<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello All,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We are planning to purchase a backup air compressor to produce electronics grade air (Grade 1.1.1) for our cleanroom and laboratories here Birck. I am able to source an oil-flooded compressor for about 1/3 the cost of an oil free unit. In order to protect the cleanroom from hydrocarbons, we would need to install a series of particulate filters, separators, oil mist filters, and vapor adsorbers after the compressor. However, it appears we can achieve the air quality we need and still realize a lower system installation cost with an oil-flooded compressor versus an oil-free unit.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Our current air compressor is oil-free and I have little experience with oil-flooded designs. Do any of your facilities use an oil-flooded compressor for Grade 1.1.1 air, and if so what have your experiences been? I’d be interested in learning about filter change frequencies, annual maintenance costs (vs. oil-free), and of course whether there have been any unexpected contamination issues caused directly or indirectly by an oil-flooded compressor (hopefully the latter has not happened). <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you in advance for your thoughts.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:12.0pt'>Jeff Kuhn<o:p></o:p></span></p><p class=MsoNormal>Facility Engineer<o:p></o:p></p><p class=MsoNormal>Birck Nanotechnology Center<o:p></o:p></p><p class=MsoNormal>Purdue University<o:p></o:p></p><p class=MsoNormal>1205 W. State St.<o:p></o:p></p><p class=MsoNormal>West Lafayette, IN 47907<o:p></o:p></p><p class=MsoNormal>Ph: (765) 496-8329<o:p></o:p></p><p class=MsoNormal>Fax: (765) 496-2018<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>