Filling o2 question

[J_glenn06]

I got to think about something while i was filling nitrox earlier for a customer so here it is." If you fill a al 40 with 100%02 is it sitting at 3000 or 2500?" I ask this because our 100% storage bottles that we have only go to 2500. We have just used 50/50 all the time and i have never really thought aout it. What do dive shops in cave country fill 100% to down there?

[Meister481]

I got to think about something while i was filling nitrox earlier for a customer so here it is." If you fill a al 40 with 100%02 is it sitting at 3000 or 2500?" I ask this because our 100% storage bottles that we have only go to 2500. We have just used 50/50 all the time and i have never really thought aout it. What do dive shops in cave country fill 100% to down there?

Depends on where you go, Cave adventurers fills to 3100 or so, cave excursions fills to 3000. Many shops don't have O2 pumps like they do. Many shops just cascade to whatever they can get from their O2 bottles. Usually about 2400psi.

[J_glenn06]

Depends on where you go, Cave adventurers fills to 3100 or so, cave excursions fills to 3000. Many shops don't have O2 pumps like they do. Many shops just cascade to whatever they can get from their O2 bottles. Usually about 2400psi.

Thats what we do how can we change it? 02 pumps? I just dont wont to have a customer come in asking for 100% and we can only filll it to whatever we got. Thats not good buisness if you ask me

[Meister481]

You can spend 4k on a big pump, or if you only fill every once in a while use a mini booster pump for around $1500. I think North East Scuba Supply has one in that range.

http://northeastscubasupply.com/stor.../prod_216.html

http://www.divegearexpress.com/rebre.../booster.shtml

Edit: Thanks for thinking of your customer, many shops forget about that these days.

[FW]

Thats what we do how can we change it? 02 pumps? I just dont wont to have a customer come in asking for 100% and we can only filll it to whatever we got. Thats not good buisness if you ask me

There are electric boosters, and also the standard pneumatic (Haskel) type. You should talk to a couple of fill station owners in N FL.

Cave Adventurers in Marianna has an electric booster, Cave Excursions (east and west), and Amigos have pneumatic boosters.

[J_glenn06]

Thanks ill will check into those

[MORGAN]

Dive Outpost has a pneumatic booster.

Mike

[fno]

Keep in mind that said boosters will pump higher than 3000 psi. There is a much greater chance of a fire or explosion at higher pressures than that. I've had the pleasure of fixing just about everyones boosters in N. FL for that reason.

[WJH]

I am one of many who is happy to receive a 2000 psi O2 fill, and thrilled when I get 2200-2400. A 3000 fill of O2 actually makes me a little nervous, and I don't want it unless I'm going to use that first few hundred psi on a dive in the next couple weeks. I am, however, one of those mentioned above who has a LP 45 for my O2 deco bottles. This is for the lower pressure rating, but more so for the excellent buoyancy characteristics as a deco bottle.

Slightly off-topic, but my O2 (and EAN 50) bottles always either have a SS DIN plug in them or a reg attached to prevent any unintentional unleashing of a high pressure stream of combustible gas.

WJH

[fno]

WJH, neither the O2 or 50/50 is combustible. A better term is accellerant. High pressure, fast moving O2 makes things that would ordinarily not burn go up in flames. Examples of this are tank valves, O-rings, brass and SS fittings, hoses, and even Haskell heads. Impingement is another problem. A small particle is moving with the gas and hits something else, or the friction causes it to get hot and eventually burn in a rich O2 environment. Thus the basic rules for O2 filling. Go slow, stay below 3000 p.s.i., use a filter on your cascade manifold, keep things cool.