Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 15-09-2016, 04:44   #1
Registered User

Join Date: Jul 2006
Location: Underway in the Med -
Boat: Jeanneau 40 DS SoulMates
Posts: 1,762
Images: 1
American Propane Tank Air Release Value

does any one have an idea on how to open the air release value on the American propane tanks without what appears to be a special tool
we have in the past gotten our tanks filled using gravity feed but now in Romania they use a lot of pressure and will not sell us just the gas in a bottle to return the bottle later - I have to buy bottle and all

we have all the adaptors and got to a filling station only to be stymied by the air release value - one tank is a 5 star fitting and the fiberglass one is like a head of a screw with only 2 sides and indented so I can not get anything around it -

any thoughts would be appreciated
__________________

__________________
just our thoughts and opinions
chuck and svsoulmates
wintering over in Kusadasi Turkey
chuckr is offline   Reply With Quote
Old 15-09-2016, 06:50   #2
Registered User

Join Date: Jun 2007
Location: SW Florida
Boat: FP Belize, 43' - Dot Dun
Posts: 3,161
Re: american propane tank air release value

I thought it was just a flat blade screwdriver....
__________________

__________________
DotDun is online now   Reply With Quote
Old 15-09-2016, 07:04   #3
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 14,003
Re: american propane tank air release value

I thought those were over pressure relief valves ?
As a kid I drove forklifts and we bulk filled our own tanks, opened the release valve and let the gas escape until liquid came out, then closed the valve, but I did not think regular bottles had those release valves on them?
__________________
a64pilot is offline   Reply With Quote
Old 15-09-2016, 07:11   #4
Registered User

Join Date: Jun 2007
Location: SW Florida
Boat: FP Belize, 43' - Dot Dun
Posts: 3,161
Re: american propane tank air release value

The liquid can't go in unless the gas comes out....
__________________
DotDun is online now   Reply With Quote
Old 15-09-2016, 07:24   #5
Registered User

Join Date: Jul 2006
Location: Underway in the Med -
Boat: Jeanneau 40 DS SoulMates
Posts: 1,762
Images: 1
Re: american propane tank air release value

ok - I think I know the problem after a bit of internet research - we hooked the tank up to their system to fill and they have them all over the city as cars run on lpg - so when they started to pump it cut off as filled - so need to get air out - so opened bleed value and tried and some gas escaped - they cut it off -
problem is we are trying to transfer under high pressure and it is all gas - if we could use low pressure and cool the receiving tank it would turn to liquid and we could open bleed value and let air out - right now just want to get to Turkey where they know how to do this - maybe in Bulgaria but I doubt it - I could get another tank but they are way to large to store
I could get another tank and transfer but marina may not be too happy with that - need a gas dealer as in Romania all gas is at a public downtown station and they will not allow a transfer -
so a problem
__________________
just our thoughts and opinions
chuck and svsoulmates
wintering over in Kusadasi Turkey
chuckr is offline   Reply With Quote
Old 15-09-2016, 07:25   #6
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 14,003
Re: american propane tank air release value

You sure you are not trying to put in CNG? Sure sounds like it.
I think CNG would blow a propane tank up right away, and its been years bit I think they ran cars off of CNG when I was in Europe and not propane?
__________________
a64pilot is offline   Reply With Quote
Old 15-09-2016, 07:27   #7
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 14,003
Re: american propane tank air release value

Quote:
Originally Posted by DotDun View Post
The liquid can't go in unless the gas comes out....
It can if, liquid is being pumped in at a pressure higher than what it takes to liquefy the gas, but if your trying to transfer from one tank to another either the receiving tank has to be cold, or you have to let the vapor escape, to fill the fork lift tanks, we let the pressure escape

On edit some tanks have a vapor return valve where the vapor is returned during filling, but I think this is required only on very hot days on bigger household tanks that sit out in the sun?
__________________
a64pilot is offline   Reply With Quote
Old 15-09-2016, 07:52   #8
Sponsoring Vendor
 
