Non-UL Dampers - LnD

Sub Types

Industrial Dampers

Control and balancing dampers for industrial HVAC. Designed and built for heavy-duty applications.

Backdraft Dampers

One-way flow control without an actuator. Backdraft dampers open and close automatically with airflow. Choose from square, rectangular, and round models.

Balancing Dampers

Alleviate drafts and cold/warm spots in your building. Balancing dampers maintain even air pressure across your duct. For smooth and efficient airflow.

Control Dampers

Direct airflow to where it's needed. Our control dampers are designed for efficient airflow. Available for on-off and modulated flow applications.

Multi Zone Dampers

For projects with one HVAC unit. Multi-zone dampers have multiple, independent sections for delivering air to each zone of the building.

Round Dampers

Spiral ducts need round dampers. This category includes control, balancing, and backdraft dampers for round ductwork.

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Non-UL Dampers

Air control, pressure balancing, one-way flow. Our Non-UL dampers keep air moving through your HVAC system.

Products

A28-A29

5" Deep Ultra Low Leak Airfoil Control Damper

Featured

A28, A29

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Airfoil Blade
Blade Action: Parallel / Opposed
Insulation: Uninsulated
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

L517 / L518

5.5" Deep Airfoil Blade Steel Control Damper

Featured

L517, L518

Maximum Velocity (FPM): 5000 fpm
Max Static Pressure: 12 .in w.g. @ 1000 fpm
Pressure Drop: .03 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Airfoil Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: .03 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 5000 fpm (FPM)
Temperature Rating (°F): -40 °F to 200 °F

225-B

2" Deep Light Duty Aluminum Pressure Relief Backdraft Damper

225B

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .14 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Single Thickness Blade
Blade Action: Parallel
Pressure Drop: .14 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

354

6" to 8" Deep Double Deck Multi-Zone Damper

354

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 2 .in w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

356-12

12" Deep Triple Deck Multi-Zone Galvanized Steel Damper

356

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 2 .in w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -20 °F to 140 °F

580-BD

10" Deep Round Industrial Backdraft Damper

580BD

Maximum Velocity (FPM): 6000 fpm
Max Static Pressure: 8 .in w.g. @ 1000 fpm
Pressure Drop: < .1 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Fabricated Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: < .1 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 6000 fpm (FPM)
Temperature Rating (°F): 200 °F

A11

2" Deep Single Blade Aluminum Damper

A11

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .037 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Single Thickness Blade
Blade Action: Single
Pressure Drop: .037 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

AD1

5" Deep Parallel Single Thickness Blade Pin-Lock Control Damper

AD1

Maximum Velocity (FPM): 2500 fpm
Max Static Pressure: 2.5 .in w.g. @ 1000 fpm
Pressure Drop: .03 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Single Thickness Blade
Blade Action: Parallel
Pressure Drop: .03 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2500 fpm (FPM)

AD2

5" Deep Opposed Single Thickness Blade Pin-Lock Control Damper

AD2

Maximum Velocity (FPM): 2500 fpm
Max Static Pressure: 2.5 .in w.g. @ 1000 fpm
Pressure Drop: .03 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Single Thickness Blade
Blade Action: Opposed
Frame Shape: Rectangular
Pressure Drop: .03 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2500 fpm (FPM)

AD5

5" Deep Aluminum Airfoil Blade Damper (Parallel)

AD5

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .04 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Airfoil Blade
Blade Action: Parallel
Pressure Drop: .04 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

AD6

5" Deep Aluminum Airfoil Blade Damper (Opposed)

AD6

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .04 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Airfoil Blade
Blade Action: Opposed
Pressure Drop: .04 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

AF53

Round Single Blade Control Damper with Seals

AF53

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 6 .in w.g. @ 1000 fpm
Pressure Drop: .013 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: .013 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): 250 °F

D1770

4" Deep Single Thickness Blade Steel Control Damper

D1770

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .037 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: .037 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

D182

4" Deep Single Thickness Blade Stainless Steel Control Damper

D182

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .037 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, or 316 Stainless Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: .037 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

D260DW

Dual Wall Insulated Round Single Blade Volume Control Damper

D260DW

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 6 .in w.g. @ 1000 fpm
Pressure Drop: .012 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy, 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: True Round Single Thickness (UVU)
Blade Action: Single
Frame Shape: Round
Pressure Drop: .012 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)

