General Product Overview - Control and Backdraft Dampers

Models 1010 & 1020 Vee Blade • Low Leakage Control Damper
• Model Series 1010/1020 are Nailor’s the most widely used low leakage dampers and are the standard choice for use in the majority of low to medium velocity and pressure commercial HVAC systems. They are low cost, high quality dampers that meet or exceed the majority of standard specification requirements. They meet the frequently specified leakage criteria of less than 10 cfm per sq. ft at 4" w.g. (0.5% at 2000 fpm). The design features include a sturdy hat channel frame with die-formed corner gussets for reinforcement and structural strength equivalent to 13 gauge channel type frames, a triple-vee blade design that maximizes strength and zero maintenance concealed linkage (out of the airstream) for reduced pressure drop and air turbulence.

304 Stainless Steel Vee Blade • Low Leakage Control Damper
• Models 1010/1020 with optional 304 Stainless Steel construction provide an enduring solution for corrosive environment commercial and industrial HVAC and process applications. The proven triple-vee blade design and sturdy hat channel mitered frame with die-formed corner gussets afford solid performance that will withstand many normally harsh atmospheric and process elements. The design also features stainless steel zero-maintenance concealed blade linkage for reduced pressure drop and turbulence, and stainless steel axles, bushings and hardware for long lasting operation suitable for use in applications with temperatures ranging from -50°F (-45°C) to 250°F (121°C) depending on blade configuration and leakage (seals) requirements.

Vee Blade • Unsealed Control Damper
• Model Series 1012 & 1022 are Nailor’s most widely use dun sealed dampers and are the standard choice for use in the majority of low to medium pressure and velocity commercial HVAC systems. They are low cost, high quality dampers that meet or exceed the majority of standard specification requirements. The design features include a sturdy hat channel frame with die-formed corner gussets for reinforcement and structural strength equivalent to 13 gauge channel type frames, a triple-vee blade design that maximizes strength and zero maintenance concealed linkage (out of the air stream) for reduced pressure drop and air turbulence.

Model 1090 Round Duct • Low Leakage Control Damper
The Nailor Model 1090 is a low leakage, butterfly damper which has been designed for all types of round ductwork applications and is suitable for use in the majority of low to medium pressure and velocity commercial HVAC systems.The design features a sturdy beaded casing for superior rigidity, and a laminated blade double bolted to axle and drive shaft for maximum strength. The 1090 installs easily in round spiral ductwork. The damper may be used for two position or modulating control using a variety of electric or pneumatic actuators or may also be used as a manual balancing damper when used with the optional hand locking quadrant and positive shut-off is required.

Steel Airfoil Blade • Low Leakage • High Performance Control Damper
• Model Series 1110/1120 are Nailor’s most cost effective steel airfoil blade control dampers. They are suitable for use in the majority of low to medium pressure and velocity commercial HVAC systems.
The design features include a sturdy hat channel frame with die-formed corner gussets for reinforcement and structural strength equivalent to 13 gauge channel type frames and zero maintenance concealed linkage (out of the air stream) for reduced pressure drop and air turbulence. Ultra-low leakage meeting the International Energy Conservation Code criteria for building envelope dampers of maximum 3 cfm/ft2 (15.2l/s/m2).

Extruded Aluminum Airfoil Blade • Ultra-Low Leakage • High Performance Control Damper
• Models 2010 & 2020 - Premium choice for use in high velocity, medium pressure commercial and industrial HVAC systems. They offer unsurpassed leakage and pressure drop characteristics for superior performance. Model 2020 opposed blade, is an AMCA licensed damper and provides the ultimate in ultra-low leakage performance characteristics. Standard features include a rugged galvanized steel hat channel frame with die-formed corner gussets for strength, no-maintenance concealed linkage, and heavy duty extruded aluminum airfoil blades that combine superior rigidity and deflection resistance with low pressure drop. Unique design compression type seals are keyed and locked into blade extrusion.

Extruded Aluminum Airfoil Blade & Frame • Ultra-Low Leakage • High Performance Control Damper
• Models 2010EAF & 2020EAF Extruded aluminum airfoil blade and frame premium damper, ideal for use in high velocity, medium pressure, commercial and industrial HVAC systems. They offer unsurpassed leakage and pressure drop characteristics for superior performance. Model 2020EAF opposed blade, is an AMCA licensed damper and provides the ultimate in ultra-low leakage performance characteristics. Features include a heavy duty extruded aluminum hat channel frame, no-maintenance concealed linkage, and rugged extruded aluminum airfoil blades that combine superior rigidity and deflection resistance with low pressure drop. Unique design compression type seals are keyed and locked into blade extrusion.

Insulated Extruded Aluminum Airfoil Blade & Frame • Ultra-Low Leakage • High Performance Control Damper
• Models 2010IB/IBF & 2020IB/IBF Premium insulated dampers featuring rugged extruded aluminum airfoil blades, suitable for use in high velocity,medium pressure commercial and industrial systems. These ultra-low leakage dampers with insulated blade and frame, help limit thermal conductivity as well as air infiltration, making them ideal for use in more extreme applications. Features include a choice of heavy-duty frames, no-maintenance concealed linkage and unique design compression type seals that are keyed and locked into the blade extrusion.

