Determination of known exhalation valve damage using a negative pressure user seal check method on full facepiece respirators.

@article{Delaney2003DeterminationOK,
  title={Determination of known exhalation valve damage using a negative pressure user seal check method on full facepiece respirators.},
  author={Lisa J. Delaney and Roy T McKay and Andrew Freeman},
  journal={Applied occupational and environmental hygiene},
  year={2003},
  volume={18 4},
  pages={237-43}
}
A negative pressure user seal check (NPUSC) method was evaluated for its ability to adequately detect known exhalation valve leakage into a respirator. Three valves with different types of damage were included. Twenty-six test subjects, wearing full facepiece respirators, were asked to perform a NPUSC. Their responses as to whether they passed or failed the… CONTINUE READING