Greenheck ES-40 Series Specification Sheet

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
1 / "
1
2
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: / in. (3mm) aluminum
1
8
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

• 1 / in. (38mm) flange on discharge: ES-41
1
2
• 1 / in. (38mm) flange on intake:
1
2
• Pull Chain Actuator
• Wing Nut Actuator
Note: Counterbalance weights may require field adjustment. Instructions are available at www.greenheck.com.
1 / "
1
2
ES-42
1 1 / "
2
2" Max.
3"
BACKDRAFT DAMPER
Extruded
Horizontal Mount Vertical Airflow Down
1 / "
1
2
W*
*W & H dimensions furnished approximately
1 / "
1
2
ES-41
Flange On Discharge
ES-40 SERIES
1 / "
1
2
/ in. (6mm) under size.
1
4
2" Max.
2"
3"
ES-40
No Flange
1 / "
1
2
ES-42
Flange On Intake
H*
2"