Airpro Industries India

Motorized fire dampers prevent fire and smoke spread by automatically closing when triggered by heat or smoke detection, using actuators that can be electric or pneumatic, and are designed to isolate fire zones and maintain fire-fighting access routes.

Fire dampers are provided with an hourly fire rating. Smoke damper's primary function is to control the movement of smoke in dynamic air distribution systems, and they reduce the possibility of smoke transfer within ductwork or through wall openings.

Here are some resources for duct damper specifications:
H.V.A.C. WORK
Technical specifications for HVAC work, including duct section length, pressure, and maximum duct size.
Greenheck
HVAC control and balancing damper models, including parallel and opposed blade operation
Beta Industrial
Specifications for dampers, including frame, blades, axles, linkage, bushing, and quadrant
NET
Specifications for volume control dampers (VCDs), including single section and multiple section assembly
DEI Dodge Engineering & Controls Inc.
Specifications for HVAC control dampers, including round, oval, and rectangular sizes, and transition options
Kele
Specifications for HVAC control dampers, including 3V blades made from galvanized or stainless steel
Duct dampers are used to control the flow, volume, and pressure of air in HVAC systems. They can be used to regulate the temperature and climate control in rooms, or to cut off air conditioning to unused rooms.

Damper specifications include the materials used, dimensions, and how the damper operates. Damper specifications also depend on the type of damper, such as a fire damper, smoke damper, or HVAC damper.

HVAC  & AHU Air Control Unit Volume Control Damper (VCD) is a specific type of damper used to control the flow of air in an HVAC heating or cooling system. In order to improve efficiency and occupant comfort, HVAC systems are commonly divided up into multiple zones.

fire dampers prevent fire and smoke spread by automatically closing when triggered by heat or smoke detection, using actuators that can be electric or pneumatic, and are designed to isolate fire zones and maintain fire-fighting access routes.

Fire Damper with Fusible link

A motorized fire damper is a device installed in HVAC ductwork to prevent the spread of fire and smoke when air ducts penetrate fire barriers. It automatically closes when triggered by heat, isolating fire-rated spaces. Motorized dampers can be integrated with Building Management Systems (BMS) for control and monitoring.
Key Features and Functions:
Fire Protection:
Motorized fire dampers are designed to restrict the spread of fire and smoke when ducts penetrate fire-rated walls, partitions, and floors.
Automatic Closure:
They close automatically upon detection of heat, usually through a thermal responsive device (TRD) or fusible link.
Integration with BMS:
Many motorized fire dampers can be integrated with Building Management Systems (BMS) for control, monitoring, and integration with fire alarm systems.
Actuator:
A motorized fire damper typically has an actuator that controls the opening and closing of the damper blades.
Spring Return:
Some actuators are spring-return, meaning they automatically close the damper when power is lost or a fire is detected.
Limit Switches:
Actuators often include limit switches to indicate the damper's open and closed positions.
Manual Override:
Some actuators allow for manual operation in certain situations.
Functionality:
1. Normal Operation:
In normal HVAC operation, the damper blades are open, allowing air to flow through the duct.
2. Fire Detection:
When a fire is detected by a TRD or fusible link, the actuator is activated.
3. Damper Closure:
The actuator closes the damper blades, isolating the fire-rated area and preventing the spread of fire and smoke.
4. BMS Integration:
If integrated with a BMS, the damper's status can be monitored and controlled from a central location.
Benefits:
Fire Containment: Prevents the spread of fire and smoke through ductwork.
Fire-Rated Integrity: Maintains the integrity of fire-rated walls, partitions, and floors.
Safety: Protects occupants and property in the event of a fire.
Compliance: Meets building codes and fire safety regulations.
Technical data sheet BFN24-ST - Belimo
Safety Position Lock The Safety Position Lock reliably holds the fire damper in the safety position in case of fire therefore ensuring maximum safety. The tec...
Belimo
Motorized Fire Smoke Damper - Beteccad
Motorized Fire Damper UL 555. Fire Dampers are required by the International Uniform Building Code to maintain the required fire resistance rating of walls, par.
Motorized Fire Dampers are used to prevent transmission of flame where air ducts penetrate fire barriers. ... Motorized Fire damper with actuator ensures lowest...
Fire dampers -
In case of a fire, fire dampers shut automatically to prevent the propagation of fire and smoke through ductwork to adjacent designated fire compartments.
Dampers – UL Marking and Application Guide
A. ... Fire dampers are designed to close automatically when heat is detected, and are used to restrict the spread of fire where ducts and air transfer openings...
UL Solutions
Fire Dampers and Smoke Dampers - AMCA.org
A fire damper closes once the duct temperature reaches a high enough level to melt a fusible link. A smoke damper closes upon the detection of smoke. The codes ...
Fire dampers -
Functional description The spring return actuator enables the motorised opening and closing of the damper blade; it can be activated by the central BMS. In the ...
TROX
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Motorized Fire damper with actuator ensures lowest resistance to airflow in HVAC systems with airflow velocity to 2000 fpm (10.2 m/sec), 4"w.g (1000Pa) installed vertically (or) horizontally and is rated for airflow and leakage in either direction.

