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Low Leakage, Maintenance-Free, Adjustable

Series 7000 CW
Counterweighted Backdraft Damper

Series 7000 CW Backdraft Damper
  • Counterweights are fully adjustable and can be set to relieve air pressure differentials less than .01" w.g.
  • Counterweights are threaded and allow adjustments to be made with only one tool, and brackets are slotted to allow precision slide adjustment of the weights.
  • TAMCO's aluminum construction provides a long, rust-free operational life.
  • Aluminum pivot points are over-sized for additional strength and durability.
  • Self-lubricating Celcon bearings ensure a maintenance-free and long-cycle life.
  • Silicone seals are provided as standard to ensure sealing longevity and remain flexible down to -40° F/C.
  • TAMCO's counterweighted backdraft damper blades are securely linked via a large diameter aluminum linkage rod.
  • TAMCO’s linkage and bearing systems combine to provide durable, maintenance-free performance.
  • TAMCO's counterweighted backdraft dampers are available in Front Flange, In Duct, or Rear Flange mounting types.
  • Series 7000 Counterweighted Backdraft Dampers allow mounting for horizontal airflow, and both airflow up and airflow down operation.

Series 7000 CW Medium-Duty, Maintenance-Free Counterweighted Backdraft Damper:

  • Ideal for installations requiring a maintenance-free backdraft damper with field-adjustable pressure relief.
  • Used to accelerate opening of blades and designed to allow opening at lower pressures and airflow velocities.

MR - Moisture Resistance Option:

  • Excellent solution for high moisture/high humidity applications such as water treatment facilities, municipal pools, and greenhouses.(See Options for more details.)

SW - Salt Water Resistance Option:

  • Ideally suited for coastal climates.
  • Recommended for inland applications, where tire spray from winter-salted roads have been known to corrode dampers installed in close proximity to roads or highways.(See Options for more details.)

Standard air leakage data for Series 7000 Backdraft Dampers is certified under the AMCA Certified Ratings Program.

Air leakage through a 24" x 24" (610mm x 610mm) backdraft damper does not exceed 4.32 cfm/ft² (21.95 l/s/m²) against 1" (0.25 kPa) w.g. differential static pressure at standard air.

MR - Moisture Resistance Option:

  • All zinc-plated steel hardware is replaced with stainless steel, protecting hardware from rust and corrosion when exposed to high humidity or high moisture environments.

SW - Salt Water Resistance Option:

  • Extruded aluminum frames, blades and hardware are clear anodized to a depth of 0.7 mil. (18 microns). This prevents rusting and pitting when backdraft dampers are exposed to salt spray or high humidity environments.
  • All zinc-plated, steel hardware is replaced wtih stainless steel, protecting hardware from rust and corrosion.
  • All aluminum linkage hardware parts are clear anodized.

Series 7000 CW Specifications and Performance Data

Series 7000 CW Suggested Specifications

TAMCO Medium-Duty Backdraft Damper Installation Guidelines