[labnetwork] Cleanroom Pressure Setpoint

[Albert William (Bill) Flounders]

 Adam,
Interesting question.
Ours is set at 0.08 - 0.1 inches water column = 20-25 Pa
45 - 60 Pa seems excessive.

I reviewed "Cleanroom Technology" by William Whyte
(2nd Ed, pg 69)
"Differential pressure of 10 Pa between two cleanrooms, and 15 Pa
between a cleanroom and an unclassified area, are reasonable
minimum design pressures."

I do not have data on particle count vs diff pressure.
When we above ~ 0.2  (50 Pa) our doors begin to have trouble latching
automatically.

Bill Flounders
UC Berkeley

On Wed, Apr 6, 2022 at 3:38 PM Adam Pettigrew <apettigr at ualberta.ca> wrote:

> Hey All,
>
> I am curious what others have as a setpoint for their cleanroom pressure
> relative to an unclean or lower classification cleanroom. I have found some
> information which suggests 10-15Pa is more than sufficient. We have ours
> set quite high at 60Pa but it typically sits at 45Pa. If you have tried
> adjusting the pressure, have you noticed any change in cleanliness/particle
> counts? Any information would be really appreciated.
>
> Thanks,
> Adam
>
> --
>
> Adam Pettigrew
>
> Systems Technician
>
> University of Alberta - nanoFAB
>
> W1-028A ECERF Building
>
> 9107 - 116 Street
>
> Edmonton, Alberta
>
> Canada T6G 2V4 Ph: 587-879-1514
> www.nanofab.ualberta.ca
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