Greenheck ES-40 Series User manual

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

/8in. (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

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

 • 11

/2in. (38mm) flange on intake: ES-42

 • PullChainActuator

 • WingNutActuator

ES-40 SERIES

Horizontal Mount Vertical Airflow Down

*W & H dimensions furnished approximately 1

/4in. (6mm) under size.

Extruded BACKDRAFT DAMPER

W* H*

ES-40

NoFlange

ES-41

Flange On Discharge ES-42

Flange On Intake

1 1

/2"

1 1

/2"

2" Max.

3" 2" Max.

1 1

/2"

1 1

/2"

2" Max.

3" 2" Max.

1 1

/2"

1 1

/2"

2" Max.

3" 2" Max.

1 1

/2"

1 1

/2"

2" Max.

3" 2" Max.

Note:Counterbalanceweightsmayrequireeldadjustment.Instructionsareavailableatwww.greenheck.com.

ÆP in. wg Velocity

Operational Data (Pa) fpm (m/s)

Blades Start to Open 0.075 (18.7) 110 (.56)

Blades Fully Open 0.30 (74.7) 1150 (5.8)

Specifications

Backdraft dampers meeting the following specifications

shall be furnished and installed where shown on plans and/

or as described in schedules. Dampers shall consist of:

6063T5 extruded aluminum channel frame (0.063 in. [1.6mm]

thick) with 2 in. (51mm) depth; blades from 0.050 in. (1.3mm)

6063T5 extruded aluminum; synthetic polycarbonate axle

bearings;dampershallbeequippedwithextrudedvinylblade

seals; and internal 1

/8in. (3mm) aluminum linkage. Damper

Velocity (fpm)

x 10

Pressure Loss ( In. w.g.)

2 3 4 5 6 7 8 910

1.0

.10

.09

.08

.07

.06

.05

.04

.03

.02

x 100

2 3 4 5 6 7 8 910

x 1000

2 3 4 5 6 7 8 910

Pressure Drop

36” x 36” Damper

LeakagetestingwasconductedinaccordancewithAMCA

Standard500-DandisexpressedasCFMpersq.ft.of

damperfacearea.Alldatahasbeencorrectedtorepresent

standard air at 0.075 lb/ft3 (1.201 kg/m3).

Leakage

36” x 36” Damper

manufacturer’s printed application and performance data

including pressure, velocity and temperature limitations

shall be submitted for approval showing damper suitable

for pressures to 2.5 in. wg (623 Pa), velocities to 2000 fpm

(10.2m/s) and temperatures to 180°F (82ºC). Testing and

ratingstobeinaccordancewithAMCAStandard500-D.

Basis of design is Greenheck model ES-40.

Performance data results from testing a 36” x 36” damper in

accordancewithAMCAStandard500-DusingFigure5.7A

(noducteitherside).Alldatahasbeencorrectedtorepresent

standard air at 0.075 lb/ft3 (1.201 kg/m3).

Leakage Pressure Drop

ES-40Rev3Aug2008

Performance Data ES-40

1.0

Air Leakage in CFM/Sq. Ft.

1 2 3 4 5 6 7 8 910 20 30 40 50 60 70

80 90

100 150

Static Pressure Difference (in. wg)

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