Good Metering Pumps for Ethanol?


#1

I’m interested in getting metering pumps to add feed and dispense collected solvent out of a rotary evaporator to try and automate the whole process. I’m having surprising trouble sourcing these however. I know some of you have made this modification; what brands are you using, and what did you like/not like about your choice? Looking for flows in the 3-6L/hr range.


#2

On the same boat as you but for my falling film evaporator. Considering the liquiflo pumps as well as the cole parmer peristaltic pumps for this.


#3

Danfoss not cheap but really good


#4

Would a standard explosion proof diaphragm high proof distillery pump work? https://shop.distillery-equipment.com/products/5-gpm-explosion-proof-beverage-alcohol-pump-for-high-proof-spirits-flojet-g70c

If you’re only moving alcohol and not product laden alcohol. I’m guessing something like this might work.


#5

way, way too fast for this application. I’m talking less than a gph, this is 5 gpm. Could however be useful as a general tool for moving alcohol from one vessel to another.


#7

This may be a great time to “know someone” working at say JD or the like. They would have first hand knowledge on that. And may even steer you in the right direction.


#8

This is pretty economical. Not sure it would work transferring chilled ethanol though as it is not rated for low temperatures. Probably worth a try.


#9

I would use a piston liquid transfer pump from Cole Parmer, or the like. Peristaltics will work but i like to stay away from consumables


#10

Sureflo diaphragm pumps are self priming and will pull against a vacuum