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The bag is not too tight on my neck: I have set a little gap between the bag and my neck (1 finger large) because the CO2 i exhale need to go outside the bag,i guess its the right thing to do.
are you using an argon regulator? you need to be more than one minute inhaling argon... it takes 15 minutes - 25 minutes the book says
Yes ,argon regulator.
The CO2 is supposed to be flushed by the flow of argon. There should not be a permanent gap, the bag should be with no gap around the neck, but it needs to not be tight in a way that chokes you. You should be able to insert a few fingers between the bag and the neck, but that should require some force.
Helium is the lightest
you do it laying down or sitting on a chair? They say it is better sitting on a chair but I dunno how to do it, because you also can fall.. I read about someone who feel from the chair.
Can you please explain how you connected the scuba mask to the tank with an adapter? I'm very confused about the adapter needed...
The two fittings to buy are therefore simple. The first fitting you buy is a CGA-580 to 1/4 NPT (sometimes listed as MNTP with the M meaning male). The second fitting is a 1/4 NPTF (F=female) to DIN.
Thank you for your help. It means very much to me. This may be a silly question, but will this work with helium?The two fittings to buy are therefore simple. The first fitting you buy is a CGA-580 to 1/4 NPT (sometimes listed as MNTP with the M meaning male). The second fitting is a 1/4 NPTF (F=female) to DIN.
Here are two examples of these fittings although they can be purchased from many different online suppliers.
Adapter: DIN, Female X 1/4" NPTF, SS, Oxy Version
Adapter: DIN, Female X 1/4" NPTF, SS, Oxy Versionwww.global-mfg.com
Don't worry if the fittings are stainless or brass as it doesn't matter.
Use heavy-duty thread tape or Loctite made for high pressure applications on the 1/4 NPT male-to-female connection but NOTHING on the DIN end or the nitrogen tank CGA-580 end.
A SCUBA first stage DIN regulator will screw right into the open DIN end and just needs firm hand tightening.
