Extruded BACKDRAFT DAMPER
DAMPERS AND LOUVERS
ES-30 SERIES
Vertical Mount - Horizontal Airflow
Application and Design
The ES-30 series is a vertical mounted backdraft damper that is
designed to allow horizontal airflow and prevent reverse airflow.
The damper is opened by air pressure differential and closed by
gravity.
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)
H*
Standard Construction
Frame: 6063T5 extruded aluminum.
W*
(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.
NOTE: Optional counterbalance weights shown.
Blade Seals: Vinyl.
3"
2" Max.
3"
2" Max.
3"
2"
Size Limitations
Minimum Size (without weights): 4 in.W x 4 in. H
(102mm x 102mm)
Minimum Size (with weights): 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-31
• 11/2 in. (38mm) Flange On Intake:
• Counterbalance Weights
• Pull Chain Actuator
ES-32
1 1/2"
1 1/2"
2"
2"
2"
ES-30
ES-31
ES-32
Flange On Intake
No Flange
Flange On Discharge
• Wing Nut Actuator
ES-30
No Flange
ES-31
Flange on Discharge
ES-32
Flange on Intake
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