[labnetwork] Particle filters on bulk N2

[Kevin Hensley]

Iulian,
We installed 0.01 um filters down stream of our aluminum evaporator.  The
install was recent so I do not yet have long term data on replacement
intervals.  If 0.003 um is necessary for your lab, you might consider a
larger pore pre-filter upstream.
Items to consider:
The cost of the filter housing and installation will be much more than the
cost of the replacement filters.
The filters need to be plumbed to enable filter change without interrupting
supply to the labs. (we accomplished this with 2 filters in parallel).
There needs to be a method of purging the filters and manifold after filter
change.
Make sure that the filters' CFM rating is equal to or greater than the
capacity of the evaporator so you don't limit the supply capacity.
Install pressure gauges both sides of each filter to allow for differential
pressure readings. (this will allow you to determine when filter change is
necessary).

Kevin Hensley
--
Cleanroom Infrastructure Specialist
Utah Nanofab
www.nanofab.utah.edu
Office: 801/587-0658
Cell: 801/403-6038
Email: khensley at eng.utah.edu



On Wed, Nov 6, 2013 at 4:08 PM, Iulian Codreanu <codreanu at udel.edu> wrote:

> Esteemed Colleagues,
>
> What is the micron rating of the filters you use after the vaporizers on
> your bulk N2 system?  Would a 0.003 um filter clog too fast in a system
> with brazed Cu piping and aluminum vaporizers?
>
> Thank you very much.
>
> Iulian
>
> --
> iulian Codreanu, Ph.D.
> Director of Operations, UD NanoFab
> University of Delaware
> 149 Evans Hall
> Newark, DE 19716
> 302-831-2784
>
>
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