Model CD-91R
Bubble-Tight Damper
Single Blade - Round
The CD-91R is an industrial control damper designed for isolation and decontamination applications. Bubble-tight dampers are designed to have the lowest leakage ratings possible. Typical applications include industrial processing plants, laboratories, clean rooms, pharmaceutical facilities, nuclear facilities, DOE facilities, and other applications that require extremely low leakage. The CD-91R is tested for bubble-tight leakage ratings in accordance with AMCA 500-D up to 10 in. wg (2.5kPa). The damper frame is flanged for easy mounting and the blade seal is mechanically fastened to the blade.
Standard Construction
Frame: Steel channel
Blades: Steel round.
Blade Stops: Full open and full closed position pin stop.
Axles: Plated steel.
Axle Seals: Double gland.
Bearings: Relubricable ball bearing, outboard mounting.
Control Shaft: 6" (152) long round drive axle.
Finish: Hi-Pro poly powder coat, gray. (Two year warranty)
Minimum Size: 4" Ø (102 Ø)
Maximum Size: 36" Ø (914 Ø)
Lifting Lugs: Four 1" (25) lifting lugs provided on dampers > 16" Ø (406 Ø)
Ratings
Leakage: Bubble-tight in accordance with AMCA-500D
Maximum Pressure: 10 in. wg. (2.5 kPa) - differential pressure
Maximum Velocity: 4000 fpm (33 m/s)
Temperature:
Minimum: -40oF (-40oC)
Maximum: 250oF (121oC)
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