Greenheck Fan BR-30 Series - Manual (Page 2)

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;
3 ⁄ 8 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 (82ºC). Testing and ratings to be in accordance with AMCA Standard 500D.
Basis of design is Greenheck model BR-30.
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/ft
3 (1.201 kg/m 3 ).
BR-30 SERIES PERFORMANCE DATA
BR-30 series
Rev. 1 April 2004
Copyright © 2004 Greenheck Fan Corp.
Damper size
12 in. x 12 in. Damper size
36 in. x 36 in.
Velocity (fpm)
Pressure Loss ( in. wg)
Velocity (fpm)
Pressure Loss ( in. wg)