[labnetwork] Steam Humidifier system question

[Rizik]

If you are installing a new humidification grid in an existing air handler
or installing a new air handler just make sure that the grid and nozzles are
made of at least SS316. With this, rouging/rusting wouldn't occur. The least
quality water you want to use is RO water especially for Cleanroom
operation. 

Rizik Michael, PE
Principal
Integrated Engineering Services
Office: +408 261 3500, Ext. 201
Cell:      +408 718 0927



-----Original Message-----
From: labnetwork-bounces at mtl.mit.edu [mailto:labnetwork-bounces at mtl.mit.edu]
On Behalf Of Michael Khbeis
Sent: Friday, September 14, 2012 4:18 PM
To: Morrison, Richard H., Jr.
Cc: labnetwork at mtl.mit.edu
Subject: Re: [labnetwork] Steam Humidifier system question

Rick,

There are heater kits and/or boiler units that are rated for DI water.
These usually have a stainless element.  Even 1 Megaohm RO can be corrosive
to other metals depending on the incoming water hardness.  I found that
buying the stainless elements and running high quality/pure water is far
less maintenance than cleaning the boiler from impure water deposits, so it
is worth the added upfront cost.

I hope that helps.  

Sincerely,

Dr. Michael Khbeis
Associate Director
Microfabrication Facility (MFF)
University of Washington
Fluke Hall, Box 352143
(O) 206.543.5101
(C) 443.254.5192
khbeis at uw.edu



On Sep 14, 2012, at 12:19 PM, Morrison, Richard H., Jr. wrote:

> Hi All,
>  
> Facilities at my labs want to run 18megohm to a boiler for humidity
control in another lab. I think it should be RO water as 18Megohm water is
very corrosive. Any thoughts on this?
>  
> Their suggested design would draw 0.5gmp from my supply loop and return it
to the DI tank? My belief is that this return water would be contaminated by
the boiler system. What do you guys think?
>  
> Rick
>  
>  
>  
> Draper Laboratory
> Group Leader Microfabrication Operations
> 555 Technology Square
> Cambridge Ma, 02139-3563
>  
> www.draper.com
> rmorrison at draper.com
> W 617-258-3420
> C 508-930-3461
>  
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