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Bob, In "Most" cases, the answer is yes. The "O" ring on the plug will provide the seal. On some systems, you can leave the disk and thrust washers in and just put the plug in on top to double the disable. The latter of the two is the preferred method. There are a few valves around this will not work on though. Sorry, I do not recall off top of head which ones won't work. Check treads closely and if you detect "Any" resistance immediately stop and verify treads are the same with an appropriate gauge. Probably good idea to do this beforehand anyway. If you deal with a shop which is not oriented about overhead diving and they notice the plug, they will most likely refuse to fill them. In this case, just double or triple the disk and use original plug. Disk manufacturers have begun crimping the disk to the plugs of late which makes the old style disks hard to come by though. You can also fabricate a replacement disk from a thicker material. I have never done this one myself personally but some on the list have and will be able to provide material specifications, recommendations and engineering calculations I am sure. I once witnessed 10 cylinders burn in a boat fire and observed that 5 of 10 cylinders ruptured out the side before the disks went. Based upon this experience, I consider disks as unreliable with a random 50% failure rate. Fill system operators would be well advised to be aware of this event. Due care must also be taken not to overfill "Plugged cylinders" accidentally or risk a catastrophic failure or at the least destroy the hydrostatic characteristics of the vessel. Once I walked in on an inattentive operator taking one to 5800 before they caught it and there was a correct disk installed in the valve. As I said, unreliable. I could not get out of that shop fast enough for mental comfort.... A standard aluminum 80ft3 at 3K has the equivalent explosive force of 50 # of 50% TNT. For every one degree increase in ambient temperature , you get approximately a 10 PSI increase in vessel pressure. A raging fire can easily generate temperatures in excess of 2500 degrees Fahrenheit. The math reveals the lethal potential. Increase in explosive force is exponential. Do not store filled or partially filled cylinders in an area subject to fire or exposure to extreme heat including sunshine. One who does may get more than they bargained for. Even a disk going will turn a big weighty cylinder into a "Jumping Bean" capable of inflicting substantial damages and/or injuries if it is not secured to something. Take care whether "Plugged" or not, Sincerely, William --- Bob s <szczepanski@te*.co*> wrote: > has anyone tried replacing the burst disk with > the regulator LP port plugs? the threads appear > to be same. the LP plug does screw in. if I use > the nylon washer from the burst disk, will this > plug work? > > bob s > Some days it is just not worth gnawing through > the restraints. > > > > __________________________________________________ Do You Yahoo!? Send instant messages & get email alerts with Yahoo! Messenger. http://im.yahoo.com/ -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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