RO question

[Minnesota Tapper]

I'm pretty confident now on what I'm doing with the build.looking at the membrane flow charts and trying to figure out what they actually means related to cold sap is where I get real confused haha.I'm thinking series and if I can get 45 gallons of 8% an hour that would rock. I can always change it and try parallel too. The rest of the pieces like pressure limit switches etc I have already found thanks to some great threads on RO's others have built on this site. Now I just need to figure out heating wash water and I at least have a plan of what I need!

[Mead Maple]

Awesome Trapper! Look forward to it!


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[Minnesota Tapper]

Alright help needed here. Been exploring all options and considering going with a procon 660 right away with 2 membranes and having room to add in the future. I can get a new unused but out of box procon 660 pump for $170. The model number is 106N660F11XX. Procons model number id charts says the second letter "0" means non food grade. However when I find this same pump online from dealers with same "0" non food grade designation ,in their descriptions it says for use in r.o.,carbonated water,and water filtration systems. I attached a link of one example. What am I missing here? Non food grade scares me. Possibly might be some issue with the seals that make it non food grade? At that low of a price I wonder if I could just buy the pump for $170,then buy a rebuild kit with new seals for $280. I'd still have a series 6-660 stainless pump for $450. Thoughts?
Link to listing with same part number: https://www.isopurewater.com/Procon-...S-PUMP-WO-RELI

[bowhunter]

They make this confusing and I'm not sure why the model number suggests it's non food grade, but on ProCon's NSF/ANSI 169 listing for Special Purpose Food Equipment they state that all Stainless Steel body rotary vane pumps with model number starting 106 are safe for all food grade applications. There are certain food grade applications where the brass body pumps are not recommended however they are used almost exclusively in dispensing softs drinks and coffee. I'm no expert on food grade but I personally have no concerns about using this pump in a sap RO application.

[Minnesota Tapper]

That's what I'm finding out too bowhunter. I bet quite a few builds have been made with the bon food grade pumps. I dont see the difference. With that pump how large of motor is required? I'd go 3 hp but I cat seem to find one in a 56c frame for the bolt on procon mount. Biggest I can find in 56c is 2hp.

[bowhunter]

You should be able to get by with a 2 hp. 2 hp is what ProCon recommends for that pump.

[Minnesota Tapper]

Procon does recommend a 1-2 hp motor. I found a spec sheet that says I'd be loosing a little on the very top end of pressure/flow if I dont have a 3. I have all summer to try to find a 3hp in 56c. If not I'll do a 2hp.

Looking at s.s. jet pumps most seem to have a hi/lo water pressure switch bolted to the motor. I assume that would be taken off for feeding the procon in our r.o. applications? I plan to put a low pressure cut out switch between the jet pump and procon. But that would not shut it off if pressure got to high. I went ahead and ordered the 660 procon. No turning back now!



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[Minnesota Tapper]

Maybe someone will find this info useful in the future in reference to the second prefix in procon pump model numbers. 0-non food grade, 1- food grade. I got this email and copied it here....

Hello Paul,

I spoke with the vendor and they recommend p/n: 106N660R11XX. This pump is $1,225.22.

The second letter which has an ''0'' is used for drinking water.
The model that has a ''1'' instead of an ''0'' is just certified food grade, which means that it is flushed out at the factory.
The 7th letter that has an ''R" means that it has a mechanical Seal and O'rings that have a material of Viton.

Please let me know if you have any other questions.

Best Regards,
Stephanie

[Nemo5]

If you’re close to Canada princess auto has a 3hp with a 56hc frame which is pretty much same as 56c.
https://www.princessauto.com/en/deta...or/A-p8601668e
https://www.grainger.com/tps/motors_...onal_chart.pdf


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[Minnesota Tapper]

Nemo5 thanks for that. I see they have a sealed and also a drip proof motor in the right size. I'm in central mn. Shipping estimator is $100. Which I'd pay for a good motor but I'm a little hesitant. Never heard of princess auto or power fist motors. There must be a reason baldor,marathon,weg,dayton motors dont make a 3hp 1 phase 56c in 1725 rpm. I'll make some calls tomorrow. Thanks!