Hepa filter testing dop penetration


Chat With Us Ask an Expert Contact Us. Involving highly specific and technical guidelines to ensure consistent testing, as well as being a part of your regulatory obligations, the HEPA filter testing for your specialist ventilation system should be carried out by professionally qualified engineers to avoid costly mistakes. Normally working in pairs the lead engineer operating the photometer will maintain regular communication with the support engineer controlling the smoke generator by means of site radio or mobile phones. This "hot" DOP aerosol has a very narrow particle size distribution monodisperse. Login Pay Bill Quote Testing Find a Test Submit a Sample International Shipments Get a Quote. This in-place penetration test is compared to the current in-place leak test using light scattering photometers for single HEPA filter installations and for HEPA filter plenums using the shroud method.
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For each test, the average aerosol concentration is measured both upstream and downstream of the filter with a photometer. The DOP aerosol used to challenge HEPA filters to test for efficiency by this standard is known as "hot" or "thermally generated" DOP because it is derived from heated dioctylpthalate oil. Access to the filters was difficult. Proposed retrofit of HEPA filter plenums with injection and sampling manifolds for in-place filter testing Fretthold, J. Changes in methods were difficult to make. This in-place penetration test is compared to the current in-place leak test using light scattering photometers for single HEPA filter installations and for HEPA filter plenums using the shroud method.
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HEPA Filter Testing

DOP aerosol can be generated in the field but the equipment used, while relatively simple and portable, cannot produce truly "hot" DOP that is monodisperse. The plenums were large, which caused air dispersal problems. Further development of the procedure is also required to reduce the test time before the in-place penetration test is practical. Lawrence Livermore National Lab.
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Hepa filter testing dop penetration
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Hepa filter testing dop penetration
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Hepa filter testing dop penetration



Description: The requirement may be due to problems caused by the presence of particulates or physiological problems caused by viable airborne organisms. It is also used by air filter manufacturers and various testing agencies to make an aerosol to test the effectiveness of air filters. DOP dioctylpthalate is an oil commonly used with vinyl resins to make soft vinyl plastics. The penetration or efficiency of a filter is strongly affected by the particle size of the challenge aerosol.

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