Positive Pressure Air Supply Port

The Positive Pressure Air Supply Port, also referred to as a motorized fire damper or smoke control damper, serves a critical function in building fire protection systems. Its primary purpose is to maintain tenable conditions in evacuation routes during fire emergencies, preventing smoke and toxic gases from compromising stairwells and corridors where building occupants must pass to reach safety.

Understanding fire dynamics is essential to appreciating the product's value. In building fires, smoke and toxic combustion products typically present a greater threat to life than the fire itself. Smoke spreads rapidly through building voids and open spaces, and it can quickly obscure exit routes, reduce visibility to near zero, and render occupants incapacitated through smoke inhalation. The Positive Pressure Air Supply Port addresses this threat by creating a pressure differential between protected spaces and fire-affected areas. When the system operates, fresh air is introduced into stairwells and antechambers, raising the pressure inside these spaces above the pressure in adjacent fire zones. This pressure barrier prevents smoke from flowing through door gaps, elevator shafts, or other openings into evacuation routes.

The unit's operation is activated by the building's fire alarm system. Upon receiving a fire signal, the integrated DC24V electric actuator opens the damper blades within seconds, allowing supply air to enter the protected space. This rapid response is essential to establishing positive pressure conditions before smoke migration begins. The actuator's fail-safe design ensures the damper closes automatically if power is interrupted during a fire event, maintaining system integrity.

DAVCO engineers this product with careful attention to both functional and regulatory requirements. Compliance with international fire protection standards, including EN 12101, BS 5588, and NFPA 92, ensures the unit meets or exceeds the performance requirements specified by fire protection engineers and authorities having jurisdiction. The unit's fire resistance rating provides assurance of continued operation under fire conditions for the required time period.

Instant Emergency Response
 – The positive pressure air supply port opens within seconds upon receiving a fire signal from the building's fire alarm system. This rapid actuation is critical to establishing pressurization before smoke migration begins, maximizing the available safe evacuation time for building occupants.

Reliable DC24V Actuation
 – The electric actuator operates on low-voltage DC24V power, ensuring compatibility with standard fire alarm control panels. The actuator's design incorporates spring-return functionality that closes the damper automatically in case of power failure, maintaining system integrity and containing smoke spread.

Positive Pressure Protection
 – By delivering fresh air into stairwells and antechambers, the unit creates a pressure differential that effectively prevents smoke infiltration. This positive pressure environment ensures that evacuation routes remain clear of smoke, providing safe passage for building occupants and improved access for emergency responders.

Superior Fire Resistance
 – Constructed from heavy-gauge galvanized steel with heat-resistant components, the unit maintains structural integrity and continued operation during fire conditions. The material selection ensures reliable performance even at elevated temperatures.

Comprehensive System Integration
 – The unit interfaces seamlessly with building fire alarm systems, HVAC controls, and building management systems. Electrical connections and control interfaces are designed for straightforward integration with standard fire protection system components.

Flexible Installation Options
 – Available in configurations for wall or duct installation, the positive pressure air supply port adapts to diverse building conditions and architectural constraints. Multiple duct connection options simplify integration with existing or new air supply systems.

Durable Galvanized Construction – The galvanized steel construction provides outstanding corrosion resistance and structural durability. The protective coating ensures long service life even in demanding environments with high humidity or temperature variations.

Customization Capabilities – DAVCO offers extensive customization including duct connection configurations, actuator mounting orientations, special coatings for demanding environments, and size variations to meet specific project requirements.

Commercial Office Buildings
 – High-rise office buildings require stairwell pressurization to ensure occupant safety during fire emergencies. The positive pressure air supply port is installed at multiple levels throughout stairwells and on each floor in smoke-proof antechambers, ensuring adequate pressure throughout the evacuation route.

Hospitality Facilities
 – Hotels and resorts accommodate large numbers of guests, many of whom may be unfamiliar with the building layout. Effective pressurization systems are essential to ensure safe evacuation. The positive pressure air supply port is specified in hotels worldwide as part of comprehensive fire protection strategies.

Shopping Centers and Complexes
 – Large retail facilities present unique challenges due to high occupancy, complex geometries, and limited access points. Pressurization systems using the positive pressure air supply port ensure that evacuation routes remain usable throughout fire events.

Public Buildings
 – Hospitals, schools, museums, airports, railway stations, and sports stadiums require robust smoke control systems to protect the public. The positive pressure air supply port is a key component in these applications.

Underground Facilities
 – Parking garages, subway stations, and underground pedestrian passages present specific smoke control challenges due to limited access and egress points. Positive pressure systems are essential to prevent smoke accumulation in these critical areas.

Residential High-Rise Buildings
 – Multi-story residential buildings require pressurization systems to ensure resident safety. The positive pressure air supply port is installed in stairwells and common corridors.

Pressurization Function
 – The primary function of the positive pressure air supply port is to introduce supply air into protected spaces, establishing a positive pressure environment that prevents smoke migration from fire-affected zones.

Emergency Actuation
 – The electric actuator responds to fire alarm signals, opening the damper blades to allow airflow. The fast response time is critical to effective pressurization.

System Coordination
 – The unit coordinates with fire alarm panels, smoke detectors, and building management systems to ensure integrated, reliable operation.

Airflow Regulation
 – The unit provides controlled airflow into the protected space, with volume determined by system design requirements.

Q: What is the normal state of the product?

A: It remains normally closed and opens during fire conditions.

Q: Can it be connected to fire alarm systems?

A: Yes, it supports DC24V electric actuator fire linkage control.

Q: Can it be operated manually?

A: Yes, manual emergency operation is supported.

Q: Where is it installed?

A: Stairwells, antechambers, and windowless rooms.

Q: Can it be customized?

A: Yes, dimensions and specifications can be customized.

Q: Do you provide technical support?

A: Yes, we provide selection, installation guidance, and after-sales support.