Steel Bouyancy Characteristics

[Diverl]

I have been looking at steel cylinders from many different sales outlets and several of the online stores. There seems to be a big discrepency between what the sales people are telling me and other publication sources say regarding bouyancy characteristics. Which is correct?

divers supply - faber 95 is -4.4 lbs full +2.4 lbs empty
dive sales - faber 95 is -4.4 lbs full +2.4 lbs empty
discount divers -faber 95 is -4.4 lbs full +2.4 lbs empty

both of the following web sites list the faber tanks as -8.5 lbs full and -1.2 lbs empty.

http://www.diverlink.com/gear/tanks.htm
http://www.fifthd.com/gear/tankspecs.html

I though that all steel cylinders were negativly bouyant when empty. Which is correct?

 

[Warhammer]

All steels aren't created equally nor are they all negatively bouyant when empty. Some of the figures you'll see are for a completely empty tank, some are for a tank at 500PSI, some are with a valve, and some without. The valve itself will make a difference in the precise characteristics. Alot of times the charts won't say what the meaning of empty is nor whether or not it's with the valve. The charts I have indicate -5.2 and +2.4, but that's inclucing the extra 240PSI provided by the + rating and completely empty, with valve. Faber doesn't provide complete specs on their website, but you might try emailing them and asking for them.

http://www.divefaber.com

 

[large_diver]

Yes -- for example, my OMS LP 98 is neutral when empty. Even among OMS tanks there are differences -- some are neutral, some are negative, some are slightly positive.

Here is the link for OMS tank specs --

http://www.omsdive.com/cyl_spec.html