Backdraft damper, vertical mount, Model WD-330, 9 In Sq, No Flange, Performance up to 2,500 ft/min

$136.00

The WD-330 series dampers are designed to prevent reverse airflow in horizontal exhaust applications. The WD-330 features a pressure sensitive blade design that opens and remains open under low velocity conditions. The dampers are opened by air pressure differential and closed by gravity. Galvanized steel, flangeless frame.

Width and height furnished approximately 0.125 in. under size

SKU: WD330-9X9

Ships From: Greenheck

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Available In: 5-7 Business Days

Product Specifications
Performance
Dimensional Drawing
Literature
Certifications

Dimension
H	8.875 in
W	8.875 in

Dimensions
Damper Width x Damper Height The "ACTUAL" damper width and height. Dampers are undersized to allow them to be mounted into the duct work/wall opening.	9 x 9 in
Width Describes the width of a given product.	9 in
Height The height of a given product.	9 in
Weight Weight	4 lbs

Performance
Max Velocity The recommended maximum speed at which air should pass through an HVAC opening.	2500
Pressure Differential Max Describes the maximum static pressure that a given damper can withstand and still be fully operational in an HVAC system.	2

Application
Mounting Position Refers to the orientation in which a product can be mounted.	Vertical

Construction Features
Frame Material Construction material of the frame of a given product.	Galvanized Steel
Frame Gauge Material thickness of the frame on a particular damper.	18
Frame Type Frame Type	No Flange
Blade Material Construction material of the blades on a product.	Roll formed aluminum
Blade Gauge Material thickness of the blades on a particular damper.	0.025

General
Unit of Measure Unit of Measure	ea
Warranty Length Warranty Length	1 Year

Products specifications

Unit of Measure	ea
Mounting Position	Vertical
Frame Material	Galvanized Steel
Frame Gauge
Frame Type	No Flange
Blade Material	Roll formed aluminum
Blade Gauge
Warranty Length	1 Year
Damper Width x Damper Height	9 x 9 in
Width
Height
Weight
Max Velocity
Pressure Differential Max	2

Backdraft damper, vertical mount, Model WD-330, 9 In Sq, No Flange, Performance up to 2,500 ft/min

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