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Low Leakage, Maintenance-Free, Adjustable

Series 7000 CW
Medium-Duty 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:

  • Suitable for applications where dampers are exposed to extended periods of high humidity or high moisture, such as water treatment facilities, municipal pools, and greenhouses.
  • Cost effective alternative to the Salt Water Resistance Option for applications where salt spray is not a concern. (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.)

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

Medium-Duty Backdraft Damper Schedule