The IMO-310 is a multi-blade fire damper with airfoil style blades used in marine applications.
USCG Approval: Fire Rating A60 for all sizes
ABS Approved (PDA [Product Design Assessment]): A60 for single section, A30 for multi-section
Dynamic Closure Rating
Pressure: Up to 4 in. wg
Velocity: Up to 2000 fpm
Temperature: Up to 212°F