re: Nano Booster

"Jason" <jason.usenet.nospam@ntlworld.com> wrote in message
newsan.2003.10.16.10.18.57.744832@ntlworld.com.. .
> On Thu, 16 Oct 2003 10:57:34 +0100, Zak wrote:
>
> >> Gordon Henderson
> >
> > Oops, Sorry gordon.
>
> I think you also need to apologise to Gordon for subscribing to his
> mailing list with an email account that bounces incoming mail. My post to
> scuba-uk got a bounce back from Cruelmail because you've done this.
>
> Jason

Wind ya neck in wookie......and... cheers for pointing it out, I'll see if I
can fudge it.

<Pete S.> wrote in message
news:bmssov08gam5ef1sptot2u9vhmg1nd80lr@4ax.com...
> On Thu, 16 Oct 2003 09:29:56 +0100, "beanie"
> <nospam@diving.ukdiver.com> wrote:
>
> >
> ><Pete S.> wrote in message
> >news:ms1rov4uqguhoj76oevaunrdrpduj77ogm@4ax.com.. .
> >> On Wed, 15 Oct 2003 18:39:06 +0100, Pete S. <> wrote:
> >>
> >>
> >> >>right now I have 3 fills of 3l O2 in a J but only at 45bar
> >> >>(45*50=2250 /3 =750 /200 =3.75 fills)
> >> >>
> >>
> >> And boosting from 45 bar is easy. I did, as a try out, boost He up to
> >> 210 bar from 10. Just to see what happens, you understand.....
> >>
> >
> >how long did it take?
> >
> >
> I can't remember. I was just fannying about to see what happened
> if....
>
> But if you have a 150 bar 3 litre O2 for the inspiration, and you want
> to get to 210 bar, it takes 10 / 15 minutes. I just plug it in and
> leave it going while I do the diluent. Everything seems to happen
> quite easily then.

Gordan said this
"The pumping rate is a bit complicated with a pneumatic booster. The
ratio between the drive piston and the output piston is 23:1. In theory
a 10 bar drive gas will yield a 230 bar output. In fact the seal
friction and the gas compressibility reduces the output to around
210-220 bar. The effective boost ratio between the supply tank and the
output tank can be as much as 5:1 ( 3:1 with helium ). So you could
pressurize a tank to 200 bar from a supply tank at 40 bar. In practice
you would use far too much drive gas to make it practical. From what I
have seen a 3:1 ratio is more realistic. When the supply tank pressure
drops below 75 bar the drive gas consumption becomes excessive if you
are using a scuba tank to drive the booster. Other variables are the
relative size of the supply and fill tanks.

The drive piston displaces .29 liters per stroke. The output piston
displaces .0126 liters. So a 12 liter scuba tank should provide almost
800 strokes at maximum outlet pressure. Inlet and outlet ports are 1/4
female npt.

As an example:

To fill a 2 liter tank which was at 170 bar to a final pressure of 210
bar from a 12 liter supply tank that had 110 bar of air took three
minutes and 52 strokes of the booster. To fill a 2 liter tank from 100
bar to 210 bar from a 12 liter tank that had 100 bar took 10 minutes and
165 strokes. "



> If you want better performance buy a Haskel. But they cost a bit more.
>
well yeah if I had the money I would but that and the transportability of
the nano makes it more favourable only pumping little cylinders

beanie wrote:
> Gordan said this
<<SNIP>>
I'm having problems with some of the mathematic there
but that's not something to bore you all with.

>> If you want better performance buy a Haskel. But they cost a bit
>> more.

Mine is 1.5L input, 20ccs output, 75:1 boost. You need 1.5L
at one seventy-fifth the output pressure to pump 20cc of the
supply pressure. As with all bosters if the supply pressure
is low the input consumption is sick and the output pressure
only creeps up. However the Haskel will pump all day and if
you really want 700bar...

Also the Haskel is heavy, say 10Kgs, plus hoses, gauges et. al.
The nano-booster is much more 'baggage allowance' friendly.

