This steel frame, nonmetallic blade backdraft damper features:
• 60% free area.
• Exceptional strength and tear resistance.
• Resistance to moisture, mildew, and rot as well as to most oils,
chemicals, and grease.
• Quiet operation with no metallic noises.
• Fire resistance through fire retardant, noncombustible coating.
• Long, dependable operation with no mechanical pivots.
| Symbol |
Profile: Manufacturer Headquarters:  Business area: Global Establishment date: 1958 Employees: 1000+ Assortment: Dampers , louvers, air measuring systems, ERVs |
|---|---|
| NMS2 |
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FRAME
16 gage (1.6) galvanized steel.
BLADES
Neoprene coated fiberglass.
REAR GRILL
Galvanized expanded metal.
MINIMUM SIZE
6" w x 4"h (152 x 102).
MAXIMUM SIZE
None. Damper will be fabricated in two or more sections when
height exceeds 24" (610) or width exceeds 30" (762).
CAUTION: Do not use for fan discharge.
TEMPERATURE LIMITS
-30˚F (-34˚C) minimum and +200˚F (93˚C) maximum.
MAXIMUM VELOCITIES
System - 1000 fpm
Spot - 1200 fpm
