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    Forums    Tech Talk    Propane, Liquid Petroleum, or LP "Leak Detector" shut off safety valve
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Propane, Liquid Petroleum, or LP "Leak Detector" shut off safety valve
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Supporting Member of Barthmobile.com 8/16
Picture of Kevin
posted
Most of the motor homes and campers we know here as Barthmobiles have a Liquid Petroleum (LP) or Propane gas system for various reasons. LP furnaces, LP hot water heaters, LP generators, LP refrigerators, and LP stoves, just to name the few I know of.
In the LP system is a LP leak detector. It will shut of the LP gas and awake you if you are sleeping with an annoying beep. I am posting my experience with my LP safety leak detector to show how well it functions. It also detects other gasses.


Last year while my second home, The Barth Regency was parked in my garage next to the dump this is what happened.
I was doing fiberglass work on the Dump truck body. Next morning the LP detector was going off in the Barth. The LP detector would not reset. I opened my overhead door and tried to reset it again. The fresh air enabled me to reset the LP leak detector. Apparently the LP leak detector did not like the fumes from the fiberglass resin setting up. It surprised me that the gas from the fiberglass resin was setting off the LP leak detector.
Last week I put the summer car in storage and brought the battery home. I put the battery on the charger. The charging battery was near the Barth in the garage. Next morning the LP leak detector was going off in the Barth. Apparently the gas from the battery charging set off the leak LP leak detector.
The 25+ year old LP leak detector will detect other gas, that may not be good for us to breathe.
It will work for LP leaks too. The pilot went out on the stove one evening while camping. We were awakened to the annoying beep, shortly after we fell a sleep.
Great peace of mind, so if your LP leak detector won't, reset, it is not broken, it just senses some other harmful gas.
 
Posts: 2625 | Location: Northeast , Ohio | Member Since: 07-29-2012Reply With QuoteReport This Post
Picture of L78steve
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I guess you leave the detector switch on all the time?
If you do the gas valve is open all the time.


1990 34 Regency WB
3208 300HP

1993 34 Regency WB
8.3 Cummins 300HP
 
Posts: 139 | Location: Hendersonville NC | Member Since: 02-02-2016Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 8/16
Picture of Kevin
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Steve there is a switch for the gas valve also. Sometimes I run the refrigerator on the gas mode. Gas valve leak detector is on all of the time. If the heat in the garage would stop working The Barth furnaces would protect the Barth from freezing. I do not winterize.
I was surprised to have the leak detector shut the gas off from other fumes. Do you think the older leak detector is more of a lack of oxygen sensor than a leak detector?
 
Posts: 2625 | Location: Northeast , Ohio | Member Since: 07-29-2012Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 9/17
Picture of Duane88
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Geez!! All this fancy stuff in the Big Barths, I am lucky to have tires!!!


25 Ft Glassnose, 2792, 1982
454 Engine
Plain Jane Interior
Original Paint
Fire light Picture by Kevin, GTG 2017 Ohio
 
Posts: 207 | Location: Clinton Iowa | Member Since: 04-02-2017Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
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Detectors vary based on the desired gas used.

Many detectors for flammable gas use a catalytic surface and an infrared sensor. In the presence of a catalyst the flammable gas will react with oxygen at room temperature. The resulting low level combustion reaction produces heat which the infrared sensor detects and sets off alarm. Depending on the catalalyst the detector may function with many flammable organic gases, ie paint fumes, solvents. For overall fire and explosion protection a broad band sensor is ideal, ie not just gas leaks but any flammable gas will trigger it.

OTOH sometimes we want a more specific detector. Carbon monoxide for instance. Carbon monoxide is flammable and may trigger some gas sensors. (Carbon monoxide is both flammable AND poisonous.)

Dedicated CO detectors today use more specific detectors based on electrochemical "fuel cell" technology, to avoid the false alarms with the other types.

The ultimate sensors are based on gas chromatography and can detect parts per billion of each gas in some cases. Lab stuff.

