Reply
 
Thread Tools Display Modes
Old 10-25-2010, 04:04 PM   #11
The Old Man
 
Willis's Avatar
 
Join Date: Jun 2010
Location: Huntersville, NC
Posts: 330
Propane must turn to gas from its liquid form to be usable in an RV system. As the liquid turns to gas it forms vapor pressure within the tank. In cold temperatures the conversion process is less efficient. Thus lower than normal vapor pressure will result from either colder temps or lowered levels of liquid propane in the tank. If both of these factors exist the effect will be compounded. This lower pressure contributes to excessive release of water vapor present in the propane which can freeze when it hits the valves or regulator.
__________________

__________________
2010 Flagstaff 829RGSS

Still to go: AK, NL, NT, NU, YT
Willis is offline   Reply With Quote
Old 10-25-2010, 05:12 PM   #12
Senior Member
 
jimh's Avatar
 
Join Date: Jul 2010
Location: Lake Charles, La.
Posts: 1,531
i would replace the reg more as a safety issue....what if it stuck open. it could put between 50 and 100 lbs pressure on orifaces designed for proper flow at a few oz.
check out MSDS for propane PROPANE MSDS
__________________

__________________
jimh is offline   Reply With Quote
Old 10-26-2010, 12:36 AM   #13
Villa Estate 392FLFB
 
The_Stuff's Avatar
 
Join Date: Aug 2010
Location: Saskatchewan, Canada
Posts: 1,085
i found out everything from my 88 plymouth voyager thats ex CFB moosejaw's experimental vehicle that was on propane.
__________________
One state/province at a time!
Full Timing - Salem Villa Estate - 392FLFB - Purchased July 29th 2010
The_Stuff is offline   Reply With Quote
Old 10-27-2010, 10:37 PM   #14
Senior Member
 
Join Date: Aug 2009
Location: New Mexico
Posts: 201
I have had dealer tell me sometime they have had problem with there load . I have had to call the dealer out for emergency generator set that had freezing regulator. that they change out.
__________________
2010 wildcat 31ts
05 Ford F350 SD PS
camprat is offline   Reply With Quote
Old 10-29-2010, 02:09 PM   #15
Senior Member
 
jimh's Avatar
 
Join Date: Jul 2010
Location: Lake Charles, La.
Posts: 1,531
more than likely, if the reg stuck open, it would rupture the diaphram, after a short pressure burst. the propane would probably vent to atmos instead of overpressuring the system. i guessing, i would suspect there is some safe guard built it in case of a failure.
i would suspect any freezing to occure on the atmospheric side of the diapharm. there shouldn't be anything in the propane to cause freezing.

if u request a MSDS where ur buying ur propane, it will tell u for sure what ur getting. whoever sells it to u is required to have an MSDS sheet. look for the purity. it should be somewhere around 99% min. If someone is blending it for use as a motor fuel, the % will be disclosed in the MSDS. When it leaves the refinery, it is 99%+ pure.
__________________
jimh is offline   Reply With Quote
Old 10-29-2010, 09:52 PM   #16
Senior Member
 
Join Date: Aug 2009
Location: New Mexico
Posts: 201
Most of the regulator have a screen in them to keep form damaging the reg, but this where the ice builds up to & can plug up. Like Willis said. I would agree with you about MSDS & 99% pure if this was a perfect world. But we are getting vary % of purity of propane. When I have had my problem was coming out of summer with propane left over & going in to fall winter. Why ? Would be nice if anyone else has had this problem post it.
__________________
2010 wildcat 31ts
05 Ford F350 SD PS
camprat is offline   Reply With Quote
Old 10-30-2010, 08:46 AM   #17
Senior Member
 
jimh's Avatar
 
Join Date: Jul 2010
Location: Lake Charles, La.
Posts: 1,531
possible explamation for the propane giving more problem with freeze up at a lower level than a full bottle is as the propane evaporates, it reduces the temp of the liquid. the amt of liquid in contact with the tank is less so is unable to keep the liquid warm. the lower the level gets, the colder it gets. the colder the gas entering the reg, the colder the gas after the pressure drop in the reg.
i'm having a problem with water being in the propane. an easy way to see if it is water is (if the outside temp is in the 20's) to shut off the system for abt 30 minutes. propane will evaporate and all will work again. water will remain frozen.
when manufactured, we had strict specs for moisture, purity, and sulfur just to be able to sell it. off spec had to be reprocessed or sold at a reduced price to someone that used it in their process.
i know that if u get a leak in a liquid propane line, it will ice over so the temp can drop quiet a bit in the transformation from liquid to gas.
what happens in the handling of the propane beyond the refinery isn't something i'm firmiliar with. would be equivlent to me saying that gasoline doesn't have water in it leaving the refinery and someone gets a tank full of water at the gas station. both statements can be true.
i can say that propane left us on spec. what it goes thru beyond us i can't say.
i live in the deep south. we don't have that many days where it drops below abt 26 and then it is only for 6 hrs or less. i did use propane at home to dry clothes and never experienced icing of the reg. could be that the volumn of liquid propane didn't get cold enough to cause the extra cooling at the reg.
__________________
jimh is offline   Reply With Quote
Old 10-30-2010, 01:50 PM   #18
Villa Estate 392FLFB
 
The_Stuff's Avatar
 
Join Date: Aug 2010
Location: Saskatchewan, Canada
Posts: 1,085
if the regulator is exposed to wind that plays a factor to. try wrapping a towel around it.
__________________
One state/province at a time!
Full Timing - Salem Villa Estate - 392FLFB - Purchased July 29th 2010
The_Stuff is offline   Reply With Quote
Old 10-31-2010, 08:07 AM   #19
Senior Member
 
jimh's Avatar
 
Join Date: Jul 2010
Location: Lake Charles, La.
Posts: 1,531
if this is the reg that switches the tanks, try switching the tanks. the warmer (relatively speaking) propane may solve ur problem.
__________________
jimh is offline   Reply With Quote
Old 10-31-2010, 09:58 PM   #20
Senior Member
 
Join Date: Aug 2009
Location: New Mexico
Posts: 201
What work sometime is just warm water over regulator & then switch.
__________________

__________________
2010 wildcat 31ts
05 Ford F350 SD PS
camprat is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 12:39 AM.