FORUM ON BEER, HOMEBREWING, AND RELATED ISSUES
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Contents:
re: Pump ideas ("jeff_ri")
Chloramine Reaction ("A.J deLange")
Is my old grain still good? ("Rich Lynch")
Pumps ("A.J deLange")
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Date: Wed, 5 Nov 2008 08:17:19 -0500
From: "jeff_ri" <jeff_ri at cox.net>
Subject: re: Pump ideas
Hi All,
In HBD #5442 Matt asked about ideas for moving wort/beer to and from oak
barrels.
Instead of a pump, you can always use pressure. If your "from" vessel is
closed, you can pressurize it with CO2 or air and push the liquid from one
container to another. If the "to" vessel is closed, you can pull a vacuum
on it with a vacuum pump and pull the liquid over.
My homebrew club does a yearly group brew that gets fermented/aged in a
used bourbon/whiskey/rum barrel and using pressure to move the wort/beer has
worked well.
Jeff McNally
Tiverton, RI
(652.2 miles, 90.0 deg) A.R.
www.southshorebrewclub.org
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Date: Wed, 05 Nov 2008 09:11:35 -0500
From: "A.J deLange" <ajdel at cox.net>
Subject: Chloramine Reaction
For Aleman: The basic reaction involving metabite and chloramine is:
S2O5(--) + 2H2NCl + 3 H2O --> 2SO4(--) + 2H(+) + 2Cl(-) + 2NH4(+)
The article, Chloramine, at www.wetnewf.org discusses this reaction on
p24 and on p25 there is a table with the amounts of metabite required as
the potassium or the sodium salt and the amount of sulfate, chloride,
ammonium potassium or sodium ion produced.
A.J.
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Date: Wed, 5 Nov 2008 09:29:39 -0500
From: "Rich Lynch" <rlny7575 at gmail.com>
Subject: Is my old grain still good?
Hey HBD,
I haven't brewed much lately, but hope to reverse that trend this
winter. From last years supplies I'm obviously going to ditch
whatever hops I've got, but was wondering what of the grain I could
still use. There's a few bags of opened and twist tie closed base
malt which I wonder about, but also some sealed bags of biscuit,
victory, chocolate, and coffee malts. Are these sealed bags, at least,
still good? How about an opened and twist tie closed bag of priming
sugar? DME?
I usually do 5 gallon partial mashes.
Thanks,
Rich
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Date: Wed, 05 Nov 2008 09:37:23 -0500
From: "A.J deLange" <ajdel at cox.net>
Subject: Pumps
For general purpose pumping (wort, beer, mash) it's hard to beat a
flexible impeller pump. These things will take tremendous abuse i.e. you
can use them to pump hot wort or mash or spent hops out of your kettle
(that's how I clean mine) though eventually, of course, after enough
exposure to heat and solids the impeller crumbles and the seals fail and
both these need to be replaced. They are also a bit dear intially and
getting replacement parts can be a bit tricky as in the following
conversation (reproduced from memory)
Me: "Do you have seals for Zambelli pumps?"
They: "No"
Me: "Do you have any ideas as to where I might get them?"
They: "You'll have to go to the dealer where you got the pump?"
Me: "You sell Zambelli pumps, don't you?"
They: "Yes but you'll have to go to the place you bought yours."
???
Peristaltic pumps are great for their intended purpose which is,
generally, delivering modest measured amounts of liquid or dispensing at
a controlled rate. And they are handy in the sense that you connect the
source to the destination with tubing running the tubing through the
pump head. So they are great for moving samples about in the laboratory
or continuous flow pitching of yeast. They do make models which handle
large tubing and produce more impressive flow rates but these larger
pumps are frighteningly expensive and not just any tubing will work. It
has to be formulated to have the flexiblilty required for peristaltic
pumping. The tubing also wears out (though only the part that contacts
the rotor).
A.J.
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End of HOMEBREW Digest #5444, 11/05/08
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