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Picture of Backdraft damper, vertical mount, Model WD-330, 18 In Sq, No Flange, Performance up to 2,500 ft/min
Manufacturer: Greenheck

Backdraft damper, vertical mount, Model WD-330, 18 In Sq, No Flange, Performance up to 2,500 ft/min

$186.00

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: WD330-18X18
Ships From: Greenheck

View Related Products

Available In: 5-7 Business Days
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.

18 x 18 in

Width
Describes the width of a given product.

18 in

Height
The height of a given product.

18 in

Weight
Weight

7 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

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.

Related products
Picture of Internal Actuator Kit, Multi Products, MP-310 Act, 115-230V, 50/60HZ, for WD-300 Series, Product # 826841

Internal Actuator Kit, Multi Products, MP-310 Act, 115-230V, 50/60HZ, for WD-300 Series, Product # 826841

826841
$285.00

Model MP-310 is a damper actuator pack used to convert the WD-300 series backdraft damper to motorized operation. These versatile motor packs feature power opening with spring return. The springs also provide damper closure in the event of electrical failure. MP-310 is supplied with mounting hardware, assembly instructions and actuator arms for either single, double, or triple panel installation. Rated for 115-230V. UL listed.

Picture of Internal Actuator Kit, Multi Products, MP-310 Act, 460V, 60HZ, for WD-300 Series, Product # 826846

Internal Actuator Kit, Multi Products, MP-310 Act, 460V, 60HZ, for WD-300 Series, Product # 826846

826846
$381.00

Model MP-310 is a damper actuator pack used to convert the WD-300 series backdraft damper to motorized operation. These versatile motor packs feature power opening with spring return. The springs also provide damper closure in the event of electrical failure. MP-310 is supplied with mounting hardware, assembly instructions and actuator arms for either single, double, or triple panel installation. Rated for 460V. UL listed.

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