Whether the requirement is for a large multiple-section tight shut off outside air intake damper or a small branch duct round balancing damper, we have the model to fit your needs.

All Nailor multi-blade volume control dampers incorporate the following standard design features:

• Double-bolted blade to axle attachment ensures blades do not slip or bow under pressure
• 16 gauge hat channel frame design with mitered corners and die-formed corner gussets provide strength equivalent to 13 gauge channel type frames and help eliminate racking
• 1" dia.  heavy duty full width jack shafting on larger multiple section assemblies.  Eliminate torque twist and ensures even closure across the damper sections.