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Beginner questions about my eBay pump
Beginner questions about my eBay pump
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BlackNDecker
BlackNDecker
posted 11 Years Ago
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Greetings all,
I purchased a pump off eBay last year. I don't see any manufacturer markings so I don't know what brand of pump it is. My first question is about oil replacement...I don't see a place to put the oil. Is it possible this is an oil less pump?
Second question refers to the vacuum...when I place my finger over the port it maxes out at a hair over -25 mmHg. Is this sufficient for vacuum infusion or is -30 mmHg mandatory?
Thanks in advance!
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BlackNDecker
BlackNDecker
posted 11 Years Ago
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THanks for the reply.
Do you think -26 mmHg vacuum is sufficient for medium and large projects? Would the vacuum be expected to slowly increase to -30 mmHg if it is allowed to idle for several minutes?
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brainfart
brainfart
posted 11 Years Ago
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Do you think -26 mmHg vacuum is sufficient for medium and large projects?
It will work for vac bagging. Resin infusion... not sure, might be sufficient for some projects. Degassing of resins: too little vacuum to efficiently degas.
Would the vacuum be expected to slowly increase to -30 mmHg if it is allowed to idle for several minutes?
No. It has only one pumping head, this will only achieve about 80-100mbar vacuum (this is roughly 90% vacuum, so that would be about -27 inches Hg for the non-SI unit people on this forum).
[edit: typo, -27 inches Hg instead of -.27]
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brainfart
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Beginner questions about my eBay pump
BlackNDecker
-
11 Years Ago
Judging by the shape of the top, that will be a diaphragm pump so will not have any oil
ajb100
-
11 Years Ago
THanks for the reply. Do you think -26 mmHg vacuum is sufficient for medium and large projects?...
BlackNDecker
-
11 Years Ago
[quote]Do you think -26 mmHg vacuum is sufficient for medium and large projects?[/quote] It will...
brainfart
-
11 Years Ago
Thanks for the helpful replies everyone. I found this document from West Systems that is a good...
BlackNDecker
-
11 Years Ago
The elevation you live can reduce the atmospheric pressure you are reading on the gauge.
20_rc51_00
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11 Years Ago
I've also found analogue gauges to be pretty useless when it comes to reading the vacuum level...
Hanaldo
-
11 Years Ago
I'm in the market for a new pump right now and I must say that I have no expertise, but nevertheless...
romdj
-
11 Years Ago
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