1. Overview of Smoke Exhaust Damper
1.1
Smoke exhaust dampers are mainly installed on branch ducts and air outlets of mechanical smoke‑exhaust systems. It keeps closed under normal conditions. Upon fire alarm, it opens automatically by receiving DC24V electric signal from fire‑control system, and can also be manually opened on‑site to realize smoke extraction in target zone. Manual reset is required after fire emergency. Available in rectangular and round sizes, often matched with smoke exhaust air outlets.
‑ Standard Smoke Exhaust Damper: Electric opening by DC24V signal, manual reset, for smoke‑exhaust branch ducts. ‑ Signal‑feedback Smoke Exhaust Damper: Outputs open‑position feedback signal after electric actuation to fire control panel. ‑ Remote‑control Smoke Exhaust Damper: Equipped with remote actuator for remote manual opening and resetting, suitable for concealed ceiling spaces and duct shafts with difficult direct access.
1.2 Product Classification
‑ By structural shape: Rectangular type, Round type. ‑ By functional configuration: ‑ Standard Type: DC24V motor‑driven opening, manual reset. ‑ Signal‑feedback Type: Electric opening with position feedback signal output. ‑ Remote‑actuator Type: Supports remote manual opening and reset.
2. Operating Conditions for Smoke Exhaust Damper
Operating temperature: ‑20 ℃ ~ +80 ℃; short‑term exposure to high‑temperature flue gas during smoke exhaust. Relative humidity: less than 90%. Medium condition: Fire‑smoke flue gas.
Power supply: DC24V for electrically‑actuated models.
3. Smoke Exhaust Damper Configuration
3.1 Standard Components
‑ Damper body ‑ Blade assembly ‑ Actuator ‑ Connecting flange
3.2 Optional Accessories (please specify requirements upon order)
‑ Position feedback device ‑ Remote‑control actuator ‑ Sealing gasket
4. Manufacturing Process of Smoke Exhaust Damper
4.1
Damper body and blades are manufactured from galvanized steel sheet. Blades are reinforced with stiffeners for higher rigidity. Rotating shafts adopt wear‑resistant bushings to guarantee smooth opening and closing. Actuator components are inspected according to fire‑protection standards to ensure reliable signal‑triggered action.
4.2
Damper flange is integrally bent to form flat mating surface for easy connection with ducts and smoke‑exhaust outlets.
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