D335

2" Deep Aluminum Backdraft Damper

D335

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .35 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Single Thickness Blade
Blade Action: Parallel
Frame Shape: Rectangular
Pressure Drop: .35 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -40 °F to 190 °F

D388

Galvanized Steel Round Backdraft Damper

D388

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -35 °F to 180 °F

D389

Aluminum Round Backdraft Damper

D389

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -35 °F to 180 °F

D390

Stainless Steel Round Backdraft Damper

D390

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, or 316 Stainless Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -35 °F to 180 °F

D395

4" Deep Single Thickness Blade Low Leakage Control Damper

D395

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .04 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: .04 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

D503

2" Deep Light Duty Stainless Steel Backdraft Damper

D503

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .25 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, or 316 Stainless Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel
Frame Shape: Rectangular
Pressure Drop: .25 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

DID200

Parallel Double Thickness Insulated Blade Control Damper

DID200

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: < .1 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Insulated Airfoil
Blade Action: Parallel
Insulation: Two Part High Density Polyurethane Foam
Pressure Drop: < .1 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

GB1

5.5" Deep Single Thickness Blade Balancing Damper

GB1

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .04 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, or Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel
Pressure Drop: .04 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): 200 °F

GB2

5.5" Deep Single Thickness Blade Balancing Damper

GB2

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .04 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, or Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Opposed
Frame Shape: Rectangular
Pressure Drop: .04 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): 200 °F

GD1

5.5" Deep Single Thickness Blade Control Damper (Parallel)

GD1

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .03 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, or Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel
Frame Shape: Rectangular
Pressure Drop: .03 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): 200 °F

GD2

5.5" Deep Single Thickness Blade Control Damper (Opposed)

GD2

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .03 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, or Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Opposed
Frame Shape: Rectangular
Pressure Drop: .03 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): 200 °F

GD26

5.5" Deep Airfoil Blade Steel Control Damper (Parallel)

GD26

Maximum Velocity (FPM): 4000 fpm
Max Static Pressure: 8 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Airfoil Blade
Blade Action: Parallel
Frame Shape: Rectangular
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 4000 fpm (FPM)
Temperature Rating (°F): 150 °F

GD27

5.5" Deep Airfoil Blade Steel Control Damper (Opposed)

GD27

Maximum Velocity (FPM): 4000 fpm
Max Static Pressure: 8 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Airfoil Blade
Blade Action: Opposed
Frame Shape: Rectangular
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 4000 fpm (FPM)
Temperature Rating (°F): 150 °F

GI30

4" Deep Light Industrial Airfoil Control Damper

GI30

Maximum Velocity (FPM): 4000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .035 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Airfoil Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: .035 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 4000 fpm (FPM)
Temperature Rating (°F): 250 °F

GI33

8" Deep Light Industrial Single Thickness Control Damper

GI33

Maximum Velocity (FPM): 4000 fpm
Max Static Pressure: 5 .in w.g. @ 1000 fpm
Pressure Drop: .017 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: .017 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 4000 fpm (FPM)
Temperature Rating (°F): 250 °F

GI34

8" Deep Light Duty Industrial Galvanized Damper

GI34

Maximum Velocity (FPM): 4000 fpm
Max Static Pressure: 10 .in w.g. @ 1000 fpm
Pressure Drop: .017 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: .017 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 4000 fpm (FPM)
Temperature Rating (°F): 250 °F

GI41

10" Deep Industrial Single Thickness Blade Control Damper

GI41

Maximum Velocity (FPM): 2500 fpm
Max Static Pressure: 6 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2500 fpm (FPM)
Temperature Rating (°F): 250 °F

GI42

10" Deep Industrial Single Thickness Blade Control Damper

GI42

Maximum Velocity (FPM): 2500 fpm
Max Static Pressure: 8 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2500 fpm (FPM)
Temperature Rating (°F): 250 °F

GI43

10" Deep Formed Steel Industrial Control Damper

GI43

Maximum Velocity (FPM): 2500 fpm
Max Static Pressure: 10 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2500 fpm (FPM)
Temperature Rating (°F): 250 °F

GI50

10" Deep Industrial Formed Steel Airfoil Control Damper

GI50

Maximum Velocity (FPM): 8000 fpm
Max Static Pressure: 12 .in w.g. @ 1000 fpm
Pressure Drop: < .1 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Airfoil Blade
Blade Action: Parallel / Opposed
Frame Shape: Rectangular
Pressure Drop: < .1 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 8000 fpm (FPM)
Temperature Rating (°F): 450 °F

