Uses for a rotary vane vacuum pump?

[danbuff]

I picked up a nice unused Gast 1022 rotary vane vacuum pump years ago, and I am not sure what I might use it for.
Looked good on the flea market table and the price was right.

I will never use for vacuum press and thought I could use for AC work, but it doesn't pull low enough vacuum. (26.5 in-Hg).

I do some woodworking, car repairs, home machine shop work.

Its 3/4HP.

Any ideas for its use in a home shop environment?

Thanks for your inputs.

Dan

 

[pcmeiners]

Screw the vacuum use, use it for a clean air supply while spray painting.

 

[rsanter]

Sell for profit

Bob

 

[danbuff]

Sell for profit

Bob

That was my initial thought.. But thought I'd ask the crowd of knowledge first.

 

[PCustoms]

Vacuum hold down table for your mill.

I have one, pretty sure the same model. Was setup for a fresh air supply originally. I couldn't stand breathing in the full face mask, so now I use it for vacuum bagging composites.

 

[Davefr]

That was my initial thought.. But thought I'd ask the crowd of knowledge first.

Tough sell. No demand and lots of them out there. Expensive to ship. Just save it for a potential future project. (like woodworking veneering or vacuum clamping)

 

[mbshop]

Umm, that can be used for ac work. Just need to leave it on a bit longer. 45 minutes should be just fine.

 

[danbuff]

Umm, that can be used for ac work. Just need to leave it on a bit longer. 45 minutes should be just fine.

I thought one needs ~ 29 in-Hg for AC work..
Obviously I dont know much about vacuum pumps..

 

[wildbill23c]

I thought one needs ~ 29 in-Hg for AC work..
Obviously I dont know much about vacuum pumps..

You mentioned ~25in-hg earlier. That could mean a leak somewhere, so may not have been the fault of the vacuum pump, just either wasn't left running long enough, or there was a leak in that AC system. ~29in-hg is the max, but also depends on temperature and your location (elevation).

 

[danbuff]

You mentioned ~25in-hg earlier. That could mean a leak somewhere, so may not have been the fault of the vacuum pump, just either wasn't left running long enough, or there was a leak in that AC system. ~29in-hg is the max, but also depends on temperature and your location (elevation).

The maximum vacuum for the pump I have is 26.5 in-Hg.
I was saying that from I read that is not sufficient vacuum for effective AC work.. Wont effectively 'boil' the moisture out.

 

[Ruger_556]

We use them to prime irrigation pumps, not that this helps you

 

[Firebrick43]

Vacuum bagging veneer and laminated woodworking projects. Make plywood cabinet doors and sheath in epoxy/fiberglass for a smooth and moisture proof doors?

 

[racingtadpole]

Now's your chance to start making stuff with carbon fibre..

 

[mbshop]

In the good old days we would be glad to have that much vac. Moisture will boil off if vac is left on long enough. Having done tons of ac work with older pumps we just didn't have moisture issues in hawaii. But if your not comfortable with that and need it for ac then sell it and get a "proper" pump.

 

[Davefr]

Umm, that can be used for ac work. Just need to leave it on a bit longer. 45 minutes should be just fine.

Not true. You need to pull below 500 microns for modern HVAC systems. That's 29.9+ in. hg.

The only possible workaround is to use the triple evac. method where you introduce dry nitrogen between each of three evac. cycles. The nitrogen will absorb and sweep away residual moisture. However if the pump cant even get to 29 I wouldn't even try this method.

 

[Squddle]

can it be used to do a topside oil change? or transmission fluid evac?

 

[SantaAna12]

Now's your chance to start making stuff with carbon fibre..

Interesting thought. A friend of mine has been learning the ropes and his last piece impressed the hell out of me. He's capable, but his retractible bowsprit skills I do admire.

 

[Ditch]

 

[joel63]

Not true. You need to pull below 500 microns for modern HVAC systems. That's 29.9+ in. hg.

The only possible workaround is to use the triple evac. method where you introduce dry nitrogen between each of three evac. cycles. The nitrogen will absorb and sweep away residual moisture. However if the pump cant even get to 29 I wouldn't even try this method.

Yes, don't even try.

http://www.engineeringtoolbox.com/water-evacuation-pressure-temperature-d_1686.html

 

[Warrenator]

Build yourself a pneumatic tube delivery system like they have in bank drive-through windows. Goes from the kitchen to the garage. You will be limited to tubular foods though, like burritos, sub sandwiches, bar shaped donuts, etc.