Because water matters. Sealing manufacturer Freudenberg Sealing Technologies has developed a Compound 70 EPDM 335DW for O-rings. The material meets the requirements for drinking water applications and is intended to contribute to the protection of health and the environment.
O-rings made from this material have the relevant market approvals and are therefore suitable for worldwide use in the drinking water sector. Water is a precious resource, and global climate change has increased the need for clean drinking water.
According to a UNESCO report from 2024, 2.2 billion people worldwide live without access to clean drinking water and 3.5 billion people without sanitation facilities.
Temperature-Resistant Sealing Solution
This is where the material 70 EPDM 335DW is designed to help. It is specifically developed for drinking water applications and helps protect public health and the environment.
The new 70 EPDM 335DW O-ring compound offers advantages. It is heat-resistant and withstands hot water, steam, and hot air up to +150°C, and in cold conditions, it remains effective down to -50°C (static).
An external O-ring testing laboratory has tested copper compatibility and found no copper-induced autoxidation. The manufacturer guarantees a long service life and reliable sealing function.
Comprehensive Tests and Certifications
"The compound demonstrates excellent aging resistance and is suitable for drinking and process water, hot water, hot steam, and silicone oils," says Klaus Schmieder, Segment Manager at Freudenberg Sealing Technologies. "These properties make O-rings made from 70 EPDM 335DW the ideal choice for drinking water applications where durability and safety are paramount."
They meet the standards KTW-BWGL, DIN EN 681-1, ÖNORM B5014, EN 16421, CE1935/2004, WRAS BS6920, AS/NZS 4020, FDA §177.2600, KIWA BRL-K17504, and NSF/ANSI 61.
Applications requiring ACS certification (Attestation de Conformité Sanitaire) are currently covered by a CLP certificate (Classification, Labelling and Packaging). This certificate applies to O-rings with a diameter smaller than 63 mm.
A complete ACS certification for larger O-rings is currently under review.
EU-Compliant Material Requirements Met
Looking to the future, Compound 70 EPDM 335DW not only meets the current evaluation criteria for plastics and other organic materials in contact with drinking water (KTW-BWGL).
For the first time, uniform requirements for materials in contact with drinking water are being established, and the approval from the various independent testing institutes within the EU is recognized.
The Compound 70 EPDM 335DW has also been tested regarding the current European positive list.
Its composition meets these new requirements of European legislation (Directive (EU) 2020/2184) and is recognized by independent testing institutes in the EU.
High-Quality Material Composition
"These certifications are essential to ensure the safety and reliability of our products," explains Schmieder. "The rigorous testing and compliance with international standards demonstrate our commitment to high-quality materials that protect public health and meet the requirements of modern drinking water systems."
With this sealing solution, Freudenberg Sealing Technologies aims to contribute to conserving water resources and protecting the environment.
"The development of the O-ring compound 70 EPDM 335DW is a significant achievement by our team," summarizes Schmieder. "We have thoroughly tested this material to ensure it meets the highest standards for drinking water applications. Our goal is to provide reliable and safe solutions that contribute to people's well-being."WiederholenClaude kann Fehler machen. Bitte überprüfen Sie die Antworten.