Manual Balancing Dampers • Steel
• Models 1810 & 1820 Specially designed for manual balancing applications. They are suitable for use in the majority of commercial low to medium pressure and velocity HVAC systems. They are designed and built to provide a cost effective and reliable damper for reduced volume control and not positive shut-off. They are not recommended for applications as an automatic control damper. The 1810/1820 Series includes many of the design features incorporated in the Nailor 1000 Series Control Dampers. These include a sturdy hat channel frame with die-formed corner gussets for reinforcement, a vee-blade design that maximizes strength and zero maintenance concealed linkage (out of the air stream) for reduced air turbulence.

Single Blade • Manual Balancing Damper • Steel
• Model 1870 Manual Balancing Damper is an economical branch duct balancing damper designed for use in most metal and fibre duct board HVAC systems. The low profile frame and sills provide maximum free area. The ribbed forms in the blade and frame are for extra strength. A locking manual hand quadrant is provided with each damper.

For Round Duct • Manual Balancing Damper • Steel
• Model 1890 is a manual balancing butterfly damper designed for all types of round ductwork application sand is suitable for use in most low pressure and velocity commercial HVAC systems. They are not intended for use asa positive shut-off or automatic control damper. The design features a sturdy beaded casing ideal for round spiral ductwork connections, and a corrosion resistant steel blade that can be locked in any position with the hand quadrant that is supplied as standard with the damper.

Backdraft Damper • Extruded Aluminum • Standard Performance • Medium Duty
• Model 1370 is a standard performance gravity operated backdraft damper for use in light to medium duty commercial HVAC applications. Backdraft dampers are used in systems to pass airflow in one direction and to prevent airflow in the opposite direction. Corrosion-resistant extruded aluminum construction highlights the model’s features which include reinforced mitered corner frame that resists racking, and aerodynamic blades that overlap the jambs for maximum weather protection. Extruded PVC blade seals provide quiet closure as well as extra weather protection. Blade linkage is concealed in jamb for low pressure drop and provides smooth operation at system velocities of up to 1500 fpm.

Backdraft Damper • Extruded Aluminum • High Performance • Heavy Duty
• Model 1380 is a high performance gravity operated backdraft damper for use in medium to heavy duty commercial and light industrial HVAC applications. Backdraft dampers are used in systems to pass airflow in one direction and to prevent airflow in the opposite direction. Corrosion resistant extruded aluminum construction highlights the model’s features which include reinforced mitered corner frame that resists racking, and aerodynamic blades that overlap the jambs for maximum weather protection. Extruded PVC blade seals provide quiet closure as well as extra weather protection. Blade linkage is mounted out of view on the rear of the blades and provides smooth operation at system velocities of up to 2500 fpm.

Counterbalanced Backdraft Damper • Extruded Aluminum • Standard Performance • Medium Duty
• Model 1370CB is a standard performance counter balanced backdraft damper designed to automatically prevent the backflow of air while allowing for automatic air intake or exhaust/pressure relief in medium duty HVAC applications. Corrosion-resistant extruded aluminum construction highlights the model’s features which include a reinforced mitered corner frame that resists racking, and aerodynamic blades that overlap the jambs for maximum weather protection. Extruded PVC blade seals provide quiet closure as well as extra weather protection. Blade linkage is concealed in jamb for low pressure drop and provides smooth operation at system velocities of up to 1500 fpm. Blade mounted counter weights are easily adjusted to desired opening pressure.

Counterbalanced Backdraft Damper • High Performance • Heavy Duty
• Model 1380CB is a high performance counterbalanced backdraft damper designed to automatically prevent the backflow of air while allowing for automatic air intake or exhaust/pressure relief in medium to heavy duty commercial and light duty industrial HVAC applications. Corrosion-resistant extruded aluminum construction highlights the model’s features which include a reinforced mitered corner frame that resists racking, and aerodynamic blades that overlap the jambs for maximum weather protection. Extruded PVC blade seals provide quiet closure as well as extra weather protection. Blade linkage is mounted out of view on the rear of the blades and provides smooth operation at system velocities of up to 2500 fpm. Blade mounted counterweights are easily adjusted to desired opening pressure.

Counterbalanced Backdraft Damper • High Performance • Heavy Duty Steel Frame
• Model 1390CB is a counterbalanced backdraft damper designed for pressure relief to automatically assist in maintaining and limiting desired pressures in medium to heavy duty commercial and light duty industrial HVAC or process air systems. The unique extruded aluminum blade design and fully adjustable counterbalance assembly offer pressure relief at extremely low pressure differentials. The rugged steel mitered corner frame is reinforced to resist racking, and ball bearings provide extreme sensitivity and ultra-smooth operation. Neoprene blade seals provide quiet closure as well as extra weather protection.