Where is the pressure-demand exhalation valve located?

Where is the pressure-demand exhalation valve located?

• A. Underneath the chin up at the bottom of the nose cup and should be checked daily
• B. On top of the helmet
• C. Behind the head
• D. Inside the facepiece skirt

Answer: (A)

The pressure-demand exhalation valve sits on the facepiece itself. Its job is to vent exhaled air while keeping the inside of the facepiece positively pressurized, so breathing remains easy and contaminants don’t get pulled back in. It’s located on the front of the facepiece, underneath the chin at the bottom edge of the nose cup. This position lets exhaled air escape without interfering with the seal during inhalation. It should be checked daily during the facepiece inspection to ensure it can open freely and isn’t blocked or damaged, with no cracks around the valve. It’s not on top of the helmet, not behind the head, and not inside the facepiece skirt.

The pressure-demand exhalation valve sits on the facepiece itself. Its job is to vent exhaled air while keeping the inside of the facepiece positively pressurized, so breathing remains easy and contaminants don’t get pulled back in. It’s located on the front of the facepiece, underneath the chin at the bottom edge of the nose cup. This position lets exhaled air escape without interfering with the seal during inhalation. It should be checked daily during the facepiece inspection to ensure it can open freely and isn’t blocked or damaged, with no cracks around the valve. It’s not on top of the helmet, not behind the head, and not inside the facepiece skirt.