Rectangular
PR-10
Pressure Relief Damper, Single Thickness Blade, Galvanized Steel Construction, Hat Channel Frame, 2" wg Max Pressure, 3000 fpm Max Velocity, 250° F Max Temperature w/o Seals, 150° F Max Temperature with Seals
PR-11
Pressure Relief Damper, Single Thickness Blade, Galvanized Steel Construction, Channel Frame, 5" wg Max Pressure, 3900 fpm Max Velocity, 250° F Max Temperature w/o Seals, 150° F Max Temperature with Seals
PR-12
Pressure Relief Damper, End Pivoted Airfoil Blade, Galvanized Steel Construction, Channel Frame, 8.5" wg Max Pressure, 5150 fpm Max Velocity, 250° F Max Temperature w/o Seals, 150° F Max Temperature with Seals
PR-13
Pressure Relief Damper, End Pivoted Airfoil Blade, Galvanized Steel Construction, Hat Channel Frame, 13.5" wg Max Pressure, 6400 fpm Max Velocity, 250° F Max Temperature w/o Seals, 150° F Max Temperature with Seals