Standard Construction
Damper Frame: 5" x 1" (127 x 25) galvanized steel hat channel with interlocking corner gusset. Equivalent to 13 gauge (2.4) channel frame. Low profile head and sill are used in sizes less than 13" (330) high.
Damper Blades: 6" (152) heavy gauge, dual wall extruded aluminum - airfoil. Parallel.
Sleeve: 16" x 20" gauge (406 x 1.0) galvanized steel.
Damper Axles: 1/2" (13) diameter plated steel hex.
Damper Linkage: Concealed in frame.
Damper Bearings: Synthetic.
Seals: PVC blade edge seals. Flexible metal jamb seals.
Damper Actuator: Modulating 24V, spring close, external mount.
Transmitter: VELTRON DPT 2500-plus.
Minimum Size: 8" x 6" (203 x 152)
Maximum Size:
Single Section: 48" x 72" (1219 x 1829)
Multiple Section: 144" x 144" (3658 x 3658)
Ratings
System Velocity Range: 0-4000 fpm (0-20.32 m/s)
Maximum System Pressure: 2 in. wg. (0.50 kPa)
Leakage:
3.0 cfm/ft2 @ 1.0 in. wg. (0.015 m3/s/m2 @ 0.25 kPa)
4.0 cfm/ft2 @ 1.0 in. wg. (0.02 m3/s/m2 @ 0.25 kPa)
8.0 cfm/ft2 @ 4.0 in. wg. (0.041 m3/s/m2 @ 1.0 kPa)
9.7 cfm/ft2 @ 6.0 in. wg. (0.049 m3/s/m2 @ 1.5 kPa)