Filled propane tank, no propane comes out

Hannibal wrote:
Thanks again for the enlightenment. I corrected my problem but was off a few inches on where the problem was. Hopefully this info is helpful or interesting to the OP as well. Wasn't my intention to hijack the thread.

Lots of mis-information about OPDs.
OPDs do one thing BUT need the rest of 'device' (hose) to properly work.
Each one has it's own role and built in safety components and working together make propane cylinders very safe to use.

I didn't mean to hijack OPs post either.....just try to provide good info when I read things that are a bit off the mark.

Sorry :B

Thanks again for the enlightenment. I corrected my problem but was off a few inches on where the problem was. Hopefully this info is helpful or interesting to the OP as well. Wasn't my intention to hijack the thread.

Hannibal wrote:

Old-Biscuit wrote:
Yes a ruptured pipe would cause excess flow.

But the trip device is part of the big green nut on the hose....not part of the cylinder service valve.

Here is a link to an explanation of the problem as it relates to gas grills. Our 5th wheel also has a length of hose from each tank to the regulator. The OPD in the tanks "can" trip if opened too fast or as a result of a ruptured hose (or pipe) as is explained in the post. Never heard of a trip device in the nut. The regulator also has an overflow protection circuit built in.

http://tvwbb.com/showthread.php?49713-Weber-Q-low-flame-or-no-flame

Well//
That is a nice write up, well thought out BUT completely wrong in what a propane service valve with OPD does and how it works. The poster doesn't know/understand the OPD. The 'click' he can hear is the 'ball check---excess flow device' inside the ACME nut.


Read up on what an OPD is and how it works/what it is for HERE

OPD valve is not designed to restrict flow out of the cylinder, it's only designed to stop flow into the cylinder during the filling process. OPD equipped propane cylinders will allow liquid propane into gas lines and hoses if tipped over or inverted. Overfill Prevention Devices are not a safety mechanism used or actuated during cylinder usage.

Old-Biscuit wrote:
Yes a ruptured pipe would cause excess flow.

But the trip device is part of the big green nut on the hose....not part of the cylinder service valve.

Here is a link to an explanation of the problem as it relates to gas grills. Our 5th wheel also has a length of hose from each tank to the regulator. The OPD in the tanks "can" trip if opened too fast or as a result of a ruptured hose (or pipe) as is explained in the post. Never heard of a trip device in the nut. The regulator also has an overflow protection circuit built in.

http://tvwbb.com/showthread.php?49713-Weber-Q-low-flame-or-no-flame

Hannibal wrote:

Old-Biscuit wrote:

Hannibal wrote:
Newer tanks have a ruptured pipe valve in them. I went through three tanks, two regulators and a hose with our WeberQ before I learned this. Some are more sensitive than others. Now I just barely, barely crack the valve, watch the hose tighten up like a snake for about five seconds, and then open the valve fully. It's the sudden rush of gas through the hose as it pressurizes that sets the safety valve. If it's really quiet and you crack the valve too fast, you can hear the safety valve click closed. Once closed, you'll still have enough gas in the hose to run the grill at very low flame for a few minutes before it fizzles out. This really through me for a loop. I was ready to hurl the WeberQ in the bay. I'm glad I didn't. Now that I know, it runs great.

:H
'ruptured pipe valve'??
DO you mean 'Excess flow valve'...........that is an internal component of the ACME Nut

See this post

'samsontdog'

That propane cylinder issue......
You had it filled last season. You banged it on concrete (trying to unstick OPD I take it??)

When filled do you remember if the 'liquid level bleeder' valve was opened during filling process OR did they just go by weight?
OPD Float could be jammed if cylinder was overfilled.

As suggested crack open 'bleeder' valve and let some propane out.
Do this with cylinder connected to hose that you know flows propane and then check inside RV if you get flow (cylinder service valve can be open while bleeding propane off)

CAUTION: Bleeder valve will spit liquid propane if level is normal and especially if overfilled. Use heavy gloves to protect hand.

Slow and easy......

Yes. Us old timers in the trade call them ruptured pipe valves as this scenario would definitely cause excessive flow. Thanks for the clarification.

