Dampers, Air Measuring Products, & Access Doors
Commercial Control Dampers
Models are available in 3V, extruded airfoil, fabricated airfoil, and round blade designs. Galvanized, aluminum, or 304 stainless steel. Variety of electric two position, modulating, and pneumatic actuators. We offer Severe Environment Dampers in many models.
Model VCD: 3-V Blade Type
Typically used in low to medium pressure and velocity systems. Fabricated blades are reinforced with 3 longitudinal structurally designed vee’s. Available with blade and jamb seals for low leakage applications.
Model VCD: Airfoil Blade Type
Typically used in medium to high pressure and velocity systems. Airfoil blade with structural reinforcement through the entire length. All of these models include blade and jamb seals for low leakage and ultra-low leakage applications.
Model VCDR/VCDRM: Round Blade Type
Typically used in low to medium pressure and velocity systems. Available with blade and jamb seals for low leakage applications. The VCDRM incorporates an insert type multi-blade and the VCDR damper uses a single blade.
Air Measuring Products
By measuring the amount of outside air coming into a building, you can be assured a building is in compliance with all applicable indoor air quality codes including ASHRAE Standard 62 and California Title 24. Meeting these minimum requirements reduces indoor airborne viruses and bacteria which can lead to Sick Building Syndrome. Studies have shown that under ventilated buildings create an environment where people are less productive.
The IAQ-42 is an air measuring control damper that utilizes patented Speciflow™ technology. The IAQ-42 will control air to:
- Prevent over ventilation
- Prevent under ventilation
- Provide energy savings during low occupancy periods
The IAQ-42 can help buildings meet the indoor/outdoor air requirements of ASHRAE Standard 62 or California Title 24 by providing accurate monitoring and control of outside air.
The AMS is an accurate airflow measuring station and is furnished with a properly sized pressure transducer that outputs a signal proportional to cfm. A field supplied controller can use the transducer’s signal along with the flow formula (provided) to regulate a modulating actuator to the target set point.
The AMS is also available with a factory supplied LON controller that accepts a target flow set point as an input (either analog or digital) and outputs a 0-10 VDC signal that can be used to position a damper (sold separately) and a 0-10 VDC signal proportional to the airflow.
The AMD dampers were developed as a low cost alternative to the IAQ-42 damper. Field supplied controllers are very easy to program following labeling on the damper. Factory supplied controllers are also available
A lower price solution was accomplished by:
- Providing lower cost, less complicated controllers
- Developing three different available blade styles (3V, Fabricated Airfoil, Aluminum Airfoil)
- Factory calibration is not required
The AMD series comes standard with a modulating actuator and a properly sized pressure transducer that outputs a signal proportional to CFM. A field supplied controller can use the transducer’s signal along with the flow formula (provided) to regulate a modulating actuator to the target set point.
Thermally Broken, Insulated Blade, Low Leakage
Typically used to achieve additional protection where thermal conductivity is a concern. This model is available with a thermally broken frame for extreme cold applications.
Dodge’s ICD series of dampers was developed for applications where it is necessary to minimize the transfer of heat or cold penetration and reduce condensation.
- ICD-44 features an aluminum hat channel frame. ICD-45 has an aluminum hat channel frame that is thermally broken with two polyurethane resin gaps and insulated on four sides with polystyrene.
- ICD series damper blades feature thermally broken airfoil shaped blade with polyurethane foam.
- Silicone blade and jamb seals stay flexible in cold temperatures.
- Dual bearing with acetal inner sleeve and flanged outer bearing features no metal-to-metal or metal-to-plastic contact.
Curtain Fire Dampers
UL 555 rated models with either galvanized or 304 stainless steel construction. Fire resistance ratings of either 1 1/2 or 3 hours. We offer Severe Environment Dampers and Marine Dampers in many models.
Model FD: Static Rated Model
FDR: Round Static Rated
UL 555 rated models for use in HVAC systems that are automatically shut down in the event of a fire emergency. Available in three frame widths: standard, narrowline, and ultra thin, with optional sleeves and transitions.
