Which of these pumps would be best?


Which of these pumps would be best?
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Otolithco
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Otolithco
posted 7 Years Ago HOT
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Gast DOA-P707-FB  listed at $200 obo

Gast 2067-v108 listed at $500 obo

These pumps are available locally and are new.

Anyone have experience with these pumps? Would they be suitable for composites? My parts are going to be in bag rather than a mold. Parts are roughly 5' long by 6" wide. 

Any help would be appreciated. 

Thanks
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Otolithco
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Otolithco
posted 7 Years Ago HOT
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oekmont - 6/28/2018 7:28:40 PM
In my opinion both pumps are not ideal for composite work. Just get a cheap rotary vane pump. They are much cheaper, better suited for composite processes and will last virtually forever, membranes will not.

The bigger Gast is a rotary vane I believe. Although I don't know much about pumps. Would this one just be overkill?
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Which of these pumps would be best?
Otolithco - 7 Years Ago
     In my opinion both pumps are not ideal for composite work. Just get a cheap rotary vane pump. They are much cheaper, better suited for composite processes and will last virtually forever, membranes.....
oekmont - 7 Years Ago
             The bigger Gast is a rotary vane I believe. Although I don't know much about pumps. Would this one just be overkill?
Otolithco - 7 Years Ago
     Sorry, it should be an oil bathed Rotary vane. The bigger one is oil free. Which means that the vacuum level is not good enough for resin infusion. For vacuum compression it should be ok, though. so....
oekmont - 7 Years Ago
             Awesome thanks for the help!
Otolithco - 7 Years Ago
     I have used a smaller gast for a long time and it works fine, just a bit noisy compared to others. Now I use a Rieschle but the Gast is still a working backup.
Fasta - 7 Years Ago
     I used a gast pump when I first started. I was only able to pull 20 from it and for small parts it worked ok but anything of size it was pretty worthless. I picked up a couple Robinair pumps and neve...
drippy - 7 Years Ago
     I use EC's pump and it works fine. Pulled a good vacuum on my car's front clip (around 1.6m x 1.6m x 0.6m) so will cope with most things.
Steve Broad - 7 Years Ago

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