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Wholly Owned Subsidiary of Flanders Corporation |
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In-Place Efficiency Test Housings |
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Many filter systems are associated with "critical applications". A critical application is one that uses material in its process which could be harmful to health and the surrounding area. In these critical applications, the installed filters must remove the dangerous material. Appropriate regulatory agencies often mandate in-place efficiency testing as a prerequisite before the critical filter system becomes operational. Most installed filter systems are in-place tested
per ASME N510, "Testing of Nuclear Air Treatment Systems". The ASME In-place efficiency test sections are designed to perform acceptance and surveillance tests on banks of HEPA filters and/or adsorbers (HEGA) per the intent of ASME N510. Three types of test sections are available. These are the Inlet (upstream), Combination (middle), and Outlet (downstream) test sections. The inlet test sections are designed to be located upstream of filter banks to introduce, mix, and sample aerosol or vapor challenge in the airstream for the first bank of filters. The inlet test sections are available with or without prefilter sections. The combination test sections are designed to be located in systems that have multiple banks of filters. Its location between banks of filters will sample the penetrant in the air for the upstream bank of filters, and introduce challenge for the downstream bank of filters. Single point sampling is provided for both the incoming and exiting air. The outlet test sections provide for single point sampling of penetration by-passing the preceding filter bank. All Flanders/CSC in-place efficiency test section housings are designed for high integrity and built to the same leak tightness and quality standards as the containment filter housings.
A wide assortment of options are available for all housings. |
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N510 test determines the gross aerosol bypassing the HEPA
filter(s) or carbon adsorber(s). The N510 test procedure requires that the filter system
meet a series of pretests to assure testability. After the pretests are completed, a
challenge agent is injected upstream of the HEPA filter(s) or carbon
adsorber(s). An upstream and downstream concentration is determined, and a system
penetration is calculated. The penetration is compared to the acceptance criteria. The
system passes, and is operational, or fails and requires corrective action.