Positioning valve actuator for liquid - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > Automated Brewing Forum > Positioning valve actuator for liquid

Reply
 
Thread Tools
Old 08-05-2012, 06:34 PM   #1
SMc0724
Recipes 
 
Mar 2011
Beaumont, Tx
Posts: 143
Liked 3 Times on 2 Posts



I'm looking for a ball valve with a positioning actuator. The purpose is to control liquid pump volume output with a feedback loop, through an Arduino, from a flow meter.

So far, cheapest is a valve with a pneumatic actuator for over four hundred.

Any thoughts?

 
Reply With Quote
Old 08-06-2012, 03:19 AM   #2
Squeeky
Recipes 
 
Sep 2005
Dayton, Ohio
Posts: 456
Liked 18 Times on 15 Posts


Depending on the setup, you could use pressure sensors to determine how much liquid has left or entered a vessel. I realize it is not was you were asking, however another way to skin a cat or brew a beer I will be using them with my brewtroller in order to determine a vessel's volume and turn off valves when at desired volume.

What will they be used for, just trying to find a budget way.

 
Reply With Quote
Old 08-06-2012, 05:58 AM   #3
SMc0724
Recipes 
 
Mar 2011
Beaumont, Tx
Posts: 143
Liked 3 Times on 2 Posts


Sorry to be vague, the valve would be used to control the flow rate (gpm, cfs) out of pump. (My preference is to use a stepper motor on a pump, but that's expensive for the rates I would like to see.) I can think of a few possible applications:

1. When using a reverse chiller, to slow pump rate down through chiller to improve heat exchange, until outflow temperature of wort reaches desired point.

2. When recirculating, sparging, and draining mash tun, to prevent negative pressure under grain. And prevent a stuck mash.

3. To control how fast wort moves between tuns and fermenters.

4. To eliminate the need to stir the tun with a mechanical vane, just let the pumped water do it.

There may be some problems because the valve can create a Venturi effect on the fluid.

 
Reply With Quote
Old 08-06-2012, 12:57 PM   #4
kladue
Senior Member
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Dec 2006
Turner, Oregon, Oregon most of the time now
Posts: 2,305
Liked 53 Times on 47 Posts


Look at Belimo valves for electric actuated ball valves, around $200 new, much less from Ebay, only problem is Arduino will not output the 1-10V signal needed to control position.

 
Reply With Quote
Old 08-06-2012, 01:38 PM   #5
SMc0724
Recipes 
 
Mar 2011
Beaumont, Tx
Posts: 143
Liked 3 Times on 2 Posts


Thanks kladue, if I remember my electricity and electronics correctly, the analog 4-20mA signal out of Arduino must have a voltage side to it, possibly (from memory) 0-5V. It still might work, I'll check it out. Thanks.

 
Reply With Quote
Old 08-06-2012, 01:54 PM   #6
SMc0724
Recipes 
 
Mar 2011
Beaumont, Tx
Posts: 143
Liked 3 Times on 2 Posts


I found this about converting 0-5V to 0-10V. Good starting point. http://www.nano-reef.com/forums/inde...owtopic=230743

 
Reply With Quote
Old 08-06-2012, 09:57 PM   #7
SMc0724
Recipes 
 
Mar 2011
Beaumont, Tx
Posts: 143
Liked 3 Times on 2 Posts


So with kladue's advice, I bought a Belimo actuator and valve. Decided to buy these features:

1. CCV ball valve because it has a linear profile;

2. Three-way action to give more flexibility; and

3. Floating-point actuator because it is cheaper.

Found it on eBay for 40 bucks, free shipping!

It arrives next week. It will be the first piece of automated equipment since I bought my Arduino.

:-D

 
Reply With Quote
Old 08-07-2012, 01:23 AM   #8
kladue
Senior Member
HBT_LIFETIMESUPPORTER.png
Recipes 
 
Dec 2006
Turner, Oregon, Oregon most of the time now
Posts: 2,305
Liked 53 Times on 47 Posts


Now you can use 2 digital points and control it without much code difficulty, pulse up / down in response to flow. A suggestion is to write a "Home" sequence to preposition the valve for startup, all the way in one direction then back the other way 45 seconds to be centered as the actuator is a 90 second travel stop to stop.

SMc0724 Likes This 
Reply With Quote
Old 08-10-2012, 05:35 AM   #9
helibrewer
HBT_SUPPORTER.png
 
helibrewer's Avatar
Recipes 
 
Nov 2011
Santa Rosa, CA
Posts: 3,808
Liked 324 Times on 274 Posts


It's a little different approach but I have used a light dimmer switch to modulate my pump speeds for transfering (racking). Maybe a combination of valve position and pump speed?
__________________
Something is always fermenting....
"It's Bahl Hornin'"

Primary:
Kegged: Bourbon Barrel Imperial Stout
On Deck: German Lager

 
Reply With Quote
Old 08-13-2012, 11:40 PM   #10
SMc0724
Recipes 
 
Mar 2011
Beaumont, Tx
Posts: 143
Liked 3 Times on 2 Posts


I got the Belimo today. I'm worried the orifice in the valve is too small. Its a 1/2" valve, the orifice is 3/8" x 1/8". I'm worried it will introduce air into the wort or water.

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Electric BrewGaLoo 2.0 Automated Brutus 20 8-Valve System Squeeky Automated Brewing Forum 58 09-21-2014 12:59 AM
Automated Brewery Valve Layout Diagrams Squeeky Automated Brewing Forum 44 03-09-2013 12:23 AM


Forum Jump