GI51

10" Deep Industrial Formed Steel Airfoil Control Damper

GI51

Maximum Velocity (FPM): 8000 fpm
Max Static Pressure: 20 .in w.g. @ 1000 fpm
Pressure Drop: < .1 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Airfoil Blade
Blade Action: Parallel / Opposed
Pressure Drop: < .1 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 8000 fpm (FPM)
Temperature Rating (°F): 450 °F

GI54

10" Deep Industrial Formed Steel Airfoil "Hi-Temp" Control Damper

GI54

Maximum Velocity (FPM): 8000 fpm
Max Static Pressure: 15 .in w.g. @ 1000 fpm
Pressure Drop: < .1 in. w.g. @ 1000 fpm

Material Options: Hot Rolled Steel
Blade Type: Airfoil Blade
Blade Action: Parallel / Opposed
Pressure Drop: < .1 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 8000 fpm (FPM)
Temperature Rating (°F): 800 °F

GI55

10" Deep Industrial Formed Steel Airfoil Control Damper (Clean Air)

GI55

Maximum Velocity (FPM): 8000 fpm
Max Static Pressure: 10 .in w.g. @ 1000 fpm
Pressure Drop: < .1 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Airfoil Blade
Blade Action: Parallel / Opposed
Pressure Drop: < .1 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 8000 fpm (FPM)
Temperature Rating (°F): 400 °F

GI80

Industrial Single Blade Round Control Damper

GI80

Maximum Velocity (FPM): 10000 fpm
Max Static Pressure: 12 .in w.g. @ 1000 fpm
Pressure Drop: < .1 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Fabricated Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: < .1 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 10000 fpm (FPM)
Temperature Rating (°F): 250 °F

GI81

Industrial Heavy Duty Round Control Damper

GI81

Maximum Velocity (FPM): 10000 fpm
Max Static Pressure: 16 .in w.g. @ 1000 fpm
Pressure Drop: < .1 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Fabricated Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: < .1 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 10000 fpm (FPM)
Temperature Rating (°F): 250 °F

GI850

4" Deep Aluminum Teardrop Blade Backdraft Damper

GI850

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 8 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy, or Galvanized Steel
Blade Type: Tear-Drop
Blade Action: Parallel
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -40 °F to 190 °F

L111

4" Deep Single Blade Volume Control Balancing Damper

L111

Maximum Velocity (FPM): 1500 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .037 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Rectangular
Pressure Drop: .037 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1500 fpm (FPM)
Temperature Rating (°F): 250 °F

L112

Round Single Blade Volume Control Damper

L112

Maximum Velocity (FPM): 1500 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .012 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: .012 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1500 fpm (FPM)
Temperature Rating (°F): 250 °F

L545INS

10" Deep Industrial Insulated Airfoil Control Damper (Clean Air)

L545INS

Maximum Velocity (FPM): 8000 fpm
Max Static Pressure: 10 .in w.g. @ 1000 fpm
Pressure Drop: .1 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Airfoil Blade
Blade Action: Parallel / Opposed
Pressure Drop: .1 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 8000 fpm (FPM)
Temperature Rating (°F): 200 °F

L56

6.5" Deep Aluminum Airfoil Control Damper with Transition

L56

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 6 .in w.g. @ 1000 fpm
Pressure Drop: .04 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Airfoil Blade
Blade Action: Parallel / Opposed
Frame Shape: Round
Pressure Drop: .04 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)

L70

7.5" Deep Round Galvanized Steel Damper

L70

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .012 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: .012 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): -35 °F to 180 °F

L70GL

7.5" Deep Round Galvanized Steel Damper with Honeywell Actuator

L70GL

Maximum Velocity (FPM): 1500 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .012 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: .012 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1500 fpm (FPM)
Temperature Rating (°F): 250 °F

L70R

7.625" Deep Round Single Blade Galvanized Steel Damper with Nine Position Locking Hand Quadrant

L70R

Maximum Velocity (FPM): 1500 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .012 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: .012 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1500 fpm (FPM)
Temperature Rating (°F): 250 °F

L75

7.5" Deep Round Aluminum Damper

L75

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .012 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: .012 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): -35 °F to 180 °F

