Forum Discussion
Old-Biscuit
Dec 07, 2013Explorer III
sleepy wrote:abslayer wrote:
So sleepy Hmmm did not know that so what I said can not happen right no fire??
I tried opening a propane bottle all the way to empty the cylinder... I couldn't get the propane out that way. The tanks before the ORP valves would empty so fast that they'd frost up.
I'm guessing here:
I think the real danger of explosion / fire is a slow leak that alows the propne to build up in a closed area... then a spark or flame
Be good to have an expert chime in.
There are a several safety features on cylinders.
The OPD (Overfill Protection Device) valve has a couple.
Shuts off filling of cylinder at 80% capacity and has a spring loaded shutoff valve that is closed when cylinder is disconnected OR if thermal bushing in pigtail connection should melt due to fire.
The pigtail connection (Acme Nut) has the thermal bushing AND a check valve (ball that moves) that will close if excess flow occurs due to line break etc. The 'ball' can close if propane cylinder is valved in too fast....it floats stationary in the middle due to equal pressure on both sides of ball. Open too fast and it moves to one side closing off because of high pressure on one side/low pressure on other side.
The ACME nuts (big green right hand thread) have been mandated since 1998
The OPD valves since 2001
About Travel Trailer Group
44,029 PostsLatest Activity: Jan 28, 2025