Greenheck BR-30 Series - Manual
Greenheck BR-30 Series – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Application and Design
The BR-30 series is an eccentrically pivoted backdraft damper for low velocity systems. BR-30 series is a vertical mounted
damper and designed to allow horizontal airflow and prevent reverse airflow. To increase sensitivity and reduce blade mounted
counterbalance, the blade skin is formed aluminum. On-blade counterweights are provided to fine tune start-to-open and full
open blade operation. Ball bearings minimize friction.
Recommended Applications:
•
Gravity hood intake and exhaust
• Stairwell pressurization
• Room pressurization
• Ductwork outlets
Poor Applications:
• Propeller fan outlets (high velocity)
• Centrifugal fan outlets (high velocity)
• Building pressurization (sensitive to wind)
• Pressure relief exceeding 0.13 in. wg (32 Pa)
Ratings
Back Pressure:
2.0 in. wg (500 Pa)
Start-to-Open Pressure:
0.05 in. wg (12 Pa)
Velocity:
2000 fpm (10.2m/s)
Temperature:
180°F (82ºC)
Standard Construction
Frame:
Insert mount 16 ga. (1.5mm) galvanized steel
hat channel
Blades:
0.063 in. (1.6mm) thick formed aluminum,
eccentrically pivoted
Axles:
3
/
8
in. (9.5mm) square plated steel
Bearings:
Galvanized steel press-fit ball
Linkage:
Side mounted (out of airstream)
Blade Seals:
Pressure activated vinyl
Counterbalance:
Blade mounted with adjustable
weights
Size Limitations
Minimum Size:
8 in. W x 6 in. H
(203mm x 152mm)
Maximum Panel Size:
48 in. W x 74 in. H
(1220mm x 1880mm)
Options
• EPDM segmented jamb seals
• Stainless steel or aluminum frame
• Stainless steel axles and linkage
• Type 316 ball bearings with acetal races
• Selectable start open from .05 to .13 in. wg (12 Pa - 32 Pa)
BR-30 SERIES
Vertical Mount Horizontal Airflow
BAROMETRIC RELIEF DAMPER
ADJUSTABLE COUNTERBALANCE
DAMPERS AND LOUVERS
*W & H dimensions furnished approximately
1
/
4
in.(6mm) under size.
1.5 in.
5 in.
1 in.
MAX
4 3/8 in.
MAX
1.5 in.
BR-30
No flange
BR-31
Flange on
Discharge
BR-32
Flange on
Intake
Airflow
H*
W*
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