DuraVent ventilation grilles with a specified airflow rate for systems subject to thermal stress
DuraVent is designed for applications where airflow, cooling performance, and component weight are critical design factors. The hole geometry is designed to reduce pressure losses, increase airflow, and simultaneously minimize material usage in a targeted manner.
Compared to standard perforated sheets, airflow is increased by up to 7%, while maintaining a weight-optimized structure. Functional performance results from the coordinated interaction of the hole pattern, material properties, and coating.
How to Prevent Corrosion at Hole Edges and Forming Zones
Corrosion in perforated sheets tends to occur primarily at the edges of the holes and in formed areas. DuraVent addresses these weak points through a tailored coating strategy.
The combination of cathodic dip coating and powder coating ensures a consistent coating thickness, even at the edges. While conventional perforated sheets experience reduced coating thickness at the edges of the holes due to the so-called edge-thinning effect, DuraVent achieves complete and uniform coating coverage.
- Salt spray test resistance >1,000 h according to DIN ISO 9227
- Complete edge coverage
- No reduction in protective effectiveness due to forming
How perforated metal structures remain stable despite their perforations
Mechanical stability is ensured through a coordinated tool and process design.
Perforation, material selection, and forming parameters are coordinated in such a way that sufficient component stiffness is maintained even with complex geometries.
- Stable structure for perforated surfaces
- Suitable for deep-drawn components
- Reproducible component properties in series production
DuraVent Process System – Customized Manufacturing for Ventilation Grilles with Defined Properties
DuraVent is not a single manufacturing step, but a coordinated process system:
- Tool design based on material and hole pattern
- Perforation with reduced burr formation
- Cathodic dip coating for the base coat
- Powder coating for coating thickness stabilization
- Forming with consideration of the hole structure
This process chain ensures that functional properties such as air flow and corrosion protection are maintained even after forming.
What are the benefits of partnering with Graepel for ventilation grilles and radiator grilles?
Graepel develops and manufactures DuraVent as its own product, leveraging its in-house process expertise:
- Design of hole patterns and component geometry
- Coordination of coating and forming process
- Validation through component testing and series production
- Reproducible quality throughout the entire supply chain
DuraVent is a standard developed by Graepel for heavy-duty ventilation grilles with defined technical properties.
