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Freudenberg Micro Seal for R744 charging valves |
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The sealing specialist showcases its micro seals for charging and servicing R744 Mobile Air Conditioning systems. The innovative sealing lip is a key part of next-generation charging ports.
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2007-10-25
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Freudenberg's permanent bonded micro sealing lip improves the handling and performance of charging ports for CO2 air conditioning systems substantially. The rubber-bonded seal was developed jointly by Freudenberg and Ventrex. Being permanently bonded to the valve body, Freudenberg’s micro sealing lip shows how elastomer sealings can be attached to a valve's metal parts, suggesting the use in similarly innovative applications in the future.
The valve seal has proven its high resistance to explosive decompression in alternating temperature tests, showing only little swelling even at highest temperatures. Being optimized by the means of Finite Element Analysis (FEA), Freudenberg's product only presents small changes of its mechanical characteristics under the influence of aggressive oils and odoration substances at elevated temperatures.
Main features
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Freudenberg's micro seal features:- Optimized composition: materials 85 HNBR 230861 and 85 EPDM 232444 passed all tests regarding explosive decompression
- Low CO2 leakage rate: less than 1g/year without the need for a cap
- High temperature range: -40°C to 140 °C
- Oil compatibility: proven with PAG, PAO and PEO oils
- Application: one solution for high- and low pressure side of the system
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Reaction
„Freudenberg welcomes the breakthrough of CO2 air conditioning systems in the German automotive market as a further step towards environmental protection. We are sure that our products will continue leading the way for further vehicle emissions reductions through innovation,” says Wolfgang Schachermayr from Freudenberg Special Sealing Products Austria, the Leadcenter where the seal has been developed.
"Furthermore, our partnership with R744.com has already resulted in a growing number of inquiries for our innovative products. We are happy to see a growing market for CO2 Technology," he adds.
Background
Freudenberg Seals and Vibration Control Technology is a member of the Freudenberg group offering customized seals for automobiles, machinery and various other applications. In close cooperation with its Japanese partner NOK, Freudenberg is a leading global partner for sealing to its worldwide customers.
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More information:
› More about Freudenberg's Micro Sealing Lip in our Products Section
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