Model TD-93
Industrial Control Damper
Airfoil Blade
TD-93 industrial control dampers are specifically engineered and qualified for use in transit tunnel systems where tight shutoff at high velocity and/or pressure is required. The TD93 and TD-94 meet the demanding requirements for strength, leakage, and operability in accordance with NFPA-130, NFPA502, and UL-555S.
Standard Construction
Frame: 8" x 2" x 12 gauge (203 x 51 x 2.8) galvanized steel channel.
Blades: 14 gauge (2) 6063-T5 extruded aluminum airfoil with metal-to-metal blade overlap. Parallel.
Axles: 3/4" (19) diameter stainless steel.
Linkage: 3/16" x 3/4" (5 x 19) tie bars and 3/8" (10) pivot pins concealed in frame. All components are stainless steel.
Bearings: Oil impregnated sintered stainless steel sleeve pressed into frame.
Control Shaft: 3/4" x 10" (19 x 254) round drive axle with shaft support bracket and bearing mounted to damper frame with factory mounted manual locking quadrant.
Blade Seal: Silicone, mechanically locked into blade.
Jamb Seal: Flexible stainless steel compression type.
Lifting Lugs: 7/8" (22) diameter, one on each jamb of frame.
Minimum Size:
12" x 12" (305 x 305)
Maximum Size:
Single Section: 48" x 96" (1219 x 2438)
Multiple Section: Unlimited
Ratings
Leakage:
1.3 cfm/ft2 @ 2.0 in. wg. (0.007 m3/s/m2 @ 0.5 kPa)
2.0 cfm/ft2 @ 5.0 in. wg. (0.01 m3/s/m2 @ 1.25 kPa)
4.0 cfm/ft2 @ 8.0 in. wg. (0.02 m3/s/m2 @ 2.0 kPa)
8.0 cfm/ft2 @ 15.0 in. wg. (0.04 m3/s/m2 @ 3.75 kPa)
34.0 cfm/ft2 @ 22.0 in. wg. (0.17 m3/s/m2 @ 5.5 kPa)
Temperature:
4820F (2500C) for 1 hour per NFPA-130
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