Yes a ruptured pipe would cause excess flow.

But the trip device is part of the big green nut on the hose....not part of the cylinder service valve.

Old-Biscuit wrote:

Hannibal wrote:
Newer tanks have a ruptured pipe valve in them. I went through three tanks, two regulators and a hose with our WeberQ before I learned this. Some are more sensitive than others. Now I just barely, barely crack the valve, watch the hose tighten up like a snake for about five seconds, and then open the valve fully. It's the sudden rush of gas through the hose as it pressurizes that sets the safety valve. If it's really quiet and you crack the valve too fast, you can hear the safety valve click closed. Once closed, you'll still have enough gas in the hose to run the grill at very low flame for a few minutes before it fizzles out. This really through me for a loop. I was ready to hurl the WeberQ in the bay. I'm glad I didn't. Now that I know, it runs great.

:H
'ruptured pipe valve'??
DO you mean 'Excess flow valve'...........that is an internal component of the ACME Nut

See this post

'samsontdog'

That propane cylinder issue......
You had it filled last season. You banged it on concrete (trying to unstick OPD I take it??)

When filled do you remember if the 'liquid level bleeder' valve was opened during filling process OR did they just go by weight?
OPD Float could be jammed if cylinder was overfilled.

As suggested crack open 'bleeder' valve and let some propane out.
Do this with cylinder connected to hose that you know flows propane and then check inside RV if you get flow (cylinder service valve can be open while bleeding propane off)

CAUTION: Bleeder valve will spit liquid propane if level is normal and especially if overfilled. Use heavy gloves to protect hand.

Slow and easy......

Yes. Us old timers in the trade call them ruptured pipe valves as this scenario would definitely cause excessive flow. Thanks for the clarification.

Hannibal wrote:
Newer tanks have a ruptured pipe valve in them. I went through three tanks, two regulators and a hose with our WeberQ before I learned this. Some are more sensitive than others. Now I just barely, barely crack the valve, watch the hose tighten up like a snake for about five seconds, and then open the valve fully. It's the sudden rush of gas through the hose as it pressurizes that sets the safety valve. If it's really quiet and you crack the valve too fast, you can hear the safety valve click closed. Once closed, you'll still have enough gas in the hose to run the grill at very low flame for a few minutes before it fizzles out. This really through me for a loop. I was ready to hurl the WeberQ in the bay. I'm glad I didn't. Now that I know, it runs great.

:H
'ruptured pipe valve'??
DO you mean 'Excess flow valve'...........that is an internal component of the ACME Nut

See this post

'samsontdog'

That propane cylinder issue......
You had it filled last season. You banged it on concrete (trying to unstick OPD I take it??)

When filled do you remember if the 'liquid level bleeder' valve was opened during filling process OR did they just go by weight?
OPD Float could be jammed if cylinder was overfilled.

As suggested crack open 'bleeder' valve and let some propane out.
Do this with cylinder connected to hose that you know flows propane and then check inside RV if you get flow (cylinder service valve can be open while bleeding propane off)

CAUTION: Bleeder valve will spit liquid propane if level is normal and especially if overfilled. Use heavy gloves to protect hand.

Slow and easy......

Cbshoe may be on target. We use a lot of propane tanks here at work and this happened to one. We brought it TSC and propane dude did the same thing. Worked like a champ.

Are you sure it didn't leak out from last season when you had it filled? Can you weigh the cylinder and compare the weight with what is stamped on the cylinder, That will tell you if you do in fact have a filled tank or an empty tank.

Newer tanks have a ruptured pipe valve in them. I went through three tanks, two regulators and a hose with our WeberQ before I learned this. Some are more sensitive than others. Now I just barely, barely crack the valve, watch the hose tighten up like a snake for about five seconds, and then open the valve fully. It's the sudden rush of gas through the hose as it pressurizes that sets the safety valve. If it's really quiet and you crack the valve too fast, you can hear the safety valve click closed. Once closed, you'll still have enough gas in the hose to run the grill at very low flame for a few minutes before it fizzles out. This really through me for a loop. I was ready to hurl the WeberQ in the bay. I'm glad I didn't. Now that I know, it runs great.