Determination of Known Exhalation Valve Damage Using a Negative Pressure User Seal Check Method on Full Face Respirators

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Table of Contents

Determination of Known Exhalation Valve Damage Using a Negative Pressure User Seal Check Method on Full Face Respirators

Respirator Leakage Pathways

Exhalation Valves

Regulations and Recommendations

Negative Pressure User Seal Check (NPUSC)

Respirator Leak Checkerô

Hypotheses

Materials

Materials conít.

Test Protocol

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Modifications from OSHA Protocol

Modifications from OSHA Protocol conít.

Data Analysis

Test Subject Characteristics

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PPT Slide

Relationship Between Fit Factors and Percent Failing/Unsure NPUSCs

In-Mask Pressure Differential Measurements During NPUSC

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PPT Slide

Conclusions

Acknowledgements

Author: Lisa Delaney

Email: jmyers@aiha.org

Home Page: http://www.aiha.org

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