DC24V Smoke Prevention Supply Vent
The DC24V Smoke Prevention Supply Vent is designed to provide fresh air while helping control smoke movement in buildings during both normal operation and emergency conditions. Operating on a stable 24-volt DC power supply, it is suitable for integration with modern building management systems, fire alarm panels, and emergency control circuits.This supply vent typically consists of a compact fan unit, a durable casing, and a carefully engineered air outlet. The fan is optimized for continuous or intermittent operation, depending on system design. In normal conditions, it introduces outdoor air into interior spaces to improve ventilation quality and maintain comfortable indoor conditions. During fire or smoke events, it contributes to smoke prevention strategies by creating positive pressure in specific areas, helping to keep escape routes clearer.Using a 24V DC power source offers several advantages, especially for life-safety applications. Low-voltage operation enhances electrical safety and facilitates connection to backup power supplies such as batteries or centralized DC systems. This ensures that the smoke prevention function can be maintained even in the event of mains power failure, supporting evacuation and rescue operations.The unit is usually compatible with automatic control via sensors and detectors. When connected to a fire alarm or smoke detection system, it can be set to start, stop, or switch modes according to preprogrammed logic. For example, stairwells, refuge areas, or specific corridors can be supplied with fresh air to maintain positive pressure, thereby limiting smoke infiltration. This assists in keeping visibility higher and breathing conditions safer along evacuation routes.Construction materials are generally chosen for fire resistance, corrosion protection, and long service life. The casing may be made from galvanized steel or coated metals, and internal components are selected to withstand the elevated temperatures that may occur during an emergency, within specified limits. Noise and vibration reduction measures can be incorporated to ensure that the unit is suitable for continuous use in occupied spaces.Installation options are flexible, allowing mounting in ceilings, walls, or technical shafts depending on architectural needs. Duct connections can be integrated to distribute air to multiple zones. Maintenance access is usually provided through removable panels or easily accessible components, enabling inspection, cleaning, and replacement of parts with minimal downtime.In summary, the DC24V Smoke Prevention Supply Vent combines everyday ventilation with critical life-safety functionality. By integrating low-voltage operation, compatibility with control systems, and a design intended to support smoke control strategies, it plays an important role in protecting occupants and improving building safety performance.
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Normally Closed Pressurization Air Supply Vent for Fire Smoke Prevention Systems
Category:
Dampers
Browse number:
11
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Release time:
2026-02-10 11:08:44
The Pressurization Air Supply Vent is a fire protection component dedicated to building mechanical pressurization smoke prevention systems, designed to supply fresh air into critical evacuation zones — including fire stairwells, lobby ante-rooms, combined ante-rooms, and refuge floors — to maintain a positive air pressure differential that physically blocks smoke from entering these spaces during a fire event. Normally closed in daily operation to minimize air leakage and reduce HVAC energy loss, the Pressurization Air Supply Vent opens automatically upon receiving a DC24V fire alarm linkage signal or can be manually activated on-site, simultaneously triggering the pressurization fan to deliver a continuous fresh air supply into the protected zone. The maintained pressure differential — 40 to 50 Pa in stairwells and 25 to 30 Pa in ante-rooms per national standard — creates an air barrier that prevents smoke from migrating from fire zones into evacuation pathways, protecting building occupants during evacuation and maintaining clear access for firefighting operations. A built-in 280°C fusible alloy element provides automatic closure if supply duct temperatures reach the fire threshold, preventing flames from spreading through the supply ductwork. Available in normally closed and self-gravity louver configurations to suit ante-room and stairwell applications respectively, the DC24V Smoke Prevention Supply Vent is manufactured from cold-rolled steel and stainless steel in compliance with national fire protection standards and is widely specified for high-rise residential towers, commercial buildings, hospitals, underground facilities, and public assembly buildings across Southeast Asia and global markets.
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