L80

7.5" Deep Round Stainless Steel Damper

L80

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .012 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, or 316 Stainless Steel
Blade Type: Single Thickness Blade
Blade Action: Single
Frame Shape: Round
Pressure Drop: .012 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)
Temperature Rating (°F): -35 °F to 180 °F

L85

6.5" Deep Aluminum Pin-Lock Control Damper with Transition

L85

Maximum Velocity (FPM): 2000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .012 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Pin-Lock
Blade Action: Parallel / Opposed
Frame Shape: Round
Pressure Drop: .012 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2000 fpm (FPM)

PR55

4" Deep Extruded Aluminum Backdraft Damper

PR55

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .14 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Single Thickness Blade
Blade Action: Parallel
Pressure Drop: .14 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -40 °F to 190 °F

PR66

4' Deep Galvanized Steel Backdraft Damper - Intake or Discharge

PR66

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: 304 Stainless Steel, 316 Stainless Steel, or Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel
Frame Shape: Rectangular
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -30 °F to 180 °F

PRI4

4" Deep Heavy Duty Teardrop Blade Formed Steel Backdraft Damper

PRI4

Maximum Velocity (FPM): 2500 fpm
Max Static Pressure: 10 .in w.g. @ 1000 fpm
Pressure Drop: .67 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Tear-Drop
Blade Action: Parallel
Frame Shape: Rectangular
Pressure Drop: .67 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 2500 fpm (FPM)
Temperature Rating (°F): 180 °F

PRI9

10" Deep Aluminum Teardrop Blade Backdraft Damper

PRI9

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .075 in. w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Tear-Drop
Blade Action: Parallel
Pressure Drop: .075 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -30 °F to 190 °F

PRL

2" Deep Light Duty Aluminum Pressure Relief Damper

PRL

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 1 .in w.g. @ 1000 fpm
Pressure Drop: .075 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Single Thickness Blade
Blade Action: Parallel
Frame Shape: Rectangular
Pressure Drop: .075 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F

T28B

5" Deep Ultra Low Leak Insulated Airfoil Control Damper

T28B

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .04 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Insulated and Thermally Broken Airfoil
Blade Action: Parallel / Opposed
Insulation: Two Part High Density Polyurethane Foam
Pressure Drop: .04 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -40 °F to 200 °F

T28B4

5" Deep Ultra Low Leak Insulated Airfoil Control Damper

T28B4

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Insulated and Thermally Broken Airfoil
Blade Action: Parallel / Opposed
Insulation: Two Part High Density Polyurethane Foam
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -40 °F to 200 °F

T28B4I

5" Deep Ultra Low Leak Insulated Control Damper

T28B4I

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Insulated and Thermally Broken Airfoil
Blade Action: Parallel / Opposed
Insulation: Two Part High Density Polyurethane Foam
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -40 °F to 200 °F

T28BI

5" Deep Ultra Low Leak 6" Airfoil Control Damper

T28BI

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .04 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Type: Insulated and Thermally Broken Airfoil
Blade Action: Parallel / Opposed
Insulation: Two Part High Density Polyurethane Foam
Pressure Drop: .04 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -40 °F to 200 °F

T29B

5" Deep Ultra Low Leak Thermal Break Airfoil Control Damper

T29B

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .04 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Action: Parallel / Opposed
Pressure Drop: .04 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -70 °F to 200 °F

T29B4

5" Deep Ultra Low Leak Thermal Break 4" Airfoil Blade Control Damper

T29B4

Maximum Velocity (FPM): 3000 fpm
Max Static Pressure: 4 .in w.g. @ 1000 fpm
Pressure Drop: .05 in. w.g. @ 1000 fpm

Material Options: Extruded Aluminum 6063 Alloy
Blade Action: Parallel / Opposed
Pressure Drop: .05 in. w.g. @ 1000 fpm
Maximum Velocity (FPM): 3000 fpm (FPM)
Temperature Rating (°F): -70 °F to 200 °F

356

10" Deep Triple Deck Multi-Zone Damper

356

Maximum Velocity (FPM): 1000 fpm
Max Static Pressure: 2 .in w.g. @ 1000 fpm

Material Options: Galvanized Steel
Blade Type: Single Thickness Blade
Blade Action: Parallel
Maximum Velocity (FPM): 1000 fpm (FPM)
Temperature Rating (°F): -40 °F to 180 °F