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<div>Adam,</div><div>Interesting question.</div><div>Ours is set at 0.08 - 0.1 inches water column = 20-25 Pa</div><div>45 - 60 Pa seems excessive.</div><div><br></div><div>I reviewed "Cleanroom Technology" by William Whyte <br></div><div>(2nd Ed, pg 69) <br></div><div>"Differential pressure of 10 Pa between two cleanrooms, and 15 Pa <br></div><div>between a cleanroom and an unclassified area, are reasonable <br></div><div>minimum design pressures."</div><div><br></div><div>I do not have data on particle count vs diff pressure.</div><div>When we above ~ 0.2 (50 Pa) our doors begin to have trouble latching automatically.</div><div><br></div><div>Bill Flounders</div><div>UC Berkeley<br></div>
</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 6, 2022 at 3:38 PM Adam Pettigrew <<a href="mailto:apettigr@ualberta.ca">apettigr@ualberta.ca</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hey All,<div><br></div><div>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.</div><div><br></div><div>Thanks,</div><div>Adam<br clear="all"><div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div dir="ltr" style="color:rgb(34,34,34)"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><p style="font-size:x-small;line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="color:rgb(0,0,0);font-family:Arial;white-space:pre-wrap;line-height:1.38;background-color:transparent">Adam Pettigrew</span></p><p style="font-size:x-small;line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="color:rgb(0,0,0);font-family:Arial;white-space:pre-wrap;line-height:1.38;background-color:transparent">Systems Technician</span><br></p><p dir="ltr" style="font-size:x-small;line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">University of Alberta - nanoFAB</span></p><p dir="ltr" style="font-size:x-small;line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">W1-028A ECERF Building</span></p><p dir="ltr" style="font-size:x-small;line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">9107 - 116 Street</span></p><p dir="ltr" style="font-size:x-small;line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Edmonton, Alberta</span></p><p dir="ltr" style="font-size:x-small;line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Canada T6G 2V4 </span><span style="font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent"> </span><span style="font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent"> </span><span style="font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Ph: 587-879-1514</span></p><span style="font-size:x-small;background-color:transparent;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap"><a href="http://www.nanofab.ualberta.ca/" style="color:rgb(17,85,204)" target="_blank">www.nanofab.ualberta.ca</a></span></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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