Heavy-Duty/Industrial Dampers HB, HBTR, HPR, HCD, HCDR, HSD, and HTD Series

Greenheck dampers bring the same quality engineering and manufacturing that has earned Greenheck its position as an industry leader. Aggressive research and development keeps Greenheck a major player in the damper industry. Greenheck has the most UL classified dampers and largest selection of AMCA licensed dampers and louvers in the industry. In-House Testing State-of-the-art laboratory and testing facilities have always been important to Greenheck's continuing business success. A laboratory facility devoted exclusively to development and testing of damper and louver related products for testing...

Damper Applications Greenheck offers an extensive line of heavy-duty and industrial grade dampers designed to provide a solution for the following applications: Control and Isolation The rectangular HCD and round HCDR products are designed for control and shut-off applications. With ten HCD models and ve HCDR models to choose from, these product families offer a wide variety of congurations, options, accessories, and actuators. Isolation dampers are designed for applications where leakage is critical. The low leakage model HCDR-351 and bubble-tight HBTR series provide the highest levels of shut...

Control Dampers - HCD Series The rectangular HCD models feature a heavy duty frame fabricated from formed sheet metal C-channels. Standard frame depths are 8 or 10 inches (203 or 254 mm). Each frame is available in a variety of materials, including galvanized steel, carbon steel, galvanneal steel, 304 stainless steel, 316 stainless steel, and aluminum. Material thickness can range from 14 ga. (1.9mm) to 3/8 inch (9.5mm), depending on air velocity, static pressure, damper size, and other variables unique to the application. The mounting anges can be ordered with bolt holes, customized to match...

Control Dampers - HCD Series The following table allows for a quick selection of a HCD based on maximum pressure and velocity. Greenheck offers HCD's capable of operation above 45 in. wg (11.2 kPa) and 6000 ft/min. (30.5 m/s). Consult your Greenheck damper expert for help with selecting a damper in this performance range. Galvanized Steel Galvanized Steel Aluminum Galvanized Insulated Blade Prole Blade Seals Stainless Steel Sleeve Bronze Sleeve (Outboard) Relubricable Ball (External) Relubricable Ball (Outboard) Bronze Sleeve (External) - EPDM Fiberglass Tadpole None Jamb Seals The following...

Control Dampers - HCD Series There is a variety of materials available for the frame including galvanized steel, carbon steel, galvanneal steel, 304 stainless steel, 316 stainless steel, and aluminum. Material thickness can range from velocity, static pressure, damper size, and any other variables unique to the application. Greenheck carries an extensive range of high quality coatings to meet the demands of all commercial and industrial applications. The following table summarizes the material and paint coatings available on the HCD series. Blower Outlet Application The Industrial control damper...

Round Control Dampers - HCDR Series Round Control To complement Greenheck's rectangular heavy- duty control dampers, the HCDR models offer an extensive range of round dampers for industrial use. Solid flanges are welded around the circular frame, providing a rigid base to support the butterfly style blade. For larger diameters, blades are reinforced with structural supports to ensure years of operation at elevated pressures and velocities. The four standard models are For multi-blade round dampers, consult the factory. A variety of options are available. * Special design required for temperatures...

HBTR Series HCDR-351 is an isolation damper that provides tight shutoff with very low leakage in HVAC or process control systems. Optional features make the HCDR-351 capable to tailor to your application. designed for isolation applications. Bubble-tight means the damper has the lowest possible leakage rating: zero. The silicone blade seal and double gland axle seals provide bubble-tight performance. Every bubble-tight damper is leakage tested in accordance with AMCA 500-D figure 5.8 before it leaves the factory to ensure bubble-tight performance. The HBTR-151 provides bubble-tight performance...

Backdraft Dampers - HB series Heavy duty/Industrial backdraft dampers are designed to prevent backow at static pressures up to 20 in. wg (5 kPa) and velocities up to 6400 ft/min. (32.5 m/s). All of Greenheck’s heavy duty backdraft dampers (HB series) use an edge-pivoting blade. Standard construction is the fabricated 2V blade, which is strengthened by two longitudinal “V”s, designed for a tight seal when closed and low pressure drop when open. To complete Greenheck’s model line, a fabricated or extruded aluminum airfoil blade is available for better performance at higher velocities and pressures....

Backdraft Dampers - HB Series The following table provides a quick selection guide based on velocity and pressure. * Note: The start-open is the pressure at which damper blades just begin to rotate, blades point. Damper size and bearing selection may cause start-open pressure to vary from this are not full open at this

Pressure Relief Dampers - HPR Series A pressure relief damper is a backdraft damper with an adjustable start-open pressure. This damper is capable of maintaining a relatively constant pressure at various airows and which closes upon a decrease in differential pressure. Pressure relief dampers do not immediately HPR-230 open fully upon reaching their start-open pressure. They maintain tight leakage to approximately 60% of the start-open pressure and have a relatively at ow control somewhat above the start-open pressure. Counterbalance weights are mounted externally for easy adjustment and balancing...

Tunnel Ventilation Dampers - HTD Series Road and underground metro tunnels are some of the most difficult environments in the world. High humidity, dust-laden air, and limited access can make the installation and operation of ventilation systems problematic. However, these issues become insignificant in the event of an emergency. The dampers and fans that make up the ventilation system must operate when lives are on the line. Greenheck’s tunnel specific dampers, the HTD series, were designed to meet these challenges. Construction Greenheck’s HTD series dampers begin with the same ange mount,...