287170-2 - Miller PAPR HEPA Filter Replacement Kit (2-Pack)

Technical Overview of Miller 287170-2 HEPA Filters

The Miller 287170-2 is a specialized consumable kit containing two High-Efficiency Particulate Air (HEPA) filters designed for use with Miller Electric's Powered Air Purifying Respirator (PAPR) systems. These filters are engineered to meet strict industrial hygiene requirements, providing a filtration efficiency of 99.97% against airborne particulates as small as 0.3 microns. This level of filtration is critical for compliance in environments where welders are exposed to hazardous metal fumes, including hexavalent chromium, manganese, zinc oxide, and other byproducts of welding, gouging, and grinding operations.

This specific SKU serves as a direct, NIOSH-approved replacement for the discontinued Miller 235673-2 filter, ensuring backward compatibility with the original Miller PAPR blower units as well as the updated PAPR II systems. The filter media is constructed to trap solid dust particles and liquid mists without significantly impeding airflow, provided the filters are changed according to the manufacturer's maintenance schedule. Maintaining proper airflow is essential not only for user safety but also for the longevity of the blower motor, as clogged filters can cause the unit to strain and overheat.

The 287170-2 package ensures that facilities and operators have immediate access to replacement media, reducing downtime. The filters feature a robust housing that ensures a proper seal within the blower assembly, preventing bypass leakage that could compromise the assigned protection factor (APF) of the respirator system. These filters are strictly particulate filters and do not provide protection against organic vapors or gases unless used in conjunction with specific pre-filters or cartridges designed for such hazards, though the 287170 is primarily a HEPA particulate solution.