Bullard Filters and Cartridges - EVA / EVA HL Powered Air Purifying Respirator (PAPR) Multi-Gas Filter Cartridges

HEPA (high efficiency particulate air) filters like the EVA PAPRFC3 are mechanical type filters that collect particles through several different mechanisms, including impaction, interception, gravity and diffusion.

• Impaction – Occurs when particles leave a streamline due to their inertia and are trapped against a filter fiber. Once captured, attractive forces keep the particles against the fiber.
• Interception – Occurs when particles traveling on air streamlines are carried close enough to the filter fiber to be captured.
• Gravity – causes the settling of particles which can bring them closer to a fiber for capture.
• Diffusion – Occurs when very small particles undergo random movements as air molecules bombard them. They are captured as they near a filter fiber.

• NIOSH 42 CFR Part 84
• TC-21C-0836 (EVA PAPR with Loose Fitting Headtops)
• TC-21C-0844 (EVA PAPR with Spectrum Series®)
• TC-21C-0922 (EVAHL PAPR with Loose Fitting Headtops)
• TC-21C-1328 (EVA PAPR with Sightline Series)
• TC-21C-1329 (EVAHL PAPR with Sightline Series)