Venting of Housings

Airflow is the measure for the gas permeability of a membrane. The airflow value indicates the level of protection a housing provides against pressure loads.

The air that is present in a housing causes overpressure or vacuum in case of temperature changes. As a result of inadequate compensation, the pressure loads lead to housing deformations up to and including damage to seals and weld seams, resulting in ingress of water and other harmful fluids that damage the sensitive electronics or may lead to functional failure of the application.

Pressure Compensation Seals have different water entry points, depending on the type and manufacturing method of the PCS. The water entry points indicate at what point water might start to penetrate the membrane and damage the sensitive electronics. Using compressed air, a corresponding water column is simulated on the PCS to determine the water entry point.

Oleophobicity describes the wettability of a material with non-polar liquids and is represented in degrees.

For oleophobicity testing, defined drops are applied to the membrane surface. Subsequently, behavior is evaluated and categorized.

Climatic and humidity/moisture resistance are essential to versatile utilization of pressure compensation seals in industrial settings. A PCS must resist harshest requirements due to temperature shocks and retain its full functionality.

The extent of necessary media resistance has consistently been growing in recent years and PCS are exposed to battery acid, transmission fluids, degreasers, or anti-freeze, for example.

Our self-adhesive PCS are also used on a wide variety of surfaces where permanent adhesion to the substrate must be ensured.  

All of Schreiner Group’s pressure compensation seals for venting are free of harmful substances and contain no perfluorooctanoic acid (PFOA) and PFOA-related compounds. This ensures that no persistent organic pollutants harm humans and the environment as well as compliance with EU POP Regulation 2019/1021.

With our products, we comply with the requirements of the REACH (Registration, Evaluation and Authorization of Chemicals) and RoHS (Restriction of Certain Hazardous Substances) regulations as amended.

Modern and automated production operations entail corresponding requirements for the delivery quality of products.

Customers can choose between a wide variety of standardized forms of delivery, and specialized forms of delivery such as ESD bags against electrostatic charging or protected packaging for overseas shipments are part of our delivery portfolio as well.

Our transparent end-to-end tracing system meets the highest automotive demands. Every roll is quality-inspected and provided with a closure seal.

Customized forms of delivery/packaging are always available and can be provided with different winding reel sizes for automated processing systems.