Honeywell MS8109F1210 Fire Damper Actuator 9Nm, 24V | DLK
Posted on: 12/03/2026
Explore the technical specs of the Honeywell MS8109F1210 fire/smoke damper actuator (9Nm, 24V, 2 SPST switches). Designed for UL555S standard fire control systems. Purchase authentic devices at DLK - the official Honeywell distributor.
Optimizing BMS with Honeywell MS8109F1210 Fire Damper Actuator (UL555S Standard)
Overview: Honeywell MS8109F1210 – The Premier Solution for Smoke Control Systems
In modern Heating, Ventilation, Air Conditioning (HVAC) and Building Management Systems (BMS), emergency airflow control via dampers is a critical life-safety factor. The Honeywell MS8109F1210 is a fast-acting, two-position, Direct Coupled Actuator (DCA) featuring a spring return mechanism, specifically engineered for demanding fire and smoke control applications.
The product boasts a robust die-cast aluminum housing designed for optimal protection, allowing for convenient flush mounting directly to the damper box. As the official distributor of Honeywell, DLK delivers precise building safety solutions through our internationally certified line of genuine Honeywell 9Nm fire damper actuator products.

Smart Operating Mechanism Defining Safety Performance
The Honeywell MS8109F1210 actuator operates via an on/off signal from a Single-Pole, Single-Throw (SPST) controller.
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Driving Cycle (Open): When supplied with 24 Vac/dc power, the actuator generates high torque to drive the damper to its fully open position (mechanically limited to 95 degrees ±3 degrees) with a typical timing of just 15 seconds.
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Spring Return Cycle (Emergency Close): In the event of a power failure or when the controller breaks the circuit, the integral spring mechanism instantly releases, returning the damper safely to the 0-degree position in an identical 15-second timeframe.
Technical Highlight: A patent-pending design completely eliminates the need for limit switches to reduce overall power consumption. Upon detecting a mechanical stall limit, the actuator automatically drops to a holding power level, operating completely independent of the hub position.
4 Practical Applications of Honeywell MS8109F1210 in Commercial and Industrial Sectors
The structural versatility of the Honeywell MS4104, MS4109, MS4604, MS4609, MS8104, MS8109 damper actuator series allows for seamless integration into rigorous environments. The Honeywell MS8109F1210 model is especially critical in the following scenarios:
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Commercial Building HVAC Systems: Installed in central ductwork. When the BMS detects fire, the device rapidly closes the dampers to prevent the toxic spread of smoke and flames between floors.
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Healthcare and Medical Facilities: In sterile environments such as operating rooms and isolation wards, the actuator guarantees the containment of contaminated air or automatically opens for high-volume smoke exhaust during fire emergencies.
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Industrial Manufacturing Plants: Applied in flammable material storage zones. Upon detecting high temperatures or smoke, the actuator isolates the airflow, assisting in rapidly localizing the fire hazard.
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Underground Transportation Infrastructure: Installed in subway stations and tunnels to maintain localized ventilation while executing high-speed smoke exhaust functions during fire incidents, ensuring safe evacuation routes for passengers.
Why Do HVAC Engineers Choose This Specific Model?
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Strict Fire Code Compliance: The device is meticulously designed to pass the rigorous testing requirements of the UL555S standard, maintaining reliable operation at extreme temperatures up to 350°F (176°C).
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Superior Mechanical Durability: The Honeywell MS8109F1210 achieves an impressive design life of 30,000 full-stroke cycles, significantly slashing maintenance frequency and operational costs for facility owners.
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Smooth and Energy-Efficient Operation: During its holding state, the device consumes a mere 23 VA of power and generates absolutely zero audible noise (maximum noise rating of 20 dBA measured at 1 meter).
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Precise Position Feedback Integration: Models with the "1210" suffix come equipped with two internal SPST auxiliary switches fixed at 7° and 85° nominal strokes, empowering the central BMS to monitor real-time damper open/close status with total accuracy.
Core Technical Datasheet
For quick reference and project cross-checking by contractors and engineers, below are the core operational specifications:
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Technical Specifications |
Details |
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Device Model |
Honeywell MS8109F1210 |
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Voltage Input |
24 Vac/dc (+20%, -10%, 50/60 Hz) |
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Controller Type |
Two-position, SPST (Series 80) |
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Minimum Driving Torque |
80 lb-in (9 Nm) at 350°F (176°C) |
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Operational Timing |
15 seconds typical (Drive Open) / 15 seconds typical (Spring Close) |
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Mechanical Stroke |
95 degrees ±3 degrees |
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Internal Auxiliary Switches |
2 SPST (7° and 85° nominal stroke) |
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Environmental Ratings |
NEMA 1, IP40 |
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Ambient Temperature Range |
0°F to 130°F (-18°C to 55°C) |
Expert Guide to Selecting the Optimal Product Model
When designing a BMS ventilation system, mechanical engineers must carefully evaluate two primary factors: Power Supply and Status Monitoring Requirements.
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If the control system utilizes low voltage (24V) and demands robust torque to drive large dampers (9Nm), the Honeywell MS8109F1210 is the flawless choice, owing to its two built-in SPST auxiliary switches for central position feedback.
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If the specific zone does not require damper position monitoring, engineers can optimize material costs by selecting the Honeywell MS8109F1010 model (which features no internal switches).
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For projects operating on standard line voltage (120V or 230V), contractors can flexibly substitute with equivalent power models such as the Honeywell MS4109F1210 (120 Vac) or the Honeywell MS4609F1210 (230 Vac).
DLK – The Official Distributor of Honeywell Equipment in Vietnam
EMPHASIS: DLK is the official authorized distributor for the Honeywell brand in the Vietnamese market. When procuring products from DLK TRADING SERVICE COMPANY LIMITED, project investors, OEMs, and HVAC contractors are guaranteed absolute peace of mind because:
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100% of our equipment is imported natively, accompanied by comprehensive Certificates of Origin and Quality (CO/CQ).
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Our elite team of technicians possesses deep knowledge of technical datasheets, standing ready to assist with quantity take-offs and automated measurement solutions.
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We provide official factory warranties and aggressively meet strict delivery schedules for large-scale mega-projects.
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