Chemical-Resistant O-Rings for -42C Temperatures

High-performance chemically resistant Kalrez O-ring seals, which are available from Dichtomatik, are rated for operation at temperatures down to -42C. These products are part of the Dupont Kalrez Spectrum perfluoroelastomer range, which has proven capability with over 1,800 chemicals, solvents and aggressive fluids, and offers sealing performance and elasticity for operation in freezing cold environments. The Kalrez Spectrum 0040 material is suitable for performance at high altitudes and arctic latitudes, making them suitable for operations in hostile environments.

This includes use in hydrocarbon processing equipment involving cold start-ups, hose couplings for chemical transport equipment, manhole seals for rail cars or wherever operating conditions down to -42C may occur. The upper service temperature limit for these products is 220C, with an approximate volume swell of 10 per cent when exposed to nitric acid for a duration of 168hrs. Compression-set resistance is similar to other Kalrez products in the range, which also incorporate the same high levels of chemically resistant protection.

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