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Tire manufacturer Trelleborg was recently awarded the highest possible accreditation from SAE after the organization conducted an in-depth study of the organization. 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 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. “It’s our hope that the refrigerant’s reduced global warming potential combined with H7T3R’s best in class permeation level can improve emissions.”

Read the whole story at industrial-embedded.com.

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