I found this specification performance of a lab aspirator used as a
vacuum-pump

Air removal is extremely rapid. Evacuates liter of air to 28 inches of
vacuum in 30 seconds with water pressure of 60 pounds. Also works with
compressed air sources to 60 psi."

RBerglund


     If push comes to shove, you could use an idling automobile engine's
     vacuum.

     roger paxton

     That is a great idea. All you have to do is make sure no resin get
in it.

     Paul Lamar


Paul, Paab makes air power ejector vacuum pumps which are great for
composite work. You can get single stage versions
for about $5. Almost throw away price. Need and air compressor.
Bill

I think you mean Piab.

http://www.piab.com/en-US/Products/Vacuum-pumps-generators/


http://vacmotion.com


http://vacmotion.com/vacuum_flow_tables.htm

That works off an air compressor if you have one.

You put in 25 to 97 psi and it generates a vortex. The core of
the core of the vortex is less than atmospherics pressure. The last time
I used one it did not work well but some advancements may have been made.

Also a venturi principle works.

Paul Lamar


    Paul, how about a vacuum cleaner ? Or an old A/C  compressor, Virg

     -

The Rotary Engine News Letter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
You Tube http://tinyurl.com/beqqxas
Copyright 1998-2013 All world wide rights reserved.