Issue: Dec 2009


Trelleborg Sealing Solutions Material Is Best According to SAE Study



Sealing Compound Outperforms Competitive Materials in Study to Identify the Best Materials for Use in New Environmentally Friendly Automotive Air-Conditioning Refrigerant

by Steve Barclay

Trelleborg Sealing Solutions, a worldwide leading supplier of high-quality sealing and bearing systems, announces its H7T3R Hydrogenated Nitrile Butadiene Rubber (HNBR) O-Ring material topped all others in the Cooperative Research Program CRP1234-2, a recent study conducted by the Society of Automotive Engineers (SAE).

One aspect of the study focused on O-Ring materials, hoses and other air conditioning system components for permeation performance and fluid compatibility in HFO1234yf, a new refrigerant that has significantly lower global warming potential than the existing R134a standard refrigerant. The Trelleborg H7T3R material (widely known as
2920) gave permeability levels 50 percent less than any of the other HNBR materials tested as well as excellent results in fluid immersion and oil compatibility tests.

"As the automotive industry moves to reduce the environmental impact of refrigerant gases used in air conditioning systems, there is a high level of interest in HFO1234yf," says Colin Macqueen, Director of Technology for Trelleborg Sealing Solutions Americas. "Our H7T3R material has been used for many years (under its previous reference

2920) to seal R134a and this latest study confirms its suitability for use in HFO1234yf systems. We expect the excellent sealing performance of H7T3R to be maintained for current users when changing refrigerants. The new refrigerant\'s reduced global warming potential combined with H7T3R\'s best in class permeation level will produce a significant improvement in emissions related to automotive air conditioning system seals."

Trelleborg Sealing Solutions strives to provide leading solutions for today\'s environmental and regulatory challenges, meeting alternate refrigerant requirements for both current and future advancements. Trelleborg is working closely with a growing number of OEMs and Tier1 customers to optimize solutions for their specific applications. Trelleborg Sealing Solutions also has Ethylene Propylene Diene Monomer
(EPDM) materials to offer for use in HFO1234yf and development continues to further enhance their properties.

About Trelleborg Sealing Solutions and Trelleborg Group

Trelleborg Sealing Solutions is one of the world\'s leading developers, manufacturers and suppliers of precision seals. It support its aerospace, industrial and automotive customers through over 20 production facilities and more than 40 marketing companies globally. Within its portfolio are some of the longest established sealing brands, including Busak+Shamban, Chase Walton, Dowty, Forsheda, GNL, Palmer Chenard, Shamban, Skega and Stefa along with a large number of proprietary products and materials such as Turcon(R), Zurcon(R), Orkot(R), Isolast(R), Stepseal(R) and Wills Rings(R). www.tss.trelleborg.com

Trelleborg is a global industrial group whose leading positions are based on advanced polymer technology and in-depth applications know-how. Trelleborg develops high-performance solutions that seal, damp and protect in demanding industrial environments. The Trelleborg Group had annual sales 2008 of approximately SEK 31 billion, with approximately 20,000 employees in 44 countries. The Group comprises four business areas: Trelleborg Engineered Systems, Trelleborg Automotive, Trelleborg Sealing Solutions and Trelleborg Wheel Systems. The Trelleborg share has been listed on the Stockholm Stock Exchange since 1964 and is listed on the OMX Nordic List. www.trelleborg.com


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