Greenheck Fan Ventilation Hood ES 40 Series User Manual

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)  
W*  
H*  
Standard Construction  
Frame: 6063T5 extruded aluminum  
(0.063 in. [1.6mm] thickness)  
Blades: 6063T5 extruded aluminum.  
(0.050 in. [1.3mm] thickness)  
*W & H dimensions furnished approximately 1/4 in. (6mm) under size.  
Axle Bearings: Synthetic polycarbonate sleeve type  
Linkage: 1/8 in. (3mm) aluminum  
Blade Seals: Vinyl  
2" Max.  
Size Limitations  
2"  
Minimum Size:  
6 in. W x 8 in. H  
(152mm x 203mm)  
3"  
Maximum Size: 40 in. W x 52 in. H  
(1016mm x 1321mm)  
ES-40  
No Flange  
Options and Accessories  
• 11/2 in. (38mm) flange on discharge: ES-41  
• 11/2 in. (38mm) flange on intake:  
• Pull Chain Actuator  
ES-42  
1 1/2"  
1 1/2"  
• Wing Nut Actuator  
ES-41  
FlanEgeSO-n4I2ntake  
Flange On Discharge  
 

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