At Modular Framing Systems, Inc., performance and precision are more than promises – they’re engineered into every product. Enter the LLSD (Low Leakage) Damper: a sleek, high-performance solution for airflow management in modern HVAC systems.
Built for Performance – Designed with Purpose
The LLSD Damper is a next-level version of our Standard Damper designed to handle projects calling for AMCA Class 1A leakage performance. Its opposed blade design ensures consistent airflow control, while its low leakage rating supports efficiency and elevated compliance requirements.
Here’s what sets the LLSD apart:
- Material Excellence: The blades are extruded Aluminum 6063 T5. Each is fitted with thermoplastic rubber gasket and flocked end blade caps for optimal sealing. The U-shaped aluminum frame adds to the structural integrity without adding unnecessary weight.
- Enhanced Durability: Blade blocks and internally housed gears made from reinforced PA6 + 20% fiberglass ensure a long-lasting build ready to withstand rigorous use without rusting or the potential for debris accumulation.
- Easy Control: The LLSD offers flexible control options. Use the optional die-cast aluminum handle for manual operation or request a mounting plate for actuator installation. For taller dampers, additional drive shafts can be linked for synchronized performance.
Certified Efficiency
Performance matters – and the LLSD delivers. This damper has been tested and classified as a Class 3 damper per UNI EN 1751:2003 standards, easily meeting Class 1A ratings per AMCA 500. It is TÜV SÜD certified, offering verified low leakage and consistent control across various blade angles (30°, 45°, and 90° open).
Ready for Real-World Demands
With a working temperature range from -15 °C to 80 °C and a maximum single blade width of 55 inches without intermediate support, the LLSD Damper is engineered for real-world adaptability and resilience. Whether you’re working in extreme cold or moderate heat, it’s ready to perform.
Why Choose LLSD from Modular Framing Systems?
Simple. It’s a damper that doesn’t compromise. It balances innovation with reliability – ideal for engineers, contractors, and facility managers looking to upgrade airflow control with confidence.
