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Greenheck EM-30 Series Specification Sheet

Greenheck EM-30 Series Specification Sheet

Greenheck fan corporation backdraft damper specification sheet

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Application and Design
The EM-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: 4.0 - 10.0 in. wg (996 Pa- 2491 Pa)
differential pressure.
Velocity: 2500 to 3500 fpm (13 m/s - 18 m/s)
Temperature: 180°F (82ºC)
Standard Construction
Frame: Heavy gauge 6063T5 extruded aluminum.
(0.125 in. [3.2mm] thickness)
Blades: Heavy gauge 6063T5 extruded aluminum.
(0.070 in. [1.8mm] thickness)
Axles:
/
in. (19mm) dia. metallic
3
4
Bearings: Synthetic (acetal) sleeve type
Linkage:
/
in. (3mm) plated steel
1
8
Blade Seals: Vinyl
Size Limitations
Minimum Size (without weights): 8 in. W x 8 in. H
Minimum Size (with weights): 8 in. W x 11 in. H
Maximum Size: 48 in. W x 74 in. H
Sizes larger than maximum shown will be supplied as two or
more equal size smaller dampers required to make up the size
specified. These larger multiple damper assemblies require
field assembly and may require additional reinforcement (not
supplied by Greenheck) to support the assembly.

Options and Accessories

• Counterbalance Weights
• APC (Adjustable Pressure Controller).
Allows field setting of relief pressure on
all EM dampers. Use one per panel.
Maximum recommended pressure set
limitations are as follows:
(EM-30 damper must be equipped with counterbalance.)
Maximum Set
Area ft 2
Pressure
(m 2 )
in. wg (Pa)
4 (.37)
.75 (187)
6 (.56)
.50 (125)
8 (100)
.40 (100)
10 (.93)
.30 (75)
15 (1.39)
.20 (50)
20 (1.86)
.15 (37)
24 (2.23)
.125 (31)
Extruded
(203mm x 203mm)
(203mm x 279mm)
(1219mm x 1880mm)
Airflow
Counterbalance weights may require field adjustment. Instructions are
available at www. greenheck.com.
BACKDRAFT DAMPER
Vertical Mount - Horizontal Airflow
*W & H dimensions furnished approximately
/
* Optional counterbalance weights
11
in.
1
8
dimensioned (
3 in.*
5 in.
/
3
in.
1
8
EM-30
No Flange
EM-30 SERIES
H*
W*
/
in. (6mm) under size.
1
4
/
in. without weights).
5
8
1
/
in.
1
/
in.
1
1
2
2
EM-31
EM-32
Flange On
Flange On
Intake
Discharge

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Summary of Contents for Greenheck EM-30 Series

  • Page 1: Options And Accessories

    Application and Design The EM-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: 4.0 - 10.0 in.
  • Page 2: Performance Data

    Damper Width (in.) Velocity Limitations 8 9 1 0 Air Leakage in CFM/Sq. Ft. 2500 fpm 3000 fpm 3500 fpm Damper Width (in.) Copyright © 2008 Greenheck Fan Corporation EM-30 6 7 8 9 10 x 1000 50 60 EM-30 Rev 4 Aug 2008...