One additional suggestion... Mount a LP safety pop-off valve on the =
first
stage so if you have a 1st stage failure, you will have time to either =
turn
the valve off or disconnect the suit hose. You should be able to get =
the
safety valve from A.P. Valve, etc.

-Phi

> ----------
> From: 	Frank Riffel[SMTP:frank.riffel@en*.co*]
> Sent: 	Monday, June 28, 1999 4:59 PM
> To: 	Ranjit Chagar
> Cc: 	'Techdiver@aquanaut.com'
> Subject: 	Re: Mounting a argon cycl. was  Argon Bottle to Wings?
>=20
> Ranjit Chagar wrote:=20
>=20
> 	Morning all,=20
>=20
> 	To take this subject off to one side for a moment, can anyone tell
> me=20
> 	the best way to rig argon to a drysuit. My main question is where
> does=20
> 	the argon cylinder go? Also, would you have a pressure gauge on the=20
> 	cylinder?
>=20
> I have mine strapped to the doubles with a custom made retainer. But=20
> you can buy pony fixation kits that work fine, too (eg. from Halcyon=20
> or Poseidon). The cheapest option is to use straps with weight=20
> retainers.=20
>=20
> =
Top=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0 Front=20
> =
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0 =3DO---+---O=3D=20
> =A0/...\=A0=A0 /...\=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 +--|--+ +--|--+ =

> /=A0=A0=A0=A0 \=3D/=A0=A0=A0=A0 \=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =
|=A0=A0=A0=A0 | |=A0=A0=A0=A0 |=20
> |=A0 O=A0 |||=A0 O=A0 |=A0=A0=A0=A0 Tank->|#####|^|#####||-|=20
> \=A0=A0=A0=A0 /|\=A0=A0=A0=A0 //-\=A0 Bands |=A0=A0=A0=A0 | =
|=3D=3D=3D=3D=3D||=3D| <- Straps=20
> =A0\.../ ^ \.../ \-/=A0=A0=A0=A0=A0=A0=A0 |=A0=A0=A0=A0 | =
|=3D=3D=3D=3D=3D||=3D|=20
> ------/ \------=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 |#####|^|#####|+++=20
> =
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0 \_____/ \_____/ O=A0 <- Keep the valve knobe=20
> =
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 =
somewhat above the flor=20
>=20
> Weight retainer=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Weight retainer=20
> /xxxxxxxxx\=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 |=20
> |x| |x| |x|=A0=A0=A0=A0=A0=A0=A0=A0 =3D=3D=3D=3D=3D=A0=A0 v=20
> |x| |x| |x|=A0=A0=A0=A0=A0=A0 //=A0=A0=A0=A0 \\=A0=A0 =3D=3D=3D=20
> |x| |x| |x|=A0=A0=A0=A0=A0=A0 ||=A0=A0=A0=A0=A0=A0 =3DA=3D=A0=A0 =3D=20
> |x| |x| |x|=A0=A0=A0=A0=A0=A0 ||=A0=A0=A0=A0=A0=A0 =3DB=3D=A0=A0 =3D=20
> |x| |x| |x|=A0=A0=A0=A0=A0=A0 \\=A0=A0=A0=A0 //=A0=A0 =3D=3D=3D=20
> |x| |x| |x|=A0=A0=A0=A0=A0=A0=A0=A0 =3D=3D=3D=3D=3D=A0 <- Strap=20
> |x| |x| |x|=20
> \xxxxxxxxx/=20
> =A0=A0 A=A0=A0 B=20
>=20
> Another point about argon usage is to consider what happens=20
> when a piece of equipment fails, how to avoid failure and=20
> how to make the impact less seviere. Here are just some=20
> thoughts to that complex:=20
>=20
> a) inflator fails =3D> auto-inflation=20
> Prevent: operate your 1st at a lower intermediate pressure=20
> =A0=A0=A0=A0=A0=A0=A0=A0 This relievs the inflator and the hose. =
Besides it=20
> =A0=A0=A0=A0=A0=A0=A0=A0 makes it easier to disconnect the hose from =
the=20
> =A0=A0=A0=A0=A0=A0=A0=A0 inflator. ~100psi is fine.=20
> =A0=A0=A0=A0=A0=A0=A0=A0 Use an overpressure relieve valve to avoid =
damaging=20
> =A0=A0=A0=A0=A0=A0=A0=A0 of the the lp hose and drysuit inflator in =
case of=20
> =A0=A0=A0=A0=A0=A0=A0=A0 1st. failure. (Opening pressure ~200psi)=20
> Action: shut off argon (manually turn on when inflating)=20
>=20
> b) 1st fails =3D> intermediate pressure rises=20
> Action: shut off argon (manually turn on when inflating)=20
>=20
> c) hose breaks/leaks =3D> argon leaks=20
> Action: shut off argon (manually turn on when inflating)=20
>=20
> d) valve fails (no direct impact, but if another part=20
> fails it can get ugly)=20
> Action: (detach hose from inflator)=20
>=20
> As you see it is important to mount your argon bottle so that=20
> you can easily operate the valve.=20
>=20
> Now to the gauge. I dont have one because:=20
> a) it can fail=20
> b) the information is not essential=20
> c) you either add a new point for entanglement (normal hp hose)=20
> =A0=A0 or you wont be able to read the gauge (short hp hose)=20
> Of course that means you have to check the pressure BEFORE the dive!=20
> =A0=20
> Regards,=20
>=20
> Frank=20
>=20
> P.S. What is the price of argon over there?=20
> We pay ~$US65 per 350cuft (50l@20* bar) cylinder.
>=20
--
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