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Norell Inc 5mm, 800MHz 7" EXTREME SERIES LEVEL 3 VALVED THIN WALL NMR TUBE FOR HIGH PRESSURE, 1 TUBE PER PACK
Supplier: Norell Inc S5800EX3HPV7
Level 1 includes an additional fluoroelastomer o-ring seal to augment the existing fluoroelastomer o-ring, thus providing a secondary, backup o-ring if the primary one leaks or fails because of wear or physical damage. Level 3 incorporate additional chemical and solvent resistance over Level 1 by the substitution of Kalrez perfluoroelastomer o-ring(s) in place of the fluoroelastomer o-rings. Kalrez perfluoroelastomer is made from tetrafluoroethylene, and is virtually chemically identical to PTFE fluoropolymer, but physically Kalrez behaves as an elastomeric material, unlike PTFE. Kalrez furnishes the same unsurpassed chemical resistance and degree of inertness as that of PTFE, while affording a higher service temperature limit (up to 288°C compared to 260°C for PTFE) and no propensity to cold flow (or distort under a constant mechanical force or pressure).
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