I still think the best booster would be a 12L 300bar tank
with a baloon in it. Add a two way valve so you can handle
the baloon and outside the baloon seperately. Yes there are
some issues about not being able to see when things are full
or flattened out but if you had a big scuba-shop gas bank
you could dump gas into the baloon then pump the outside
and ram up a mix in no time (and probably strip the paint
off the tank in the process).

nigelH

Nigel Hewitt wrote:

> beanie wrote:
>> Gordan said this
> <<SNIP>>
> I'm having problems with some of the mathematic there
> but that's not something to bore you all with.
>
>>> If you want better performance buy a Haskel. But they cost a bit
>>> more.
>
> Mine is 1.5L input, 20ccs output, 75:1 boost. You need 1.5L
> at one seventy-fifth the output pressure to pump 20cc of the
> supply pressure. As with all bosters if the supply pressure
> is low the input consumption is sick and the output pressure
> only creeps up. However the Haskel will pump all day and if
> you really want 700bar...
>
> Also the Haskel is heavy, say 10Kgs, plus hoses, gauges et. al.
> The nano-booster is much more 'baggage allowance' friendly.
>
> I still think the best booster would be a 12L 300bar tank
> with a baloon in it. Add a two way valve so you can handle
> the baloon and outside the baloon seperately. Yes there are
> some issues about not being able to see when things are full
> or flattened out but if you had a big scuba-shop gas bank
> you could dump gas into the baloon then pump the outside
> and ram up a mix in no time (and probably strip the paint
> off the tank in the process).
>
> nigelH

<PEDANT>
Erm its balloon...
</PEDANT>
--
The box said windows 98 or better, so I installed Linux

Header is false, correct is Danny at danshome dot org

Danny Burchett wrote:
> Nigel Hewitt wrote:
>> I'm having problems with some of the mathematic there
>
> <PEDANT>
> Erm its balloon...
> </PEDANT>

It's also 'mathematics' but what the 'eck?

Did you ever breath that naughty mix
I brewed you? Did it help?

nigelH

"Nigel Hewitt" <news@REMOVETHISnigelhewitt.net> wrote in message
news:3f900164$1@news.star.co.uk...
> beanie wrote:
> > Gordan said this
> <<SNIP>>
> I'm having problems with some of the mathematic there
> but that's not something to bore you all with.
>
> >> If you want better performance buy a Haskel. But they cost a bit
> >> more.
>
> Mine is 1.5L input, 20ccs output, 75:1 boost. You need 1.5L
> at one seventy-fifth the output pressure to pump 20cc of the
> supply pressure. As with all bosters if the supply pressure
> is low the input consumption is sick and the output pressure
> only creeps up. However the Haskel will pump all day and if
> you really want 700bar...
>
> Also the Haskel is heavy, say 10Kgs, plus hoses, gauges et. al.
> The nano-booster is much more 'baggage allowance' friendly.
>
> I still think the best booster would be a 12L 300bar tank
> with a baloon in it. Add a two way valve so you can handle
> the baloon and outside the baloon seperately. Yes there are
> some issues about not being able to see when things are full
> or flattened out but if you had a big scuba-shop gas bank
> you could dump gas into the baloon then pump the outside
> and ram up a mix in no time (and probably strip the paint
> off the tank in the process).
>

novel but me thinks not quite so practical

would you not need drive gas at output pressure to get the output?
and use a lot of drive gas?
it would let you go from 1 bar to 300 though wouldn't it?

anyway all I want is something to put gas in my 3s to ~200 bar

Nigel Hewitt wrote:

> Danny Burchett wrote:
>> Nigel Hewitt wrote:
>>> I'm having problems with some of the mathematic there
>>
>> <PEDANT>
>> Erm its balloon...
>> </PEDANT>
>
> It's also 'mathematics' but what the 'eck?
>
> Did you ever breath that naughty mix
> I brewed you? Did it help?
>
> nigelH

Hmmm... at 22M I noticed no difference... GRRR I will never use that skipper
from Eastbourne again.

Thanks NEway, another time perhaps

Danny
--
The box said windows 98 or better, so I installed Linux

Header is false, correct is Danny at danshome dot org

On Thu, 16 Oct 2003 10:57:34 +0100, "Zak" <Zak@nospam.cruelmail.com>
wrote:

>
>"Gordon Henderson" <gordon@unicorn.drogon.net> wrote in message
>news:bmjrvd$8d4$1@unicorn.drogon.net...
>> In article <YGajb.3135$mM1.1341@newsfep4-winn.server.ntli.net>,
>> Zak <Zak@nospam.cruelmail.com> wrote:
>> >Last time I checked. $1200 can, including booster, fittings etc and all
>in a
>> >peli box. Then you have to add import duty and shipping.
>> >
>> >Contact gordon if you want the full SP.
>>
>> And before I get ant more email about this, it's Gordon Smith not me
>> (alas)
>>
>> See http://www.jetsam.ca/
>>
>> Gordon Henderson
>
>Oops, Sorry gordon.

You numpty

Laz

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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