AllanMar

Recipes 

Your planning to sell them with position control capability also?

If I was doing it again I would put a 3pc ball valve on the outlet of each pump for flow control and everything else would be butterfly.

mattd2

Recipes 

Why not butterfly on the pumps too? Better linearity (if that's a word ) than a ball valve.

__________________
My DIY grain mill
First AG mini-BIAB

AllanMar

Recipes 

Yea thats true.

I used a NPT 3pc ball valve and a TC 3pc ball valve to make 2x NPT to TC ball valves. I liked this setup so I pictured sticking with it (didn't want to modify the pump). A butterfly valve would work too.

kickflip_mj

Recipes 

Allan, Can I see what valve you have built?

AllanMar

Recipes 

I backed away from doing motorized valves and went with TriClamps, so I doubt it's much help to you. My work in progress is here:
http://www.homebrewtalk.com/f170/single-tier-eherms-triclamp-mostly-build-372976/

kickflip_mj

Recipes 

I love the brewery! great job so far

I went with 8 motorized valves. They are a little custom from the manufacturer. Just 2NM force over 1nm that people normally get. I didnt want to deal with stuck valves. But at the moment im working on integrating actuators with TC butterfly valves. When I get the stand completed I will post pictures of all the crazy amount of TCs and stainless I have.

AllanMar

Recipes 

Thanks. Motorized TC butterfly would be my ideal. I'd love to see what you come up with eventually.

marcb

Recipes 

Ok, any progress? Planning my valve purchases for the new system!

kickflip_mj

Recipes 

No progress on the valves, I have purchased 3 different ones all 1 inch tri. I own the economy, 3 peice, and butterfly and they are all really hard to turn. definitely over 10nm. But don't lose faith I am working on them diligently along with moving this week.

kickflip_mj

Recipes 

I think a lot of my problems are because I cant seem to find out how much force it takes to turn this valve. Not that I cant do the math but their are zero specs out their.