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Old 08-14-2012, 01:18 AM   #11
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Is the "orifice" a colored piece of plastic with a slot?, if so then there should be a snap ring holding it in place. Pop the snap ring and push the plastic orifice out and you should have a nearly full opening ball behind that.

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Old 08-14-2012, 01:49 AM   #12
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Thanks, Yes. I saw that. I don't need the more exacting flow control from that insert? I planned to call Belimo tomorrow to ask about a bigger one. Not necessary ?

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Old 08-14-2012, 11:47 AM   #13
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You can save the plastic for now, but having used these valves in a brew system you will find that you do not need the restriction when working with the low head pressure circulating pumps.

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Old 08-14-2012, 02:15 PM   #14
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Thanks

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Old 08-29-2012, 12:03 AM   #15
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Kladue, how can I get 24VAC pulse control of my Belimo TR24-3 (floating point) without software? I'm looking for cost effective and simple a hardware approach. Thanks in advance!

I have a HERMS and wants to use the Belimo valve as the bypass for my HE so I can automatically control the position of my bypass valve. I continually heat my HLT during the mash so that at the end of the mash I am at sparge temp. So my HE bypass valve (Belimo) needs to be slowly throttled open as the HLT temp rises to maintain a constant HE outlet temp back to Mash Tun.

Or should I order the TR24-SR (proportional) and hook it up to an Auber PID?

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Old 08-29-2012, 01:21 AM   #16
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It will cost a bit more but a PID controller with 0-10V output will simplify the control considerably when using the Belimo SR proportional control actuator. A suitable model from Automation direct would be the SL4824-LR which has a 0-10V output, and has companion software available for setup. You will need 24V to power the valve in addition to the control signal, but the valve works equally well with either 24V DC or AC power so a simple 24V transformer will do the job. Be aware the valve will start to move at 2V input and complete travel at 10V, so do not expect it to move below 20% controller output.
If you are patient and willing to cruise Ebay for process controllers with voltage outputs or 4-20 milliamp outputs you might be able to save some cash.

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Old 08-29-2012, 05:55 PM   #17
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Quote:
Originally Posted by SMc0724 View Post
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.
What flowmeter are you using?
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Old 08-30-2012, 02:43 AM   #18
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Thanks for the help Kladue! I ordered the SL4824-LR (with PC USB adapter), an RTD, and the Belimo SR tonight. Maybe this is a silly question but where do I get a 'simple' 24V transformer? Also, I don't mind the actuator/valve not responding below 20% of the controller output. Could I have avoided this by using the SL4824-CR version with 4-20mA output (the actuator takes either 0-10VDC or 4-20mA)? Just curious.

BTW, you have quite the setup! I'm a nuclear engineer and most of my work is refueling reactors. We have reactor vessel purge systems that are pretty complex but your brew system blows them out of the water! Impressive!

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Old 08-30-2012, 03:07 AM   #19
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Quote:
Originally Posted by nvrstck View Post
...
Maybe this is a silly question but where do I get a 'simple' 24V transformer?
...
Some doorbell transformers can supply 24VAC. They are easy to find and inexpensive.
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Old 08-30-2012, 11:40 AM   #20
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The valves do not draw much power ( about 4 watts) so a 20VA rated 24 volt transformer from Home Depot will work.
I work in the industrial instrumentation field so the brewing system control system design build is like what I have been doing for quite a while.

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