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Old 06-21-2013, 09:35 AM   #51
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Re: 1990 E350 Conversion Project

you are doing a great job on this rebuild! And it is not add, it is just doing the best job you can! Well done.
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Old 06-21-2013, 01:41 PM   #52
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Re: 1990 E350 Conversion Project

Ferenzy, I'm diggin' your avatar.
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Old 06-21-2013, 10:23 PM   #53
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Re: 1990 E350 Conversion Project

Quote:
Originally Posted by Ferenzy
Quote:
Originally Posted by nat_ster
Quote:
Originally Posted by Ferenzy
once the silicone sets up, I'll tighten then SS nuts a little more and should give a nice tight seal. I got that tip from somewhere on the internet.

That is a really bad bit of info. By tightening after the silicone sets, your are breaking the Adhesion seal, and relying on compression to seal the connection.
Hi Nat,
I went back and forth with this problem for some time and did some research before my final decision. My tank is polyethylene and from everything I read and the manafacturer's website,basically nothing will stick reliably to it. So, I liked the idea of the mechanical seal keeping things tight if and when the silicone stops sticking. I guess only time will tell!
On another note, I've made good progress with the framing and actually mounted the permanent propane tank under the chasis. I'll post the pics soon.
Nat may not have been realizing you were using polyethylene, as you are 100% correct. I have worked extensively with hdpe in a previous job and yes, NOTHING adheres to it. You can buy bulkhead fittings which only use a compression seal to mount and seal. No screws or bolts.
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Old 06-22-2013, 10:47 PM   #54
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Re: 1990 E350 Conversion Project

Quote:
Originally Posted by 100MPG
you are doing a great job on this rebuild! And it is not add, it is just doing the best job you can! Well done.
Thanks 100mpg!
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Old 06-22-2013, 10:49 PM   #55
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Re: 1990 E350 Conversion Project

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Originally Posted by crazycal
Ferenzy, I'm diggin' your avatar.
Thanks crazycal, we all have to make our statement anyway we can!
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Old 06-22-2013, 11:15 PM   #56
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Re: 1990 E350 Conversion Project

Thanks for the confirmation JakeC, it's good to know I'm not losing it! I really try to plan things out and do my homework first and your comments reinforce what I've read elsewhere.

On another note, after much hemming and hawing and some sound advice from Tango, I finally settled on my propane tank. I decided to go with a single tank. It's a Manchester 11.2 gallon permanent mount, should be plenty big enough. http://www.dyersonline.com/manchester-1 ... -tank.html


The mounting went nice and smoothly.


There are four 1/2 in galvanized bolts holding it in, nice and secure. I did multiple scientific/engineering tests to make sure it was strong enough...at 175lbs I jumped up and down a few times and it didn't budge! Good enough for me!!!


Here I marked and cut out space for an access door.


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Old 12-04-2013, 11:57 AM   #57
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Re: 1990 E350 Conversion Project

how do you go about splitting the service into multiple lines? how many times can it be split? separate regulators for each?
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Old 12-07-2013, 09:08 AM   #58
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Re: 1990 E350 Conversion Project

Well, I was figuring on making a mini manifold and feeding each device from there. As far as the regulator goes I would most likely install individual ones on each line that needed it. Some devices will already have one installed in them, and wouldn't need one.
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Old 12-07-2013, 11:58 AM   #59
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Re: 1990 E350 Conversion Project

Although using a pressure regulator at each device will work just fine, I have never seen this done in any of the commercially manufactured house cars I have worked on. I suspect the main reason is that it is cheaper to use only one regulator but I'd prefer to think it was to avoid piping high pressure gas throught the vehicle for safety reasons. You might want to research each appliance as to fuel pressure and volume requirements and design a low pressure delivery system using a single regulator located very near your tank. There are also now available inline emergency cut off valves that shut down gas flow in the event of a major break in a line. You can see an example of these at HD or L's as they are now part of the flex tubing gas hook up kits they offer--once again you would need to research their sizing. Hope this helps.
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Old 12-07-2013, 12:49 PM   #60
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Re: 1990 E350 Conversion Project

Research.

When I install propane furnaces and cook tops in residential houses, we use a high pressure regulator at the tank, then a low pressure regulator at the entry to the home. from there it is split to each device that needs propane. From there cook tops have one more regulator, but hot water heaters don't. We install as per the guidelines from the company that supply's the propane.

I like the safety shut off Ol Trunt mentioned. It's one of the missing components in most propane systems.

Nat
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