A motorized damper is a device used in HVAC systems that uses a motor to control the opening and closing of blades, allowing for precise airflow regulation and control.

To find information about motorized round dampers, you can search for specific manufacturers' product manuals or technical documents, such as those from ALDES, Resideo, or Greenheck, which often provide installation, operation, and maintenance instructions.
Here's a breakdown of where to look and what to expect:
Where to Find Information:
Manufacturer Websites:
Check the websites of companies that produce motorized round dampers (e.g., ALDES, Resideo, Greenheck, Systemair, Belimo).
Technical Documents:
Look for product specifications, installation manuals, wiring diagrams, and maintenance guides.
Online Search:
Use keywords like "motorized round damper installation," "motorized round damper wiring," or "motorized round damper maintenance".
What to Expect in the Documents:
Installation Instructions:
How to mount the damper in a round duct, connect it to the ductwork, and secure it.
Wiring Diagrams:
How to connect the damper motor to the control system (e.g., 24 VAC, 120 VAC).
Operation and Maintenance:
How to adjust the damper's airflow, troubleshoot problems, and perform routine maintenance.
Product Specifications:
Dimensions, airflow capacity, motor specifications, and other technical details.
Safety Precautions:
Important safety information related to electrical work and damper operation.

fire dampers prevent fire and smoke spread by automatically closing when triggered by heat or smoke detection, using actuators that can be electric or pneumatic, and are designed to isolate fire zones and maintain fire-fighting access routes.

An Aluminium Aerofoil motorized damper is an automatic, air duct device with extruded aluminum, aerofoil-shaped blades that control airflow by adjusting their angle. Inspired by aircraft wings, the aerodynamic design minimizes air turbulence and enhances energy efficiency. A motorized actuator, connected via gears outside the airstream, precisely adjusts the blades to regulate air volume in HVAC systems based on signals from a thermostat. 
Key Components and Features
Frame:
A rigid frame made of extruded aluminum, often with a specified depth and flange for duct connection.
Aerofoil Blades:
Extruded aluminum blades with a wing-like shape that are arranged in an opposed manner for smooth airflow control and reduced turbulence.
Gear System:
Polycarbonate or nylon gears connect the blades, providing synchronized movement and operation outside the air path.
Motorized Actuator:
An external electric motor that receives signals from a thermostat to precisely position the damper blades for automatic control.
Seals (Optional):
Low-leakage gaskets can be added between blades and frames to minimize air leakage and improve system efficiency.
How it Works
1. Airflow Control:
The damper's aerofoil blades pivot to change the opening in the duct.
2. Turbulence Reduction:
The blade shape is designed to be aerodynamic, reducing air resistance and minimizing turbulence, which helps save energy.
3. Automatic Operation:
A thermostat detects temperature changes and sends a signal to the motorized actuator.
4. Blade Adjustment:
The actuator then moves the damper blades to the required position, increasing or decreasing airflow as needed.
Applications
HVAC Systems:
Used in heating, ventilation, and air conditioning (HVAC) systems for precise air volume control.
Building Climate Control:
Regulates airflow to various rooms or zones to maintain desired temperatures.
Energy Efficiency:
Helps save energy by ensuring air is directed efficiently to where it is needed.

An aluminum aerofoil duct damper is a device made of aluminum with wing-shaped (aerofoil) blades that regulates air volume in an HVAC system by pivoting to open or close a duct. The aerofoil shape minimizes turbulence, improving airflow and energy efficiency. These dampers are used for air balancing, climate control, and can operate manually with a handle or automatically with a motorized actuator connected to a thermostat.
Key Components & Features
Aluminum Aerofoil Blades: The core of the damper, these extruded aluminum blades have a wing-like shape inspired by aircraft wings to provide smooth airflow and reduce air resistance and turbulence.
Frame: A sturdy frame, often made of extruded aluminum, provides structural support for the blades and is designed for easy connection to ductwork.
Gear System: Polycarbonate or nylon gears connect the aerofoil blades, ensuring synchronized movement and operation of the damper.
Control Mechanism: Dampers can be controlled manually via a handle or automatically using a motorized actuator, which receives signals from a thermostat to adjust blade position.
Seals (Optional): Some dampers include low-leakage gaskets between the blades and frame to reduce air leakage and improve overall system efficiency.
How it Works
Airflow Control: When the damper needs to adjust airflow, the aerofoil blades pivot to change the size of the opening within the duct.
Turbulence Reduction: The aerodynamic shape of the blades reduces turbulence as air passes through, which can lead to energy savings in an HVAC system.
Automatic Operation: In an automatic system, a thermostat detects temperature changes and sends a signal to the motorized actuator, which precisely positions the damper blades to maintain the desired temperature.
Applications
Air Volume Regulation: Used to balance air distribution in different branches of an HVAC system by controlling the amount of air flowing to specific areas.
Energy Efficiency: The design helps to minimize energy waste by controlling air leakage and reducing fan energy consumption.
Climate Control: Regulates air distribution to various zones in a building, contributing to effective temperature control.