[EMS Discuss] Vacuum Former Fundraiser Part 2 - Vacuum System

Fri Oct 4 10:51:39 PDT 2013

Thanks to everyone who donated to this!  I used the money to purchase:

1. Vacuum pump
2. Vacuum Gauge
3. Vacuum gauge tubing
4. One way check valve
5. Two new and empty 30lb propane tanks for air

Although I'm doing some more math and now I'm not 100% sure those propane
tanks are going to be big enough.  I'm still working on it but we are
looking good to get the vacuum system hooked up next week.  More good news
is that I still have some money left over to pay for the fittings, etc.
 I'll keep you posted on progress!

Thanks again!

On Tue, Sep 24, 2013 at 2:11 PM, Rick Osgood <EMAIL HIDDEN> wrote:

> Long story short, I'm looking to raise $360.  Really I'm trying to get up
> to $400 but I have $40 left over from the previous fundraiser that will get
> put into this.  Any extra money raised will get put to the fittings, hose,
> and anything on top of that will get pushed back to purchase the electrical
> stuff for the last phase of the build.
> $231.50 - Vacuum pump
> ~$150 - Vacuum tank
> $18.50 - misc fittings, hose, etc.  This will likely cost more but I can
> pay for these smaller bits out of pocket as needed since they aren't a big
> impact on my wallet.
> Now for more details!
> Thanks to all of your generous donations from the last time we were able
> to purchase the heater element kit and get it built and installed rather
> quickly.  Now it's time to purchase all of the actual vacuum components and
> get the vacuum system installed.  Unfortunately, vacuum pumps are not
> cheap.  I think I found a good deal with one on Amazon.  It has good
> reviews, seems to be about half-off right now, and it pulls 8CFM which is
> actually more than we need.  The 8CFM pump should work up to a 2'x3'
> forming surface.  If we upgrade to a 2'x4' then he recommends we get at
> least a 10CFM pump.  We can always get one of those later though if needed.
>  The 8CFM pump will likely still work at that size for thinner plastics.
>  It will just take a long time to evacuate a larger tank with only 8CFM.
> Here's the pump I'm looking at:
> http://www.amazon.com/dp/B001P7C7QM/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=28PL120DSS0FJ&coliid=I1NQW1VN98E0DW
> I have Amazon Prime so I can get free shipping on it.  The current price
> is only $231.50 which is REALLY cheap for an 8 CFM pump.  In fact I was a
> bit skeptical at first but all of the reviews are good so I feel
> comfortable with it.  Amazon is pretty good with returns too so if it
> doesn't work out I can likely return it.
> The other major component is the tank.  We need somewhere around 20
> gallons for the 2x2 table.  A single 20 gallon tank is ideal but we can
> theoretically use multiple smaller tanks.  It will just require more
> complicated plumbing.  Another thing to think about is we ideally want a
> tank that has a 1 inch opening.  This will allow the air to flow very fast
> and strong.  A smaller opening will not pull the vacuum as strong.  After
> some research I think we can get a 20 gallon tank with a 1" opening for
> about $150 or possibly less.  I actually think this water well tank should
> work:
> http://www.homedepot.com/p/Water-Worker-20-Gal-Horizontal-Well-Tank-HT20HB/202854032#specifications
> It goes for $150.  It supposedly has a maximum pressure rating of 100PSI.
>  Since we are only using it to pull a vacuum I imagine it should only
> really feel a negative pressure of 15PSI.  Does anyone have any thoughts on
> this?  Any previous experience?  I'll keep looking for cheaper alternatives
> before purchasing anything but I think this should work if I can't find
> something else.
> Lastly I'll need to buy miscellaneous hoses, fittings, etc to hook
> everything up.  I'm not too concerned about this part since I can buy the
> smaller parts slowly with my own money out of pocket and it won't be a big
> hit on my wallet.  Of course any extra money that comes in will go towards
> this and to the final stage (electrical wiring).
> If you can donate anything more to this project, please reply and let me
> know!  If you are a member of OCCU you can transfer money directly to me.
>  I also have a paypal account, google wallet account, and of course I can
> meet up with you at EMS if needed.
> Thanks again!
> Rick
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