Model Model DFD: Dynamic Rated Model Model
DFDR: Round Dynamic Rated
UL 555 rated models tested to close under airflow, and rated for use in HVAC systems that are operational in the event of a fire emergency. Fire dampers can be mounted either vertically or horizontally with airflow in either direction.
Combination Fire Smoke Dampers
Available in 3V blades for use in systems up to 2000 fpm and 4 in. wg or airfoil blades for use in systems up to 3000 fpm and 4 in. wg. All models have been tested and are labeled in accordance with UL 555 and UL 555S. Fire resistance ratings of either 1 1/2 or 3 hours and leakage class ratings of I, II, or III. We offer Severe Environment Dampers and Marine Dampers in many models.
Model FSD/FSDR: Traditional Fire Smoke
Classified to UL 555 and UL 555S and must be mounted within the plane of the wall or floor. Rated for airflow and leakage in either direction. Galvanized and 304 stainless steel construction available. Electric and pneumatic actuators
Model CFSD: Corridor Fire Smoke
Models each with three mounting configurations available. 1 hour Corridor Fire Resistance Rating and UL 555S Leakage Rating. Can be installed horizontally behind grilles and diffusers in corridor penetrations with ratings for airflow and leakage in either direction. Galvanized and 304 stainless steel construction available. Electric and pneumatic actuators.
Model OFSD: Out Of Wall Fire Smoke
Classified to UL 555 and UL 555S and can be installed outside of the plane of the wall or floor. This allows the actuator to be mounted internally with convenient access to the damper, actuator, and heat responsive device through the grille. The entire installation can be done from the grille side of the opening. Rated for airflow and leakage in either direction. Electric and pneumatic actuators.
Available in 3V blades for use in systems up to 2000 fpm and 4 in. wg or airfoil blades for use in systems up to 3000 fpm and 6 in. wg. All models have been tested and are labeled in accordance with UL 555S. The models are available in leakage class I, II, or III. We offer Severe Environment Dampers in many models.
Galvanized and 304 stainless steel construction available. Electric and pneumatic actuators.
Ceiling Radiation Dampers
Models are available in round or rectangular shapes with butterfly type blades or a curtain blade.
All models have been tested and are labeled in accordance with UL 555C, for protection of ceiling openings in fire rated floor/ceiling assemblies with fire resistance ratings of 3 hours or less. In addition, Greenheck CRDs are Warnock Hersey listed for application in gypboard ceilings or ceiling grid systems with fire resistance ratings of up to 3 hours.
Access doors are designed for use in low to medium pressure duct systems. They provide a durable, practical, and inexpensive means of gaining access to damper components inside the ductwork.
Model HAD: Hinged Style
Model CAD: Cam Style
Model RAD: Round Style
Designed to allow airflow in one direction and prevent reverse airflow. Models are available with many different mounting orientations, airflow directions,operation types, and performance ratings.
Exhaust backdraft damper models are designed to allow exhaust airflow but prevent airflow in the reverse direction. Typically used with a fan or power roof exhauster. Vertical or horizontal mount.
Intake backdraft damper models are designed to allow supply airflow into a building but prevent airflow in the
reverse direction. Typically used with a fan or gravity intake ventilator. Vertical or horizontal mount.
Manual Balancing Dampers
Both round and rectangular single blade construction, as well as multi-blade construction models are available. Designed to regulate the flow of air in an HVAC system. They are not intended to be used in applications as a positive shut off or for automatic control.
Models come standard with a locking manual quadrant. An optional standoff bracket is available for installations using insulated duct.
Industrial Control Dampers
Heavy duty flanged style frame dampers with various blade styles and pressure classes. Designed to control airflow and provide shut off in HVAC or industrial process control systems. We offer Severe Environment Dampers in many models.
Model HCD: Rectangular
Rectangular dampers are available with pressure and velocity capabilities up to 45 in. wg and 6000 fpm, respectively.
Model HCDR: Round
True round industrial dampers are available for pressure and velocity capabilities up to 20 in. wg and 6500 fpm, respectively.
Model IVDE: Inlet Vane
Typically mounted to the inlet flange of an industrial fan to more efficiently control the amount of airflow entering the fan. Available with manual, electric, or pneumatic actuators. Maximum operating temperature is 200°F.