The iso fluẍ® product in the Lydall fluẍ thermal and acoustical shields product family is a thermal encapsulation that serves to protect sensitive components from heat radiated by the exhaust line and maintains thermal calories in the exhaust line to facilitate catalyzation and filtration processes. A low thermal conductivity fiber is placed in direct contact with the exhaust line component and is covered with thin metal layer.
Metallic Layers
(i) Stainless Steel
- Austenitic and Ferritic grades based on temperature, environmental and economic constraints.
- Flat or embossed
- Shield Tmax < 1000 °C
(s) Aluminized Steel
- Various aluminized coating weights as a function of environmental/corrosion resistance requirements
- Flat or embossed
- Shield Tmax < 500 °C
(a) Aluminum
- Flat or embossed
- Shield Tmax < 300 °C
Thermal Performance
- Low emissivity surfaces for high IR environments
- Low thermal conductivity media in contact with the exhaust component
- Combined functions: thermal shielding and isolation
- Homogenous temperature distribution in exhaust component
Acoustical Performance
- Decoupling of exhaust component with the engine compartment
- Marked noise absorption
- Higher transmission loss for better acoustic isolation
- Option to pierce/perforate the metallic layer to increase the effective noise absorption area
Mechanical Performance
- Hemmed edges for handling safety and increased product robustness
- Roll and plate embossment provides an increase in part rigidity and improves formability
- Wide array of approved and commonly used alloys available to exceed the requirements of harsh thermal and mechanical environments
Assembly
- In-house: hemming, spot welding or mechanical fasteners
- Delivered ready to assemble – through similar or customer specific methods