Environmental, Health and Safety Services

Facepiece Seal Protection

At Virginia Tech, employees are prohibited from wearing a tight fitting respirator if:

  • facial hair comes between the sealing surface of the facepiece and the face, or interfere with proper inhalation or exhalation valve function;
  • absence of dentures, facial changes (scars, deep skin creases, etc) or use of jewelry or headgear that projects under the facepiece seal prevent achieving a proper seal.

A user seal check must be performed each time the respirator is put on, and prior to entering a contaminated area or starting a job that requires respiratory protection. The seal check procedure has two parts: a positive pressure and a negative pressure test. This procedure is outlined in Appendix 4. A respirator must pass both checks to function properly and fulfill its purpose.

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