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Rectangular Smoke Dampers-Class I leakage rated smoke damper with vertical airfoil blades
The Class I Leakage Rated Smoke Damper with Vertical Airfoil Blades is designed for critical HVAC and smoke control systems that demand maximum air-tightness and operational reliability.
It prevents the spread of smoke through ductwork during fire or emergency ventilation conditions, ensuring safe evacuation routes and effective building pressurization control.
Technical Specifications
| Frame Material | Galvanized steel |
|---|---|
| Frame Material Thickness | 16 ga. (1.5 mm) |
| Frame Type | 5 in. x 1in. (127mm x 25mm) hat channel |
| Blade Action | Opposed |
| Blade Material | Galvanized steel |
| Blade Material Thickness | 14 ga. (2 mm) equivalent |
| Blade Type | Double skin airfoil |
| Blade Orientation | Vertical |
| Linkage | Plated steel out of airstream, concealed in jamb |
| Axle Bearings | 316SS |
| Axle Material | Plated steel |
| Blade Seals | Silicone |
| Jamb Seals | Stainless Steel |
| Mounting | Vertical |
Space Envelopes
Externally mounted actuators always require space outside of the damper sleeve. Worst case space envelopes shown below. Exact dimensions may vary based on specifice damper configuration. Consult factory for specific space envelope if necessary.
Transitioned Damper Dimensions
When a smoke damper is being used in conjunction with round or oval ductwork, the SMD-301V can be supplied in a factory sleeve
with round or oval transitions on both ends of the sleeve. Dampers should be ordered to the duct dimensions. Drawings below show
overall damper size.
Multiple Section Dampers
Dampers larger than maximum single section size are supplied as a factory assembly of two or more sections of equal size. The
following figures show maximum damper section size and assembly configurations for multi-section dampers.
