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)

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

Minimum Size:

6 in. W x 8 in. H

(152mm x 203mm)

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"

• Wing Nut Actuator

ES-41

_FlanE_geS_O-_n4_I2_ntake

Flange On Discharge