44200Re: Theoretical plates in a whisk(e)y still?
- Jan 5, 2009Most scottish whisky stills are ex-gin stills from England. Most whisky is
blended whisky i.e. pot still (malt whisky) and Coffey (column) still (grain
whisky) products. Most grain whisky goes to english gin manufacturers. Use
abv output as your guide for a pot still.
--- In Distillers@yahoogroups.com, "Zapata Vive" <zapatavive@...> wrote:
> Actually I'm wondering about whiskey and whisky stills, not pot stills. Yes, a
pot still = 1 plate, pretty much by definition. But a huge copper pot, only half
full, with an exaggerated tapering top, no insulation, and a lyne arm that
sometimes slopes up, does not make a simple pot still. Maybe the "theoretical
plates" are less than 2, but surely more than 1. If not, why don't they just use
flat topped perfectly insulated boilers with just enough headspace to keep the
foam under control?
> You're a pro though, so I won't pull any quotes that discuss the reflux that
occurs in whiskey stills, as I'm sure you've read more than I have on the
subject. But none of the literature that I've read gives any indication for how
much reflux occurs in commercial whiskey stills, just that some does, and the
amount varies from still to still and distillery to distillery.
> So, any ideas how much reflux is going on in those big whiskey stills?
> ----- Original Message -----
> From: Harry
> To: Distillers@yahoogroups.com
> Sent: Tuesday, December 30, 2008 3:17 AM
> Subject: [Distillers] Re: Theoretical plates in a whisk(e)y still?
> --- In Distillers@yahoogroups.com, "Zapata Vive" <zapatavive@> wrote:
> > Anybody have any idea how how many theoretical plates there are in
> whisky or whiskey stills? There is some reflux going on in those
> beautiful pots and lynes, but just how much? Any good guesses out
> Column stills = however many physical plates are put in them (more than
> Brandy stills (eau-de-vie) = 3 to 5 physical plates
> But you were referring to pot stills, yes?
> Pot still = 1 plate
> Pot still + 1 thumper = 2 plates
> Pot still + 2 thumpers = 3 plates
> Getting the pattern?
> Whiskies are usually charged to the spirit still (2nd still) at 27-30%
> a/v. Then given a single distillation, which yields potable spirit at
> around 70+% a/v.
> Use Tony's site to get a handle on this.
> Try the first calculator at 30% and 1 plate.
> regards Harry
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