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Low air resistance, high structural rigidity, great design

The challenge was to develop an optimal ventilation grille that met the customers' requirements. Graepel developed a top-of-the-line ventilation grille that has been proven to offer high airflow while maintaining a low weight and high rigidity. Graepel Persity is the product that meets all these requirements—and does so with a great design.

Graepel Persity – for high airflow

Graepel Persity offers customers fivefold added value through the highest level of technical precision and an optimized punching process.

The advantages of Graepel Persity:

  • Improved airflow performance
  • Weight reduction
  • Cost reduction
  • Greater rigidity
  • Visually appealing design

The Graepel Persity geometry allows for lower pressure loss compared to comparable unformed perforated sheets.

Graepel Persity – Certified Quality

Results from pressure loss measurements conducted in March 2019 by TU Dresden.

See opposite: Air resistance (pressure loss) at 10 m/s; it has been proven that the deformation causes no pressure loss

Graepel Persity – Weight and cost savings with increased stiffness

Cost and weight savings

  • Greater component stiffness allows for reduced material thickness
  • Lower raw material usage reduces costs and weight
  • The geometry of Graepel Persity significantly increases component stiffness while using the same amount of material.
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