Greenheck Fan EM-40 dimensions Performance Data, Specifications, Leakage, Pressure Drop

Performance Data EM-40

Performance data results from testing a 36 in. x 36 in.

(914mm x 914mm) damper in accordance with AMCA Standard

500-D using Figure	5.7A (unducted). All data has been corrected
to represent standard air at 0.075 lb/ft3 (1.201 kg/m3).
Operational Data		ÆP in. wg	Veloc-
			ity fpm
		(Pa)
			(m/s)
Damper with Standard	Blades Start to Open	0.07 (17)	50 (.254)
Bearings
	Blades Fully Open	0.20 (50)	1200 (6.2)

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 in. x 36 in. Damper

6

5

4

3

2

Difference
Pressure	1.0
	.9
	.8
Static	.7
	.6
	.5
	.4
	.3
	.2

1 2 3 4 5 6 7 8 9 1 0 20 30 40 50 60

Air Leakage in CFM/Sq. Ft.

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: heavy gauge 6063T5 extruded aluminum channel frame (0.125 in.[3.2mm] thick) with 31Ú8 in. (79mm) depth; blades from 0.070 in.(1.8mm) 6063T5 extruded aluminum; 3/4 in. (19mm) dia. metallic axles turning in acetal bearings; damper shall be equipped with extruded vinyl blade seals; and internal 1/8 in. (3mm) plated steel blade-to-blade linkage. 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 10 in. wg (2491 Pa), velocities to 3500 fpm (18 m/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 EM-40.

Pressure Drop

10

9

8

7

6

5

4

3

2

	1.0
	.9
	.8
wg)	.7
	.6
In.	.5
	.4
(
Loss	.3
Pressure	.2
	.09
	.10

.08

.07

.06

.05

.04

.03

.02

1	2	3	4	5	6 7 8 910	2	3	4	5	6 7	8 910	2	3	4	5	6 7 8 910
			x 10					x 100						x 1000

Velocity (fpm)

Pressure Limitations

	10	10.0 in. w.g.
	8		8.0 in. w.g.
w.g.)	6		6.0 in. w.g.
(in.
Pressure	4			4.0 in. w.g.
	2
	0 0		12	24	36	48
			Damper Width (in.)

Velocity Limitations

	74			2500 fpm
	60
Height (in.)		3000 fpm
Damper	36
		3500 fpm
	0 0
		12	24	36	48
			Damper Width (in.)

Copyright © 2008 Greenheck Fan Corporation EM-40 Rev 4 Aug 2008