HF Vacuum pump

[PaulDoug]

Is the the vacuum pum that is suppose to be good for casting?

[FONT=Arial, Helvetica, sans-serif]CENTRAL PNEUMATIC[/FONT]
[FONT=Arial, Helvetica, sans-serif]AIR VACUUM PUMP WITH R134A AND R12 CONNECTORS[/FONT]

[FONT=Arial, Helvetica, sans-serif]ONLY[/FONT][FONT=Arial, Helvetica, sans-serif]
$12.99[/FONT]
[FONT=Arial, Helvetica, sans-serif]96677-6VGA[/FONT]
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[Monty]

Just be aware that this is a venturi type pump and it must be connected to a constant air pressure line for the venturi effect to work.

 

[Nick]

Paul,
I have one and it seems to work fine, not as good as a larger unit.

 

[VisExp]

Paul, the one I got had a blue cover, but I'm guessing it is the same thing. You need to connect it to a fairly big compressor. The compressor I have only has a 4 gallon tank and runs out of air pretty quickly when connected to the venturi pump. I have a shut off valve either side of the venturi pump. I draw down as much as I can, shut off the air to the venturi, let the compressor fill up again and then draw down again on the venturi. It would be easier with a bigger compressor.