Model FRP-81

Industrial Fiberglass Control Damper
Triple-V Blade

The FRP-81 fiberglass damper is used in applications where corrosive air exists for exhaust, air supply or pressure relief. It employs fiberglass triple-V blades, a rugged flanged frame, and options for ultra-low leakage in high pressure applications. The FRP-81 is ideal for high performance air intake and discharge applications.

Standard Construction

Frame: 8" x 2-3/16" x 1/4" (203 x 56 x 6) vinyl ester resin.

Blades: Triple "V" groove 6-5/8" x 5/8" thick (168 x 16). Parallel action.

Axles: 3/4" (19) diameter fiberglass rod.

Linkage: 3/16" x 3/4" (5 x 19) stainless steel tie bars and 3/8" (10) stainless steel pins concealed in frame.

Bearings: Molded PTFE.

Control Shaft: 3/4" (19) stainless steel round drive shaft.

Minimum Size: 8" x 8" (203 x 203)

Maximum Size:
Single section: 48" x 72" (1219 x 1829)
Multisection: Unlimited

Ratings

Leakage with low leakage seals:

10.7 cfm/ft² @ 1 in. wg. (0.051 m³/s/m² @ 0.25 kPa)
21.6 cfm/ft² @ 4 in. wg. (0.11 m³/s/m² @ 1.0 kPa)/
24.3 cfm/ft² @ 5 in. wg. (0.12 m³/s/m² @ 1.5 kPa)

Maximum Temperature: -20^oF to 200^oF (-28^oC to 94^oC)