Refillable spray can

[Fred Cisin]

>>>> Reminds me of something I picked up years back, and haven't seen another
>>>> of - a rechargeable compressed air sprayer. Works more or less like the
>>>> disposable "canned air" sprayers you get by the half dozen at Fry's or
>>>> Microcenter, complete with the plastic straw to direct the air. But this
>>>> one had a bicycle pump valve on the bottom so you could refill it as
>>>> needed.

>>> Isn't that what Fred pointed to?

>> Almost, and that part overlaps.
>> I pointed to a refillable liquid sprayer. (we were talking about
>> spraying paint)
>> He's asking about a refillable air duster. (as opposed to the disposable
>> "Dust-Off" from Fry's, etc.)
>
On Sun, 24 Mar 2019, Chuck Guzis via cctalk wrote:
> So this?
>
> https://www.amazon.com/EWK-Aluminum-Pneumatic-Refillable-Compressed/dp/B00JKED4MS
>
> Just be sure to use a dryer on your compressor output.  Compressed air
> can hold a lot of moisture.

Close, but that also is still intended for spraying liquids.  The first 
Q&A asks, and people comment that for air, it won't hold enough ("5 
seconds")  It is a tiny size, with low pressure.

A scuba "buddy bottle"/"pony bottle" can be pressurized to 3000 psi, 
instead of just 90 - 150 psi.  Therefore, it needs a primary stage 
regulator, to get it down well below 150, and, as Chuck mentioned, a dryer 
if you don't want to spray a lot of water.

Pneumatic tools are typically run at 80 to 120 psi.
90 is the nominal standard, although many shops run at 125, or even 150, 
for higher torque, at the expense of reduced tool life and safety.
Your nozzle, for OSHA compliance, must be vented, so that when 
"dead-ended" blocking primary outlet, the pressure at the blocked end will 
be no more than 30psi.  A compliant vented nozzle will put out far more 
output pressure (when NOT dead-ended) on 90 psi, than a non-vented nozzle 
at only 30 psi.

For blowing dust, you do not want or need more than about 20 psi.  A hose 
from a spare tire can do.


--
Grumpy Ol' Fred     		cisin at xenosoft.com