Quote Originally Posted by andy_con View Post
Ok cool

Are these any good

http://www.clampusystems.com/Venturi.html

Some claim 90% odd vacuum

Not saying they are a perfect solution but are they worth considering if you have a big enough compressor?
Yes they work good but again you need a Reservoir tank because they struggle to provide enough volume direct from the generator.
Having reserve of vacuum is what you need for when vac loss happens. Otherwise you need a powerful vac pump.

Just think of it has the reverse of a compressor, you wouldn't try using air tools with no air in your tank because the pump would struggle to keep up with the demand. It's just the same but with negative pressure.! . . . Holes in your work piece are like having a high CFM air tool.!