or cooled somehow. The greater the temp change the faster the transfer happens.Keep in mind we are working majic here. gas to fluid, and back and forth.condensation, etc
Here are some #'s I got from the propane institute.
First # outside temp/Vapor pressure PSI.
20F/42PSI--30F/53PSI--40F/65PSI--50F/78PSI--60F/93PSI--70F/110PSI--
80F/128PSI--90F/150PSI--100F/177PSI--110F/204PSI
Are you pickin up what I'm puttin down??
If you don't "get "this or are the kind of person that can get both their hands caught in a vise then PLEASE forget all about this thread.
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Old 09-18-2008, 07:26 PM   #32
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Fascinating

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Old 09-18-2008, 07:53 PM   #33
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Fascinating

Hmm.. I wonder if you put Mr. Spock in the sun, flipped him upside down, put someone in the shade upright, wrapped them in a cold towel, and put the Vulcan Mind Meld on them...........
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Old 09-18-2008, 07:56 PM   #34
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Would the person standing upright turn into Mr. Spock. Is that the question?
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Old 09-18-2008, 09:06 PM   #35
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So um a well canadiens aren't smart enough to refill cylinders? I hope this to be a isolated incident- Shack- as I like the "Great White North". You do a lot of "diving" at the dump?
DG
I was the Canadian showing the operator in New York how to fill the tank.
And yes, you wouldn't believe what people toss out at the dump. I got an up to date propane tank with OPD valve there.
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Old 09-19-2008, 12:37 AM   #36
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For transfer to happen you need to have a change in pressure, 2 changes works better.
one tank goes in the direct sun (donor tank) the other tank in the shade or cooled somehow. The greater the temp change the faster the transfer happens.
Which one goes in the Sun, again? Ooops!


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Old 09-19-2008, 06:28 AM   #37
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Would the person standing upright turn into Mr. Spock. Is that the question?
Seems "logical".
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Old 09-19-2008, 09:59 AM   #38
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You guys are spending way too much time in the "Holodeck". Come back to reality!
So when those of you nay sayers are out of selenium crystals and come begging at my door for some--- guess what. Scotty's on break right now.
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Old 09-19-2008, 12:19 PM   #39
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Don't get caught transporting a refilled 'disposable' cylinder. DOT takes serious actions AFTER the fact if an incident occurs.

Also... indulge me a bit of story telling?

Fifteen below Zero. One dry-walled room in a steel shed. 11pm Friday night after a long week and a 120 mile drive to the country property.

Need to light fire ASAP, Pot-Belly coal stove. Figure to use propane torch easiest short cut. Find kit, assemble torch, lay kindling bed and wood fire in hopes to start huge-chunk coal fire from the ton of coal I knew was frozen into rock hard mass on north side of steel building. Fire lit.

Go outside to get coal, obtain precious few huge chunks, boogie back inside (leaving door open with hands full) and break a chunk into smaller ones, place in wood fire, add more wood, put large chunks in. Turn and pick-up torch, unscrew torch head toward reassembling kit box for next time.

Valve fails in cold. Five-foot plume of propane rocketing out of cylinder EIGHTEEN inches from roaring coal stove. Hail-Mary spastic backwards sidearm toss while flinching moved cylinder rocketing towards door. Cylinder finds dark spot twenty feet away at far end of room and disappears into the night. Follow cylinder out door. Freeze for five minutes waiting for building to go boom.

Not worth playing with disposable cylinders, the seals are made for only a few uses. Yes sure, the cold amplified the hazard, but who is to say if it could not happen again on a nice sunny day at a camp spot turned into a picnic for ophans hosted by nuns.

Get a 5-pound or 11-pound mini-cylinder with internal needle valve and the usual style fittings.
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Old 09-19-2008, 12:28 PM   #40
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Doorgunner,

After all the kidding is done, I can appreciate what you did. You had a problem. Technical solutions such as a like kind instrumented valve replacement - not available. Finding someone capable AND willing to fill the existing tanks - not available. Finding a way to to do it yourself - priceless. Height difference in the presence of gravity, pressure difference in a closed system, and temperature difference to maintain the pressure difference are all simple and consistent laws of physics applicable to moving liquid from one location to another. I also appreciate your willingness to share it with us (whether believers or not). The next time I'm looking to have automatic weapons fired from my side door, you're the kind of gunner I'm looking for. The kind that will find a way to get the job done.

Roy
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Old 09-19-2008, 01:05 PM   #41
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Originally Posted by Wabbiteer View Post
Don't get caught transporting a refilled 'disposable' cylinder. DOT takes serious actions AFTER the fact if an incident occurs.

Also... indulge me a bit of story telling?

Fifteen below Zero. One dry-walled room in a steel shed. 11pm Friday night after a long week and a 120 mile drive to the country property.

Need to light fire ASAP, Pot-Belly coal stove. Figure to use propane torch easiest short cut. Find kit, assemble torch, lay kindling bed and wood fire in hopes to start huge-chunk coal fire from the ton of coal I knew was frozen into rock hard mass on north side of steel building. Fire lit.

Go outside to get coal, obtain precious few huge chunks, boogie back inside (leaving door open with hands full) and break a chunk into smaller ones, place in wood fire, add more wood, put large chunks in. Turn and pick-up torch, unscrew torch head toward reassembling kit box for next time.

Valve fails in cold. Five-foot plume of propane rocketing out of cylinder EIGHTEEN inches from roaring coal stove. Hail-Mary spastic backwards sidearm toss while flinching moved cylinder rocketing towards door. Cylinder finds dark spot twenty feet away at far end of room and disappears into the night. Follow cylinder out door. Freeze for five minutes waiting for building to go boom.

Not worth playing with disposable cylinders, the seals are made for only a few uses. Yes sure, the cold amplified the hazard, but who is to say if it could not happen again on a nice sunny day at a camp spot turned into a picnic for ophans hosted by nuns.

Get a 5-pound or 11-pound mini-cylinder with internal needle valve and the usual style fittings.

AMEN! Those disposable cylinders ARE useful if you're hiking, etc. But they are wastefully expensive when used on a regular basis. I also like the idea of simply using a flex hose and hooking up to the tank on your trailer.

Paula
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Old 09-24-2008, 09:51 AM   #42
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Strangely enough, I bought a 20 pound OPD tank with gauge from Camping World. I wonder if there is a way to transfer the gauge stuff, or just buy the gauge stuff outright? It would save a lot of grey hair. And yes, I got it so we didn't go through a hundred little disposable bottles for our grill.
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