Cold ethanol pumps


#21

That thing is way better than the eco pumps for sure.


#22

No problem glad I can contribute. It’s been a pain in the ass trying to find something actually rated for -80c at the pressures I need. Although it pains me to spend so much for a single pump (almost 15k with the controller and other options) in the long run being in CA its the only viable long term solution. FYI a nitrogen or inert gas blanket is required for this pump to prevent ice build up on the pump. A N2 generator will supply more than enough gas for this purpose.


#23

Bump.

@cyclopath how’s the CPE pump working at cold temps? My diaphragm pump is being way too sassy and trying my patience.


#24

Not a win. Gearpumps with rated motors are the best option other than -/+ve pressure that I’ve tried so far.

I’ve got one last trick up my sleeve. Need to secure a source before blabbing.

They are visible on this site & look like a great response.


#25

How well do they do with low Viscosity?


#26

They definitely work better once the solvent is cold. Haven’t had any problems with pulling (priming) directly from rm temp barrels.

“Don’t hate them” might too feint a praise, but saying I loved them would also be inaccurate.


#27

http://www.helwigpumps.com/PDF/V-10%20FLYER-a.pdf

Maybe this would deal with cold temps.


#28

Should work with rm temp ethanol.

Dubious about their performance at -80C.

They are described as “low volume metering pumps”, which isn’t really what we are trying to achieve.

If they can pull against a vacuum, there are other places they might be appropriate


#29

Sooo… the $400 methanol fuel (gear) pump is currently the best option I’ve tried. There are a couple of other good options that I haven’t played with yet & I still need to give this thing a decent workout, but it primes AND moves lots of solvent. We’ll see how it does against a filter…

Or at -80 whichnit is not rated for :slight_smile:


#30

Thats why I got an AI oven and an re-501


#31

Looks like they’ve got a 12gpm 115V model. I might have to go ahead and get one. https://westechequipment.com/product/110700-04-12-gpm-methanol-pump-1-in-inlet-3-4-in-outlet-115v-ac-pump-only?gclid=EAIaIQobChMIqJHomPT_4AIV0Rx9Ch0L4g0qEAYYASABEgLdq_D_BwE


#32

Worked great until we burst a bag. Intake screen clogged imediately. Not the pumps fault, but needs noting.

Both pushed and pulled, including priming, through a filter. Almost emptied it too (pumping air). Cold didn’t phase it. Not as fast as N2 (and N2 does that other stuff).

Caveats: Came lubicated. Intended for fuel not food. Leave intake screen accessible or supplement it with something both bigger & smaller.

Materials and construction appear appropriate. I removed lubricant and cleaned everything thoroughly.

Want the ability to feed it 3-20V and reverse it. Should be fairly simple.

Might make more sense to play similar games with the AC version.


#33

https://www.keg-king.com.au/catalog/product/view/id/447/s/mkii-magnetic-drive-pump-25w/

Does anybody know about these? For homebrewing from australia. Its rated up to 120C They have a bigger model and they offer a stainless housing. Theyre cheap like next to nothing. I wonder how it would work cold?


#34

This looks to be a good option, compared to the CPE Systems unit…about the same price, but has wireless remote options…and 2hp…

http://www.thevintnervault.com/product/4438/The-Vigor-150-Pump.html


#35

CIP pump that is explosion proof

https://www.alfalaval.com/products/fluid-handling/pumps/centrifugal-pumps/lkhex/


#37

Buy one and test it share results- I want one.


#38

Looks great, except the blurb says it works because the impeller is flexible…

So I have doubts about running it much below -20C

There are very few elastomers that play well at -80C


#39

If you’re in the US, note that those Aussie pumps have British Straight Pipe fittings, and want 220V. Both are doable.

They should run faster at 60hz that 50 :slight_smile:

As for how they deal with cold…?!?


#40

Alfa Laval makes great equipment, but good luck getting them to spend much time with you if you’re less than a $1M/year annual client. Also be prepared to pull out your wallet, I’ve never seen an instance where I personally felt Alfa equipment was on the right side of the cost/value equation.


#41

yeah, I did see that. Thanks for detailing that knowledge, I’ll keep it in mind when researching.