PUMP FOR VACUUM POT-QUESTION/HELP

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wood-of-1kind

wood-of-1kind

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http://www.google.com/products/cata...1&ie=UTF-8&tbm=shop&cid=16878105569500008431#

For those in the know here. I need your assistance. Will this type of PUMP work sufficiently to draw vacuum to run a vacuum chamber? I am interested in
doing some worthless wood and harden the pen blanks.

A comment or two to help me with this type of unit would be most helpful. I can get one of these units at a low price and will do so if it works.

Thanks in advance for your input.
 
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LMI B121-392SI, Series B Metering Pump, 2.5 GPH @ 100 PSI, 115 Vac


This looks to be a liquid pump. Notice the 2.5 GPH at 100 PSI. The 115 Vac stands for 115 Volts AC current. If you tried to run as a vacuum pump, it would burn the pump parts up as it uses the liquid to cool the seals and impeller that pumps the liquid. Don't think this would work for what you are wanting to do.
 
Peter, I don't know if there are nay Harbor Freight type stores near you, but a 2 to 3 cubic ft. refrigeration will work very well if you use a small vessel or a vacuum bell, but even the plastic bells are ungodly high, a 12 inch bell is about 150.00 down here. I think that there are also compressor driven Vacuum pumps fairly cheap. I have a 6.5 CFM Welch scientific pump that at our altitude will pull down 28.5 to 28.8 inch of mercury in a 12 inch bell, you could use one of the HF Pressure pots for vacuum. It might not explode as reports have been a bit freaky. BUT the things can Implode, and I've had that happen, doing jewelry investment casting. We found parts of the bell jar 40 feet away and casting investment all over the top. You altitude will have a major effect on the amount of atmospheres your pump can draw, This looks like a heck of a deal, http://www.harborfreight.com/catalogsearch/result?q=vacuum+pump 149.00 my Welch was 1500.00
 
Ken, Randy

Thank you both for your valuable input. Guess that this pump that I had in mind will NOT be suitable for what I had in mind.

Ken, we don't have HF here in my neck of the woods, but we do have a chain of Princess Auto and they may have that style of pump.
 
Peter, if you can find an appliance dealer in your area that hauls off the old refrigerators, he might be willing to give you one of the old units that still run. The pump on the fridge will make a very good vac pump. Be sure to cut the lines as long as possible. You will need to rig up a connector from the suction side to your vac chamber. the cost will be the price you end up paying for the required fittings to adapt the pump to your chamber. I have one I used for years in a fly-by-night AC business. Even when it does eventually quit working, youi just grab another fridge and go again. As always YMMV.
Charles
 
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