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Our Products

Balancing/Regulating Dampers
Precision/Flow™ Regulators
Remote Control Bowden Cable
Remote Control Power/Balance™
Remote Control Twisting Cable
Control & Backdraft Dampers
Backdraft Dampers
IRIS Damper
Rectangular Dampers
Round Dampers
Small Motorized Rectangular Dampers
Small Motorized Round Dampers
Doors
Access Doors
Plenum Access Doors
Drop Plenum Diffusers
Industrial Dampers
Blast Dampers
Industrial Backdraft Dampers
Rectangular Industrial Dampers
Round Industrial Dampers
Life Safety Dampers
Ceiling Radiation (Fire) Dampers
Combination Fire/Smoke Dampers
Dynamic Fire Dampers
Smoke Dampers
Static Fire Dampers
Louvers
Acoustical Louvers
Adjustable Louvers
Blast Louvers
Brick Vents
Combination Louver/Damper
Dade County Hurricane Louvers
Equipment Screens
FEMA 361 Louver/Grille
Fixed Louvers
PTAC Grilles
Wind-Driven Rain / Sand Louvers
Misc. Products
Control Damper Act.
Duct Smoke Detectors
Life Safety Actuators
Plenums
Security Bars & Grilles
VAV Terminals
Penthouses
Roof Curbs and Rails
Conventional Curbs
Conventional Rails
Curb Adapters
Metal Building Curbs
Metal Building Rails
Sunshades
Vent Hoods
Vent Hoods
Wall Intake Hoods

Rectangular Industrial Dampers

Heavy-duty rectangular control dampers for industrial applications features that enable them to meet all high temperature, high pressure airflow modulation and shutoff applications.

NAH-720-1, NAH -721-1

Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 20 w.g."
Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 20 w.g."

Product Overview

Model NAH-720-1 (Opposed Blade), NAH-721-1 (Parallel Blade) are heavy duty flanged frame style industrial control damper that has steel formed airfoil blades.

  • Static Pressures up to 20 WG
  • Parallel or Opposed Blades
  • Optional Stainless-Steel Construction
  • Optional Bearing Types
Product Information
More Rectangular Industrial Dampers
Heavy Duty, Flanged, All Steel, up to 10 w.g."
H-420, H-421
Heavy Duty, Flanged, All Steel, up to 10 w.g."
Heavy Duty, Flanged, All Steel, up to 20 w.g."
H-620, H-621
Heavy Duty, Flanged, All Steel, up to 20 w.g."
Heavy Duty, Flanged, Steel Frame, Aluminum Airfoil Blades, up to 13 w.g."
AH-620, AH-621
Heavy Duty, Flanged, Steel Frame, Aluminum Airfoil Blades, up to 13 w.g."
Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 30 w.g."
NAH-720-2, NAH-721-2
Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 30 w.g."
Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 35 w.g."
NAH-720-3, NAH-721-3
Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 35 w.g."
Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 40 w.g."
NAH-720-4, NAH-/721-4
Heavy Duty, Flanged, All Steel, Airfoil Blades, up to 40 w.g."