- Double-Skin, Aerodynamically Optimized Blades
Reduced Airflow Resistance:
Aerodynamically shaped blades are designed to allow air to flow smoothly over and around them,
minimizing turbulence and drag. Less turbulence means the system requires less energy to move air
through the damper, reducing fan power consumption.
Lower Pressure Drop:
Double-skin blades (blades with two layers and possibly insulation between them) provide a
smoother, more uniform surface for airflow. This further reduces pressure drop across the damper,
which directly translates to lower energy requirements for maintaining desired airflow rates.
Enhanced Sealing:
The double-skin construction can also help in achieving a tighter seal when the damper is closed,
minimizing unwanted air leakage that would otherwise waste conditioned air and energy.
- High-Temperature Silicon Blade Seals
Superior Sealing Performance:
Silicon blade seals are highly flexible and resilient, maintaining a tight seal even under high
temperatures and pressure. This prevents air leakage, ensuring that all the air is directed as intended
(no bypass or loss), which is crucial for energy efficiency in controlled environments.
Consistent Performance:
Silicon maintains its properties over a wide temperature range, ensuring that the seal remains
effective even during temperature fluctuations, so efficiency is not compromised over time.
How These Features Enhance Durability
- Double-Skin Blades
Structural Strength:
The double-skin design increases the mechanical strength of each blade, making it more resistant to
bending, warping, or deformation under high pressure or temperature. Thermal Insulation:
The air gap or insulation between the two skins can help protect the internal structure from extreme
temperatures, reducing thermal stress and prolonging the lifespan of the damper.
- High-Temperature Silicon Blade Seals
Heat Resistance:
Silicon seals can withstand high temperatures without degrading, cracking, or losing elasticity. This is
essential in environments where dampers are exposed to hot gases or emergency heat conditions
(such as in fire scenarios).
Chemical and Aging Resistance:
Silicon is also resistant to many chemicals and does not age as quickly as other materials, ensuring
the seal remains effective and the damper maintains its gas-tight integrity for a longer period.
SOURCES:
- Double-Skin, Aerodynamically Optimized Blades
Reduced Airflow Resistance & Lower Pressure Drop
ASHRAE Handbook—HVAC Systems and Equipment (2020), Chapter 16: Airflow Control and
Distribution Devices
ASHRAE notes that aerodynamic blade profiles in dampers and louvers reduce turbulence, minimize
pressure drop, and improve energy efficiency in HVAC systems.
Aerodynamic Performance of Air Dampers” – J. S. Kim et al., Energy and Buildings, Vol. 42, Issue 5,
2010
This study demonstrates that dampers with optimized blade shapes have significantly lower pressure
drops, leading to energy savings.
ScienceDirect Abstract
Enhanced Sealing
Development of High-Performance Air Tight Dampers” – S. Lee et al., Journal of Mechanical
Science and Technology, 2013
The paper discusses how double-skin blade designs improve sealing and reduce leakage, which is
essential for energy efficiency in controlled environments. Springer Link
- High-Temperature Silicon Blade Seals
Superior Sealing Performance & Consistent Performance
“Sealing Performance of Silicone Rubber at High Temperatures” – S. Du et al., Journal of Applied
Polymer Science, 2016
This research confirms that silicone rubber maintains flexibility and sealing properties over a wide
temperature range, ensuring consistent performance.
Wiley Online Library
KTA 3601: Ventilation Systems in Nuclear Power Plants (German Nuclear Safety Standards
Commission)
KTA 3601 specifies the use of high-performance, heat-resistant sealing materials (such as silicone)
for dampers in nuclear ventilation systems to ensure gas-tightness under extreme conditions.
- Double-Skin Blades: Structural Strength & Thermal Insulation
“Double-Skin Facade as a Tool for Improving the Energy Efficiency of Buildings” – Energy Procedia,
Vol. 78, 2015
While focused on building facades, this paper explains how double-skin structures provide thermal
insulation and structural strength, principles directly applicable to damper blade design.
ScienceDirect Full Text
- High-Temperature Silicon Blade Seals: Heat, Chemical, and Aging Resistance
Thermal and Chemical Stability of Silicone Rubber” – Polymer Degradation and Stability, Vol. 96,
Issue 9, 2011
Silicone rubber’s resistance to heat, chemicals, and aging is well documented, making it ideal for
demanding sealing applications in industrial and nuclear settings.
ScienceDirect Abstract
Aging Behaviour of Silicone Rubber Seals in Nuclear Power Plants” – Nuclear Engineering and
Design, Vol. 240, Issue 8, 2010
This study specifically addresses the long-term durability of silicone seals in nuclear environments,
confirming their suitability and longevity. 5. Industry Standards and Guidelines
EN 1751: Ventilation for Buildings—Air Terminal Devices—Aerodynamic Testing of Dampers and
Valves
This European standard outline testing methods for pressure drop and leakage, reinforcing the
importance of advanced blade and seal designs for energy efficiency and airtightness.