The ACT External HEPA Push-Through Filter Assembly. A. A. Frigo, S. G. Wiedmeyer, D. E. Preuss, E. F. Bielick, and R. F. Malecha

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1 by A. A. Frigo, S. G. Wiedmeyer, D. E. Preuss, E. F. Bielick, and R. F. Malecha Argonne National Laboratory Chemical Technology Division 9700 South Cass Avenue Argonne, Illinois Telephone: (630) Fax: (630) Submitted for presentation at: Fourteenth Annual Conference and Exposition of the American Glovebox Society August 21-23,2000 New Orleans, Louisiana The submitted manuscript has been created by the University of Chicago as Operator of Argonne National Laboratory ("Argonne") under Contract No. W ENG-38 with the U.S. Department of Energy. The U. S. Government retains for Itself, and others acting on its behalf, a paid-up, nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the Government. Work supported by the U.S. Department of Energy under Contract W ENG-38

2 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

3 DISCLAIMER Portions of this document may be illegible in electronic Image products. Images are produced from the best available original document

4 PLEASE BE AWARE THAT ALL OF THE MISSING PAGES IN THIS DOCUMENT WERE ORIGINALLY BLANK

5 The ACT/Extertjal HEPA Push-Through.Filt^K Assembly A. A. Frigo, S. G^/Viedmeypr, D. E. Preuss, E#. BielmS. and Ft) FkMalecha // // \ x k # % \ {/ Argonne-NationarLabbratory \\ i Chemical Technology Division j;

6 Example of a Typical In-Line Square HEPA Filter "Push-Through" Filter Design

7 Filter Change Procedure HEPA Filter #3 HEPA Filter #2 Bag Unique Design Features Cylindrical housing Stepped housing Testing port Integral transfer bag attachments Standard size mounting flanges

8 Unique Design Features Cylindrical filter element Improved sealing area Easily compacted for less waste Utilizes standard-size commercially available HEPA filter Filter-mounted handles provide flow cavity Clean filter ready to be "pushed" into service Unique Design Features Cylindrical seals Easily fabricated gasket rings Quality seal without concern for gasket loading Multiple configuration provides redundancy -! 1

9 Support rings Unique Design Features Help to support the seals Allows the unit to be installed in any orientation Unique Design Features Risk minimization for operator contamination Both end covers can be removed without exposure Integral transfer bag attachment Downstream piping not exposed to contamination

10 Filter Assembly Components Filter Handle Guide Angle Chevron Seal Hose Clamp Filter Assembly

11 Filter Assembly Filter Housing and End Covers Note Bag Removed for Clarity End Covers

12 Filter Housing with Installed End Covers Filter Assembly Being Installed

13 Clean Filter Assembly Installed and Ready to Be "Pushed Through" Active Filter Assembly in Position Note Bag Removed for Clarity 10

14 Challenge Aerosol Introduction Port Filter Housing in Vertical Orientation 11

15 Internal View of Filter Housing Machined Step to Ensure Seal Integrity When "Pushing" a Filter Assembly into the Active Position Installation Example 12

16 Conclusions Adds innovation to previously existing ideas Successfully bench-tested Cost Estimates to Change Filter - currently used tenting method: $ using Push-Through design: $500 Reduces possibility of contaminant release Status Patent application filed Two beta versions to be installed at Argonne National Laboratory Looking for an industrial partner to help complete the development and to market the ACT External HEPA Push- Through Filter Assembly 13

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