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    Results of ASTM Round Robin Tests on Filter Efficiency Using Latex Spheres and on Airflow Resistance

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    A study was run to determine the appropriateness of the proposed ASTM filter efficiency standard procedure [3] at the designated limits of latex sphere diameter and face velocity. An analysis of variance of filter performance from six laboratories was performed in the form of a 22 factorial designed experiment with the variable levels: latex sphere diameter (microns) at .62, .90, 2.02 and face velocity (cm/s) at 1, 5, and 25. Observations were also made on the precision of the ASTM F778-82 Gas Flow Resistance Of Filter Media Standard.


    polymer latex spheres, air filtration, pressure drop, gas permeability, flow resistance

    Author Information:

    Japuntich, Daniel A.
    Research Specialist, 3M,

    Committee/Subcommittee: F21.20

    DOI: 10.1520/STP42087S