Bullard Filters and Cartridges - EVA / EVA HL Powered Air Purifying Respirator (PAPR) HEPA Filters

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)