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03-25-2016, 05:16 AM
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#1
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,167
M.O.C. #6433
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That Red Regulator Valve
The subject of the red regulator valve failure has come up often in the past. (Do they still put those on the new Montes?) Some have replaced them. Some have eliminated them. Many have questioned the purpose. Well, I found out. Someone on another forum posted a requirement by the National Fire Protection Association (NFPA) relating to the subject. And since I was once a member on two different NFPA committees I am still able to access all their standards and able to verify it. But here is what the NFPA 1192 Standard on Recreational Vehicles says:
"5.3.11.2 Propane system pressure shall be regulated to a pressure of 30 psi (207 kpa) or less within 60 in. (1.5m) of the container outlet."
So it appears that if the distance from the street side tank to the dual stage change over regulator on the opposite side is greater than 60 inches, that red regulator is required. Since all the trailers are much wider than 60", I would assume it would apply to all that have the two tanks installed on opposite sides of the trailer with the dual stage change over valve on one side. Note that propane tank pressure can be over 200 psi, so that could be over 200 psi across the piping from one side to the other without the red regulator.
Just an FYI and food for thought.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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03-25-2016, 07:47 AM
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#2
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,701
M.O.C. #12947
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That's good to know. I have also read, that because the pressure would be the same in the cross over pipe as in the tank, without the regulator, that the gas could re-liquify.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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03-25-2016, 11:19 AM
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#3
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Montana Master
Join Date: Jan 2005
Location: North Ridgeville
Posts: 20,229
M.O.C. #2839
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Good information...
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03-25-2016, 02:50 PM
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#4
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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Thanks for sharing!
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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03-26-2016, 06:15 AM
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#5
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Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,707
M.O.C. #7992
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Thanks for posting the regulation. Like most regulations I wonder what is magical about 60" versus 96". Jim
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2006 3000RK
2009 Ram 2500
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03-26-2016, 06:27 AM
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#6
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Montana Fan
Join Date: Jan 2016
Location: Lima
Posts: 138
M.O.C. #18168
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Good to know why.
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03-26-2016, 08:17 AM
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#7
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,167
M.O.C. #6433
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Quote:
quote:Originally posted by jimcol
Thanks for posting the regulation. Like most regulations I wonder what is magical about 60" versus 96". Jim
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Not having been on that committee, I can't even speculate on the why that number. I can only tell you the process. It is not just a number someone pulled out of the air. The individual NFPA committees for all the NFPA standards/codes (of which there are about 100) are made up of 20, plus or minus, unpaid volunteers working for companies in some way related to the scope of that standard/code. The members work in multiple facets of the industry including design, engineering, manufacturing, insurance carriers, etc., and so have different perspectives and ideas about the requirements. That balance prevents the committee from leaning toward any one particular interest. In addition, much of the content of the standards/codes comes from the general public, again primarily from those working in the related industry in some form or fashion. Each new or revised requirement is incorporated into a preliminary issue of the standard/code by the committee. That issue is then submitted for public review and comment. And comments from the public are subsequently reviewed, discussed, sometimes cussed, voted on, and either implemented, implemented with changes, or rejected. Then it is again submitted for public review and comment, and the committee review process is repeated one last time before the newest issue with revisions is released as final. And this cycle is repeated every 4-5 years.
So basically what I am saying, is that the requirements are actually developed by people who are actively engaged in that industry, rather than someone sitting in their office generating requirements just to justify their existence. Novel idea, huh?
Note that the National Electric Code is actually one of those created and maintained by the NFPA.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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03-26-2016, 01:27 PM
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#8
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Montana Master
Join Date: Dec 2007
Location: Kansas City, Missouri
Posts: 2,707
M.O.C. #7992
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Thanks for your thoughtful and detailed reply.
Quote:
quote:Originally posted by BB_TX
Quote:
quote:Originally posted by jimcol
Thanks for posting the regulation. Like most regulations I wonder what is magical about 60" versus 96". Jim
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Not having been on that committee, I can't even speculate on the why that number. I can only tell you the process. It is not just a number someone pulled out of the air. The individual NFPA committees for all the NFPA standards/codes (of which there are about 100) are made up of 20, plus or minus, unpaid volunteers working for companies in some way related to the scope of that standard/code. The members work in multiple facets of the industry including design, engineering, manufacturing, insurance carriers, etc., and so have different perspectives and ideas about the requirements. That balance prevents the committee from leaning toward any one particular interest. In addition, much of the content of the standards/codes comes from the general public, again primarily from those working in the related industry in some form or fashion. Each new or revised requirement is incorporated into a preliminary issue of the standard/code by the committee. That issue is then submitted for public review and comment. And comments from the public are subsequently reviewed, discussed, sometimes cussed, voted on, and either implemented, implemented with changes, or rejected. Then it is again submitted for public review and comment, and the committee review process is repeated one last time before the newest issue with revisions is released as final. And this cycle is repeated every 4-5 years.
So basically what I am saying, is that the requirements are actually developed by people who are actively engaged in that industry, rather than someone sitting in their office generating requirements just to justify their existence. Novel idea, huh?
Note that the National Electric Code is actually one of those created and maintained by the NFPA.
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__________________
2006 3000RK
2009 Ram 2500
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06-05-2016, 05:30 PM
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#9
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Montana Master
Join Date: Jun 2010
Location: Colorado Springs
Posts: 3,335
M.O.C. #10496
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Excellent insight into the process. Thanks!
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2010 3150RL
LevelUp, Dual 6 volt batteries, Progressive Industries EMS HW50C, Honda EU2000i Generator, Bridgestone Duravis R250 tires, Torklift Glowstep Revolution Stairs, LED Tail lights
2015 RAM 3500 Laramie SRW LB CC Cummins 6.7L Aisin Trans B&W RVK3600
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