We suggest contamination tolerance = minimize
chlorine using carbon filter, diminish copper to 0.05 ppm, iron 0.065 ppm,
particulates 5u desired but 10u may be smallest practical, separate water
heater with non-copper heat exchanger, PVC piping after treatment Flow rate = 1
gallon pminute with 2 pm desired.
In a University context you may find FSG
dedicated to water systems maintenance for medical facilities. Our is
maintained free of department cost.
From: owner-padg@xxxxxxx [mailto:owner-padg@xxxxxxx]
On Behalf Of Winston Atkins
Sent: Monday, March 26, 2007 11:10
AM
To: padg@xxxxxxx
Subject: [PADG:1434] Water
filtration for conservation lab
Duke University Libraries is planning a new
conservation lab and one of the issues we need to address with our architects
is how to spec out the water filtration system. I'd appreciate advice from you
all regarding:
--
merits of deionization vs reverse osmosis,
--
volume (gals/minute) to request for a large washing sink
--
degree of purity (see paragraph below--our architects' consultants tell us that
getting 3 megohms resistance will be difficult; RO will give us 0.5 to 1.0
megohm resistance, putting in DI beds will give us up around 18 megohm)
--
issues of cost (initial purchase and ongoing maintenance)
--
ease of maintenance.
I've
scouted the ConsDistList for information and have a 1994 exchange, which
includes a recommendation not to go for greater purity than 3 megohms--too
corrosive. I've also reviewed Season Tse's CCI publication on water quality.
Unhappily, it is not prescriptive enough for me. So--I'm going public and would
appreciate any thoughts or guidance you all can provide. I will summarize any off-list
replies and post them.
Thank
you,
Winston
_______________________________
Winston Atkins
Preservation Officer
Duke University Libraries
Campus Box 90189
Durham, NC
27708-0189
winston.atkins@xxxxxxxx
Ph: 919-660-5843 Fax 919-684-2855
_______________________________