Standard Damper

Opposed Blade Aluminum Damper

Our Standard Opposed Blade Dampers feature a 100mm / nominal 4” air foil blade, all aluminum construction, and a fiberglass reinforced nylon gearing system that is housed internally. No failure due to rust, corrosion, or debris accumulation. Class 2 AMCA Certified. All of our dampers are made to order with short lead times. Single and multi-sectional dampers can be easily made for normal open/close operation as well as face & bypass operation.

Product Construction Details:


Material: Aluminum 6063
Dimension: 4 in / 100 mm
Treatment: T5
Finish: Mill
Gasket: Thermoplastic Rubber

Nominal 5 in wide, U-shape

Blade Blocks
Material: Polyammide and fiberglass PA6 + GF 20%
Color: Black

Material: Copolymer polypropylene and fiberglass
*Optional flame retardant V-5

1/2 in Square Control Shaft
*Optional die-cast aluminum handle

Working Temperature
Minimum: -20 °C
Maximum: 80 °C
Single Section Maximum Width: 55 in.

Download Spec Sheet

MFS 2019 Standard Damper Spec Sheet