HopCar's Avatar

Community Sponsor
Cruisers Forum Supporter

Join Date: May 2011
Location: Miami Florida
Boat: Ellis Flybridge 28
Posts: 2,905
Re: american propane tank air release value

When you say very high pressure how high are you talking about? Propane turns to liquid at less than 200 psi.
As A64 pointed out, it sounds like you're playing with CNG which stays a gas at very high pressures and needs tanks like scuba tanks to contain it.
__________________
Hopkins-Carter Marine Supplies & Fishing Tackle
What You Need, at the Price You Want...with Service!
HopCar is offline   Reply With Quote
Old 15-09-2016, 08:18   #9
Senior Cruiser
 
Cheechako's Avatar

Cruisers Forum Supporter

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 18,140
Re: american propane tank air release value

It's a flat blade screwdriver.
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard











Cheechako is offline   Reply With Quote
Old 15-09-2016, 08:25   #10
Registered User
 
TacomaSailor's Avatar

Join Date: Nov 2012
Location: San Diego
Boat: Caliber 40
Posts: 1,119
Re: american propane tank air release value

Why are you doing anything with the valve?

I've never been to a LPG or CNG fill facility that allowed the customer to operate the equipment.
__________________
TacomaSailor is offline   Reply With Quote
Old 15-09-2016, 10:22   #11
Registered User

Join Date: Sep 2013
Location: San Francisco Bay
Boat: Chung Hwa Boat Builders, Magellan 36
Posts: 182
Re: american propane tank air release value

As Cheechaco said it's a flat blade screw driver. I just had mine filled 4 days ago and always watch. Propane is pressurized to about 250 psi, cng to about 3600psi! No room for error here!
__________________
foufou is offline   Reply With Quote
Old 15-09-2016, 12:53   #12
Registered User
 
Cadence's Avatar

Join Date: Dec 2008
Location: SC
Boat: None,build the one shown of glass, had many from 6' to 48'.
Posts: 5,060
Re: american propane tank air release value

I would have to agree with Hopcar. They may be supplying CNG.
__________________
Cadence is offline   Reply With Quote
Old 15-09-2016, 13:45   #13
Registered User

Join Date: Dec 2015
Posts: 133
Re: american propane tank air release value

That's not true ! The pressure of any vessel containing propane is determined by the temperature of it's contents. Connect any two vessels containing Propane and the warmer contents will always freely flow into the vessel with the cooler temperature. No if's and's or but's about it.
__________________
Rorzech is offline   Reply With Quote
Old 15-09-2016, 13:53   #14
Registered User

Join Date: Dec 2015
Posts: 133
Re: american propane tank air release value

A sure way to open the relief valve is to ram 25 lbs of liquid propane into a 20 lb tank and leave it out in the hot sun for an hour or two. It won't be long before you see liquid propane squirting out of that relief valve just like it's supposed to all on its own. That's why they usually have people with licenses operating tank filling depots.
__________________
Rorzech is offline   Reply With Quote
Old 15-09-2016, 15:10   #15
Registered User

Join Date: Jan 2011
Location: Sydney
Boat: Farr 1020
Posts: 170
Re: American Propane Tank Air Release Value

To clarify the gas type:
CNG - essentially methane, used for converting a Diesel engine to gas. Lower calorific value than propane etc.
LPG - some sort of mixture between propane and butane is for converted petrol engines. It varies depending on the field it comes from and thus the country. Poms have a choice of Red (propane) or Blue (butane) or is that green - Blue is the Camping Gaz which is a different proportion.
So country by country, it will vary
__________________

__________________
Djarraluda is offline   Reply With Quote
Reply

Tags
lease, propane

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Insurance policies: agreed value or actual cash value? mnackerman General Sailing Forum 17 16-06-2016 07:51
Boat Insurance: Agreed Value vs Actual Cash Value Policies Robertson Dollars & Cents 19 04-02-2013 14:13
Getting American Propane Tank Filled in Italy gilbdc Electrical: Batteries, Generators & Solar 0 27-08-2012 06:34
Propane Tank Value Upgrade AuroraGH Plumbing Systems and Fixtures 4 21-02-2012 09:43


Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:13.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.