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manual abstract
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: Start-to-Open Pressure: Velocity: Temperature: 2.0 in. wg (500 Pa) 0.05 in. wg (12 Pa) 2000 fpm (10.2m/s) 180°F (82°C) 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: % 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 H* *W & H dimensions furnished approximately 1/4 in.(6mm) under size. 4 3/8 in.-MAX Size Limitations Minimum Size: Maximum Panel Size: 8 in. W x 6 in. H (203mm x 152mm) 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) r in. ^—1.5 in. -— f t ? a L—1 in. 1 MAX iÜ — e a ' — ,sâ fill Airflow e b —- h i e 5 in. —- BR-30 No flange BR-31 Flange on Discharge BR-32 Flange on Intake PERFORMANCE DATA BR-30 SERIES Performance data results from testing a 12 in. x 1 2 in. and 36 in. x 36 in. damper in accordance with AMCA Standard 500D using Figure 5.3 (fully ducted), 5.2 (ducted exhausting into an open area), and 5.5 (plenum mounted) . All data has been corrected to represent standard air density at 0.075 lb/ft3 (1.201 kg/m3). Damper size 12 in. x 12 in. Damper size 36 in. x 36 in. 5.5 5.2 / / / / / / / 5.3 / / / / / / / / / ; / / / / / ••• y / TO 5 5.5 ......................77 ......77 // // y 5.3 // / / / / v / / ' r 2000 3000 2000 3Û0Û Velocity (fpm) Velocity (fpm) Specifications Barometric 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: 16 ga. (1.5mm) insert mount galvanized steel hat channel frame with 5 in. (127mm) depth; blades from 0.063 in. (1.6mm) thick formed aluminum, eccentrically pivoted; % in. (9.5mm) square plated steel axles with galvanized steel press-fit ball bearings; damper shall be equipped with pressure activated vinyl blade seals; and internal plated steel blade-to-blade linkage with blade mounted counterbalance weights. 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 in. wg (500 Pa), velocities to 2000 fpm (10.2m/s) and temperatures to 180°F (82°C). Testing and ratings to be in accordance with AMCA Standard 500D. Basis of design is Greenheck model BR-30. fOGREENHECK Re, ?“s I 7-■ P.OiBQX410 SCHOFIELD, WISCONSIN5447*4410 r I I rn m «wtowîT/î Copyright © 2004 Greenheck Fan Corp. wwm.gnunh9ck.com...