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I have a GB4 arriving this week (a big thanks to @punkin!!) and I'm all prepped with clean and filtered hearts of hearts neutral and ingredients mentioned in the GB4 online instruction manual. BUT I am a little confused as to the ideal configuration for vapor infusing Gin.
My equipment - I have a 4" 5 plate Crystal Dragon on a 50L keg boiler with 2 x 2400w elements. The bottom element is covered at 10L and the top element is covered at 20L. Obviously being modular I can easily convert the config to a pot. I have 15.6L of 35% hearts that was stripped from 200L of tpw, aggressive cuts were made in the spirit run, then watered down to 35% to run thru my carbon filter in attempt to make the cleanest base neutral to start from. When watered down to near 20% the total volume in the boiler will be 25L.
Config 1 - It has been suggested by another fellow distiller to run thru the 5 plates again with the GB4 mounted above the RC. The reasoning is it will further clean up the distillate and allow me to bleed off the small amount of heads if any before inserting the gin basket at the start of hearts by putting it back into full reflux. Fair point and I agree.
Config 2 - Set up in Pot mode as suggested in the instruction manual.
Now this is where it gets interesting. I have read that the still needs to be run harder to push the vapors thru the GB4 and the botanicals in the basket become woody and bitter around the 45 to 50 min mark. So I'm guessing the batch size needs to match the botanical run time. I reckon I'll get about 4.5 to 5L of product back from this 25L of neutral base. So in theory I'll need to run at 9 to 10L per hour. This rate is not possible thru my 4" 5 plate CD. When set up in Pot config however, I usually strip my washes at 8 to 9L per hour with both elements blasting away. This time frame better suits the exposure of the botanicals.
Oh gee....did I just answer my own question!!! ha.
Well...I guess I'm just calling on the other gin junkies out there for advise. I'm not after your secret recipe, thought I would like to hear your configurations and how you run them and your ideas about the length of time you run them for??
Thanks for reading.