Backdraft Damper - Adjustable Counterbalanced - Triple-V Blade - BD-84

Adjustable Counterbalanced Backdraft Damper
Triple-V Blade

The BD-84 backdraft damper employs counterbalanced gravity operated triple-V style blades and a rugged channel frame to restrict reverse airflow and to permit the forward flow of air in the intended direction. Adjustable counterbalances attached to the blades axles permit field adjustment to regulate start-to-open and full blade operation. The BD-84 damper is intended to be mounted vertically in either exhaust or intake installations for medium to high velocity and pressure applications.

Specification

Standard Construction
Frame: 8" x 2" X 14 ga. (203 x 51 x 2.0) galvanized steel channel.
Blades: 6" x 16 ga. (152 x 1.5) galvanized steel - triple-V
Axles: 1/2" (13) diameter plated steel.
Linkage: Concealed in frame.
Bearings: Steel ball bearing, press fit into frame.
Counterbalances: On-blade axle, crankarm and weights - adjustable.
Minimum Size: 6" x 6" (152 x 152)
Maximum Size: 48" x 96" (1219 x 2438)

Ratings
Leakage:
70 cfm/ft² @ 4 in. wg. (0.36 m³/s/m² @ 1.00 kPa) with no seals.
40 cfm/ft² @ 1 in. wg. (0.21 m³/s/m² @ 0.25 kPa) with no seals.
Temperature:
-25^oF to 250^oF (-32^oC to 121^oC) with no seals.
-10^oF to 150^oF (-23^oC to 66^oC) with seals.

Technical specification

Unique ref.Backdraft-Damper-Adjustable-Counterbalanced-Triple-V-Blade-BD-84
Product familyHVAC
Product groupBackdraft Dampers
TypeObject (single object)
Date of publishing2024-07-16
Edition number1

Links

Product urlhttps://www.pottorff.com/product/details/53

Classification

BIMobject CategoryHVAC - Ductwork
Uniclass 2015 CodePr_65_65_24
Uniclass 2015 DescriptionDuct dampers
CSI MasterFormat 2014 Code23 33 13.23
CSI MasterFormat 2014 TitleBackdraft Dampers
OmniClass Number23-33 29 13
OmniClass TitleBackdraft Dampers

Region availability

North America
Anguilla
Antigua and Barbuda
Aruba
Barbados
Belize
Bermuda
British Virgin Islands
Canada
Caribbean Netherlands
Cayman Islands
Collectivity of Saint Martin
Costa Rica
Cuba
Curaçao
Dominica
Dominican Republic
El Salvador
Greenland
Grenada
Guadeloupe
Guatemala
Haiti
Honduras
Jamaica
Martinique
Mexico
Montserrat
Nicaragua
Panama
Puerto Rico
Saint Kitts and Nevis
Saint Lucia
Saint Pierre and Miquelon
Saint Vincent and the Grenadines
Saint-Barthélemy
Sint Maarten
The Bahamas
Trinidad and Tobago
Turks and Caicos Islands
U.S. Virgin Islands
United States