M8A3 Filter System
This self-contained blower provides CBRN purified air for up to four people when used in conjunction with protective masks such as the M42.
- 12-cfm airflow with iris valve control
- Mounting frame and hardware
- Dust plugs
- 4- and 6-foot supply hoses standard
- 2- and 9-foot supply hoses available
The M8A3 CBRN filtration system is the smallest and least expensive form of collection protection used by the U.S. military today. A single filter unit supplies filtered air via hoses to vehicle crewmembers, providing individuals with protection against CBRN agents while maintaining the flow of fresh filtered air to the mask.
The forced air into the mask converts the mask from a negative-pressure protection into a positive-pressure protection. The system provides enough air for breathing, as well as defogging the mask lenses and compensating for irregular fitting of the mask over the face. The system consists of an M2A2 air purifier, hose assemblies and installation hardware. The M2A2, the main filter unit, contains the blower, dust separator and gas and particulate filters.
When using the M8A3 system, the M2A2 air purifier is mounted inside the vehicle. Contaminated air is pulled into the unit by a centrifugal fan and then passed through a dust separator, which removes coarse particles from the airstream and discharges them through openings in the back of the system. The air passes through an M13 particulate filter that removes toxic particles and aerosols at an efficiency of 99.97% at .3 microns and an M12A2 gas filter that removes gaseous contaminants from the airstream. The purified air is then distributed individually to vehicle crew air masks via air supply hoses.
The M8A3 is used in vehicles that cannot be pressurized or their operational mode requires open doors, such as certain classes of tactical vehicle or an ambulance.