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 Checker™

Hypotheses

Materials

Materials con’t.

Test Protocol

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Modifications from OSHA Protocol

Modifications from OSHA Protocol con’t.

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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