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What is the recommended RPM for an agitator.
I am looking at RPM for both mashing as well as heat up for a distilling run.
this isn't really answering your question but keep in mind a simple grist hydrator home made or store bought can save you alot of agitator power in the mash tun , because you dont have to deal with doh balls to break up . and you have added bonus of no dust in your mash room .
Thanks. BUT the agitator is a requirement in keeping everything in suspension whilst heating / cooking otherwise I am likely to get element scorching. Also to use whilst heating up so that even and faster heating is realised.
Read all these blog entries, good stuff.
Mixer Direct Blog | mixer basics
Kothe use 150rpm if that helps.
What are StillDragon's agitator / mixers running at ??
10-20x gear reducers are pretty common for tank mixers. Large impellers (24”+) in wide tanks generally have the bigger reductions otherwise things get wicked fast. Long shafts at higher speeds need bracing.
On our 600g mash tun we use a 20x reduction with a 30” impeller, 7/8” shaft, no bracing.
Our 550g fermenters use 25x reduction on 24” impellers, same 7/8” shaft. We went very slow as the shafts are 4’ no bracing.
Thanks @grim. Various gearbox reductions are easy to get in conjunction with a 4 pole 1,400 RPM motor. But it's that magic number of recommended impellar rotation that I am after.
Looking at what you have mentioned above;
Tank mixers - 70-140 RPM
600g - 70 RPM
550g - 56 RPM
@TheMechwarrior indicated 150 RPM for Kothe
I found some other guys mentioning 40 RPM
Surely there must be a guideline for what is recommended.
Using a VSD on a 50Hz basis, you generally do not go below 20Hz for the lowest speed. So my thoughts based on this would be for a full speed of approx 75 RPM and a slow speed of 30 RPM.
Thoughts on this, because you really do not want to stir the crap out of the still with massive vortices ??
30 -40 rpm
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went and took look at the specs on our agitators one is 37 rpm in 425 gallon mash tun the other is 200 rpm in 200 gallon mixing tank . the 37 rpm is nice speed in the mash tun the one in the mixing tank is like a boat motor lol
30 -40 rpm
30 -40 rpm
so if we have plans to use a 2hp vfd on a SD agitator, is there any reason to change the stock gearing? thinking 'no', but being safe!
VFD for speed control? Or just a basic on/off function?
Low RPMs on your set up is never going to whip up any froth. I'd go with a basic 20 amp toggle.
We run the stock agitator at 50hz, does the job and is much quieter.
Use of different speeds ... The idea comes about because of use of it for;
It's 3 totally different mixers.
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