The KFSD-L-111: A Certified Combination Fire & Smoke Damper
Engineered for safety and compliance, the Model KFSD-L-111 is a UL 555 and UL 555S Classified combination fire and smoke damper. Designed for dynamic smoke management systems, this damper is rated for use in partitions with a fire resistance of up to 4 hours. Its ultra-low leakage rating ensures superior air containment and reliable performance when it matters most.
Key Product Highlights
- Dual Classification: The KFSD-L-111 is both a fire and smoke damper, certified to meet UL 555 and UL 555S standards.
- Safety Compliance: This damper meets NFPA 90A, 92A, and 92B criteria for primary fire and smoke dampers in walls and floors, providing peace of mind for your project.
- Reliable Operation: Designed for dynamic closure in vertical installations, the damper handles a maximum static pressure of 4” W.G and velocity up to 4000 FPM.
- Robust Construction: A durable 16-gauge galvanized steel frame and corrosion-resistant components ensure long-lasting performance. The silicone seals and stainless steel jamb seals provide an airtight seal up to 450°F.
- Flexible Actuation: The damper features a reliable RS-100 electronic fusible link with a 165°F closure temperature. It is compatible with a range of electric spring return actuators (230V, 120V, or 24V) and pneumatic options.
Specifications at a Glance
- Materials: 16-gauge galvanized steel, sintered bronze bearings, and silicone seals.
- Actuators: Electric (230V, 120V, 24V) or pneumatic.
- Dimensions (Single Section):
- Minimum: 8″ x 8″
- Maximum: 36″ x 36″

Construction & Renovation
We deliver residential, commercial, and industrial projects that are built to last.
Moreover, our team ensures quality, precision, and on-time delivery.
Learn more about Construction & Renovation.
Architectural & Interior Design
We design creative spaces that reflect both modern and traditional styles.
In fact, every project is tailored to client needs for comfort and elegance.
👉 Explore our Design Services
Woodwork Factory
We produce custom furniture, doors, and interior wood solutions.
In addition, our craftsmanship blends durability with refined aesthetics.
👉 View our Woodwork Solutions.
Best Ductwork Factory (HVAC)
We manufacture square, round, and oval ducts, plenum boxes, and ventilation systems.
Furthermore, all products follow ASHRAE, SMACNA, and AMCA standards.👉 Discover our HVAC Solutions.
Stainless Steel Equipment
Gypsum Board & Painting
We create false ceilings, wall partitions, and painting finishes for homes and businesses.
As a result, we transform interiors into modern, functional, and elegant spaces.
👉 See Gypsum Board & Painting Services.
Engineering, Consultancy, Contracting & Development
Structural Engineering, followed by
Electrical Engineering, then
Plumbing Engineering,
Mechanical Engineering, and
Architectural Engineering, as well as
Civil Engineering, including
Geotechnical Engineering, and of course
Interior Architecture, not forgetting
Fire Protection Engineering, and finally
Acoustical Engineering.