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Old 02-11-2012, 12:37 PM   #1
Behslayer
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A Good Vaccum Pump/Set-Up?

Anyone have a Vaccum system they could reccomend?

-inexpensive
-small

This may be a dumb question, but can you use a foodsaver for vaccum bagging things we might build for diving?
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Old 02-11-2012, 01:07 PM   #2
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Re: A Good Vaccum Pump/Set-Up?

I dont think a foodsaver will hold up that long. It might though. You can get a small air compresser, and switch the intake and pressure around, just take the pressure hose off, and put it on the intake side, and vice/versa and you have a vacuum pump, on the compresser head, if it is built to do that and turn it into a vacuum pump, and it will pull and stay down. I have a few Gast 2 cylinder hookah pumps and they work that way. Look up Gast vacuum pump on Ebay and 100s of those will come up. They would be the best, but probably any small compresser will work.
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Old 02-11-2012, 01:44 PM   #3
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Re: A Good Vaccum Pump/Set-Up?

Quote:
Originally Posted by Behslayer View Post
Anyone have a Vaccum system they could reccomend?

-inexpensive
-small

This may be a dumb question, but can you use a foodsaver for vaccum bagging things we might build for diving?
what are you trying to do? and are you still in the states ?

a food saver at best takes the pressure down a little past 0 psi ,maybe 1"-2" hg
my vac pump will take it down to 30"hg

vac is not a good way to lam guns .

give me a call
phil
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Old 02-11-2012, 03:12 PM   #4
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Re: A Good Vaccum Pump/Set-Up?

http://www.harborfreight.com/air-vac...ors-96677.html
The one I got from Harbor freight works pretty well. I don't know how long it will hold up though. Look up Venturi vacuum pumps on the web and you'll find some quality ones for a little more money. Simple design and no moving parts. Still need an air compressor though. I actually got it down to 28"
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Old 02-11-2012, 03:32 PM   #5
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Re: A Good Vaccum Pump/Set-Up?

I use the one Wrasselin uses for my poured epoxy tracks. Basically, I made a 4" pvc x 80" vacuum chamber. The vacuum for a poured epoxy track does have a dramatic reduction on bubbles and I suspect may strengthen the track (although, thats just anecdotal).
The pump is bomb proof, cheap w/no moving parts...kinda like me!
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Old 02-11-2012, 05:46 PM   #6
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Re: A Good Vaccum Pump/Set-Up?

Cool thanks guys. I'll give you a call Phil. I don't know exactly what I'll be doing with it yet.. if nothing else I can keep my fillets fresher, but I had thought about trying to cover some things with Carbon.
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Old 02-11-2012, 07:27 PM   #7
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Re: A Good Vaccum Pump/Set-Up?

Jon,

If you end up getting a pump from harbor freight, and they don't ship to indo let me know, I will pick one up for you and ship it out to you in indo.

Jim
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Old 02-11-2012, 08:44 PM   #8
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Re: A Good Vaccum Pump/Set-Up?

A long time ago I took the pump out of an old refrigerator & used it for a vacuum pump. It worked fine, very quiet. I don't remember exactly how much vacuum it produced, but I suspect it was in the 20-25 range.

That could be a good place to start if you just want to dink around with it without much (any) investment. The downside to those is that the volume they pull is really small, so it's slow to pull vacuum on something big like a surfboard or windsurf board (that's what I was doing with it). The exaust also spews a little oil fog, so you have to be careful to keep it contained.

The Gast diaphragm pumps are nice, but don't pull full vacuum (23-25" as I recall). They are quiet though.

A plain old shop vac works surprisingly well in, but does not pull more than 20". It will fry your shop vac if you do too much of it.

I would not worry too much about getting 28" of vacuum unless you are laminating something really thick, say 10+ layers of laminate. The difference in compaction isn't big until you get to really thick lams.

-Jonah
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Old 02-11-2012, 08:55 PM   #9
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Re: A Good Vaccum Pump/Set-Up?

I was jacking around with some parts fabrication and found some inexpensive vac kits for laminating. I'll see if I can find a link and post it for you.
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Old 02-11-2012, 09:06 PM   #10
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Re: A Good Vaccum Pump/Set-Up?

http://www.atlimp.com/thermo.htm

You could set his system up to do lams in one shot with this, materials should be available where you are. Where he uses the thermoplastic replace with plastic and add a fitted hood and a check valve for the vac.

I have used a pressure tank to remove airbubbles from silicon molds I have made in the past, bit more complicated but the results were stellar.
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Old 02-12-2012, 12:15 PM   #11
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Re: A Good Vaccum Pump/Set-Up?

Quote:
Originally Posted by Behslayer View Post
can you use a foodsaver for vaccum bagging things we might build for diving?
Yes
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Old 02-12-2012, 05:19 PM   #12
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Re: A Good Vaccum Pump/Set-Up?

Airtech, marine grade.
I'm sure there are other providers, but these guys are also mfgr's.

Be sure to order 'marine grade' not the aerospace==$$$.

SDM
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