Greenheck Fan ES-40 Series dimensions Extruded BACKDRAFT DAMPER, Application and Design, ES-41

Extruded BACKDRAFT DAMPER

ES-40 SERIES

Horizontal Mount Vertical Airflow Down

Application and Design

The ES-40 series is a horizontally mounted backdraft damper that is designed to allow vertical airflow down and prevent reverse airflow. The damper is opened by air pressure differential and closed by gravity. Standard models include adjustable counterbalance weights to assist closing.

Ratings (See page 2 for specific limitations)

Pressure: 2.5 in. wg (622 Pa) - differential pressure Velocity: 2000 fpm (10.2 m/s)

Temperature: 180°F (82ºC)

Standard Construction

Frame: 6063T5 extruded aluminum (0.063 in. [1.6mm] thickness)

Blades: 6063T5 extruded aluminum. (0.050 in. [1.3mm] thickness)

Axle Bearings: Synthetic polycarbonate sleeve type Linkage: 1/8 in. (3mm) aluminum

Blade Seals: Vinyl

Size Limitations

Minimum Size: 6 in. W x 8 in. H

(152mm x 203mm)

Maximum Size: 40 in. W x 52 in. H (1016mm x 1321mm)

Options and Accessories

•11/2 in. (38mm) flange on discharge: ES-41

• 11/2 in. (38mm) flange on intake:		ES-42
•	Pull Chain Actuator
•	Wing Nut Actuator

W*H*

*W & H dimensions furnished approximately 1/4 in. (6mm) under size.

2" Max.

2"

3"

ES-40

No Flange

1 1/2" 1 1/2"

ES-41	ES-42
Flange On Discharge	Flange On Intake

Note: Counterbalance weights may require field adjustment. Instructions are available at www.greenheck.com.