Final comment: Our coach gas detectors are catalytic and as such, can be "poisoned" like the catalytic convertors in cars. Normally,lead, heavy metals, etc but also possible with welding fumes from normal metals, and sulfur gases. Exposure can ruin the dectector.


8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3252 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 8/16
Picture of Kevin
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quote:
Originally posted by Steve VW:
Detectors vary based on the desired gas used.


Final comment: Our coach gas detectors are catalytic and as such, can be "poisoned" possible with welding fumes from normal metals, and sulfur gases. Exposure can ruin the dectector.


Lucky for me the coach was closed up while I was welding the frame rails in last year. Good knowledge you have shared here. Thank you Steve VW.
 
Posts: 2625 | Location: Northeast , Ohio | Member Since: 07-29-2012Reply With QuoteReport This Post
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quote:
Originally posted by Duane88:
Geez!! All this fancy stuff in the Big Barths, I am lucky to have tires!!!


I'm lucky you didn't steal my wheels! Smiler
 
Posts: 146 | Location: Lancaster, PA | Member Since: 09-06-2016Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
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I have to disable my gas detector every time I eat spicy food... confusion nono

I can't use those "stud finders" for construction either... they just keep going off for some reason... ROTFLMAO


8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3252 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 9/17
Picture of Duane88
posted Hide Post
I'm lucky you didn't steal my wheels! Smiler[/QUOTE]


I was going too, Emma had peed on them..


25 Ft Glassnose, 2792, 1982
454 Engine
Plain Jane Interior
Original Paint
Fire light Picture by Kevin, GTG 2017 Ohio
 
Posts: 207 | Location: Clinton Iowa | Member Since: 04-02-2017Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 7/17
Picture of Steve VW
posted Hide Post
ROTFLMAO ROTFLMAO ROTFLMAO


8607-3346-33TFPOB------9708-M0037-37MM-01
86 Regal SE 33 Tag axle--"98" Monarch 37
Chev P3(7) 454TBI--------Cummins 8.3 300 hp
400 hp fuel injected-------6 spd Allison, Spartan MM
 
Posts: 3252 | Location: Kalkaska, MI | Member Since: 02-04-2011Reply With QuoteReport This Post
Supporting Member of Barthmobile.com 10/08
Picture of MWrench
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I have the propane leak detector BUT it isn't connected to the tank in any way. Just functions as an alarm, will not shut off anything. Found no evidence that it ever was connected, no valves at the tank. Don't know if this is because I have a gas line AND a liquid line coming out of the tank.

I do have a rupture valve in the liquid line but soon I will replace as it is very old and I am unsure it even works.

Would like to replace the generator with a diesel powered unit but so far I haven't found one for a reasonable price.


Ed
94 30' Breakaway #3864
30-BS-6B side entry
230 Cummins, Allison 6 speed
Spartan chassis
K9DVC
 
Posts: 1897 | Location: Los Gatos, CA | Member Since: 12-08-2005Reply With QuoteReport This Post
Picture of L78steve
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quote:
Originally posted by MWrench:
I have the propane leak detector BUT it isn't connected to the tank in any way. Just functions as an alarm, will not shut off anything. Found no evidence that it ever was connected, no valves at the tank. Don't know if this is because I have a gas line AND a liquid line coming out of the tank.

I do have a rupture valve in the liquid line but soon I will replace as it is very old and I am unsure it even works.

Would like to replace the generator with a diesel powered unit but so far I haven't found one for a reasonable price.


The detector has a 12V positive wire going to a gas shut off valve on the gas line. Not on the tank.
Its purpose is to shut down the gas flow in case a leak is detected.


1990 34 Regency WB
3208 300HP

1993 34 Regency WB
8.3 Cummins 300HP
 
Posts: 139 | Location: Hendersonville NC | Member Since: 02-02-2016Reply With QuoteReport This Post
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    Forums    Tech Talk    Propane, Liquid Petroleum, or LP "Leak Detector" shut off safety valve

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