I was thinking of a device that would cycle that procedure repeatedly
though a check valve to a high pressure tank.
Brian
On Thu, Mar 17, 2011 at 10:31 PM, Marc de Piolenc <piolenc@archivale.com
<mailto:piolenc@archivale.com>> wrote:
Correction:
That would work, but you would have only the mass of air that fit
the tank at *ambient pressure,* which is a small fraction of what
can be stuffed in there if air is pumped in.
Marc
On 3/18/2011 10:55 AM, ojaivalleybeefarm @dslextreme.com
<http://dslextreme.com/> wrote:
It seems like one could use a gear pump to pump water into a high
pressure cylinder, the water would compress the air in the cylinder.
That way you would avoid any problems with oil particles. Just
a thought.
Brian
On Thu, Mar 17, 2011 at 11:14 AM, Daniel D. Lance
<lanceind@gmail.com <mailto:lanceind@gmail.com>
<mailto:lanceind@gmail.com <mailto:lanceind@gmail.com>>> wrote:
Its easy to convert a regular low pressure air compressor
for hookah
purposes. If you have an oil lubricated type take it apart and
thoroughly clean out all the old oil . Reassemble it and
refill it
with a monolec type oil made for breathing air compressors.
You can
buy this oil at a dive shop or at commercial diving supply.
Remember
to place some type of filter on the air flow out of the
compressor
to trap any oil mist or droplets that might come down the
breathing
air hose. You don't want oil in your lungs. It causes a very
nasty
type of pneumonia.
Of course there are lots of cheap oil less compressors available
that would also work well for this purpose.
A high pressure compressor for filling scuba tanks is a
completely
different animal. Unless you have access to a well equipped
machine
shop making your own will be a challenge.
If you really need to fill your own scuba bottles and you
are on a
budget then I would recommend going to www.airspeedpress.com
<http://www.airspeedpress.com/>
<http://www.airspeedpress.com/> and order a copy of their book
called " Improvised and Low Cost HP Gas Boosters".While I don't
recommend that you build your own booster to pump oxygen all
of the
designs in the book will work well for air or inert gases for
technical diving.
Dan Lance
On 3/17/2011 8:06 AM, Stewart Gardiner wrote:
Hi guys, I’m fairly interested in SCUBA… as well as
being VERY
interested in subs… ive got a fairly good understanding
of air
compressor types etc… but does anyone here have any
knowledge on
the principal workings of a hookah or scuba tank filling
type
compressor? Its just something that ive never quite
understood,
and ive seen scuba refill compressors cost upwards of
$2500AUD..
so I thought why not make one! J
One of the pre-requisites is an oil-less lubrication
system for
the piston/vanes? Obviously oil vapour in the breathing
air isn’t
a good thing J
Anything else anyone can put forward to further my
knowledge?
TIA Stew
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