Looking for a new vacuum pump

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Looking for a new vacuum pump

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Steve Broad	Steve Broad posted 5 Years Ago HOT Topic Details
Group: Forum Members Posts: 408, Visits: 4.1K	My old EC vacuum pump has packed up so I am looking for a replacement. I am using a old CPS pump I had prior to the EC unit. It had packed up but since the EC unit bit the dust I had another look at it and the problem was that it had ingested resin! Cleaned it out and it now works fine but would like to have a spare. The updated EC unit looks good but seems expensive at £276 when compared to offerings on ebay. Looking at one for £64, less than a 1/4 of the cost! It has a CFM of 4 whereas the EC pump is only 2.84. Power is 0.19kw cheap v 0.15kw EC. The only advantage the EC offering has, as far as I can see, is an absolute vacuum of 99.98% compared to 99.95% for the cheap pump. Is this 0.03% significant for home use? Are there other advantages worth paying over £210 extra for? Update. Just found one for £45! 2.5CFM and 5Pa vacuum. Edited 5 Years Ago by Steve Broad
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Steve Broad	Steve Broad posted 5 Years Ago HOT Post Details
Group: Forum Members Posts: 408, Visits: 4.1K	+x oekmont - 5/15/2020 8:05:07 AM The ec pump is a closed oil cycle pump. This is a much more complicated design. The main difference is, that this type does not produce oil vapour. I switched to the big dvp pump from ec, and I am very happy with it. First off all because the chamber it is placed in is still perfectly tidy. The second benefit is of course the impressive volume flow of the big version. Well, my older EC version certainly did produce oil vapour! :-) Hopefully they have improved on that. However, no oil vapour isn't worth an extra £200 to me as my ventilation is good and I certainly can't justify spending nearly £600 for 12CFM, although it would be nice. :-) If the only difference with the standard pump is less oil vapour then I think that I will risk the cheapo one. I don't do that much carbon to worry about vapour. You didn't comment on the 0.03% difference in absolute vacuum. Is is significant?
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