Greenheck IVDE User Manual
IVDE
CCW
CW
Viewed from
Air Inlet Sid
e
12 in.
EXTERNAL INLET VANE DAMPER
Application and Design
The IVDE is a round external inlet vane damper intended for application in high pressure and velocity systems. Primary
application is on inlet of Class I and Class II fans.
Ratings
Pressure: 8.5 in. wg (2117 Pa) - pressure
differential.
Airflow: See Page 2
Temperature: 200°F (93°C)
Standard Construction
Frame: 10 ga. (3.5mm) steel.
Blades: 16 ga. (1.6mm) steel.
Axles: 1/2 in. (13mm) dia. plated steel.
Bearings: Stainless steel sleeve.
Hub: Open.
Finish: Permatector™ polyester
urethane enamel
Actuator: Manual quadrant
Size Limitations
Minimum Size: 12 in. (304mm) dia.
Maximum Size: 67 in. (1701mm) dia.
Optional Features
• Wide range of electric and pneumatic
actuators available. Factory installation
available.
• Bolt holes in both flanges (8, 12, or 16 holes
available).
• Closed (flat capped) hub.
Dimensional and Airflow Information
12 in.
C**
A*
F
W
B
D
* Inside diameter
** Bolt hole circle diameter. Bolt holes are
optional. Specify "C" within the follwing
limits:
Minimum "C" dimension = A + 15/8 in.
Maximum "C" dimension = A + 2B
A B
Inside Dia. (in.) Max. Dim. Hub Dia. Flange Depth Blades Diameter CFM
12 - 17.5
15
/16 3 13/8 9 6
D F W Number of Mounting Hole Maximum
C
17.51 - 22.5 1 3 11/2 9 8
22.51 - 28.31 1 4 11/2 9 10
28.32 - 33.06 1 4 11/2 9 12
33.07 - 39 1 6 11/2 9 14
39.01 - 49 13/16 6 13/4 10 16
49.01 - 55 17/16 8 2 10 18
**See note above
55.01 - 67 17/16 8 2 11 20
NOTE: Temperatures in excess of 200°F (93°C) require special consideration. All dimensions are in inches.
Specifications
External inlet vane dampers meeting the following
specifications shall be furnished and installed where shown
on plans and/or as described in schedules.
Dampers shall consist of: a 10 ga. (3.5mm) hot-rolled
steel frame; blades fabricated from 16 ga. (1.6mm) hotrolled steel; 1/2 in. (13mm) dia. plated steel axles turning
in stainless steel sleeve bearings; and gray baked enamel
finish.
7
/16 14,200
7
/16 18,000
7
/16 30,000
7
/16 37,500
7
/16 40,600
5
/8 50,800
5
/8 56,000
5
/8 56,000
Damper manufacturer's printed application and
performance data including pressure, airflow (cfm) and
temperature limitations shall be submitted for approval
showing damper suitable for pressures to 8.5 in. wg
(2117 Pa), airflows to 56,000 cfm (26.4 m3/s) and
temperatures to 200°F (93°C).
Basis of design is Greenheck model IVDE.
Copyright© 2005 Greenheck Fan Corporation
IVDE Rev. 2 May 2005
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