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  1. gagandeepsidhu

    Effect of hardness on chemical compatibility of HNBR

    We use HNBR (Hydrogenated Nitrile Butadiene Rubber) for a bladder cage in seal on our drilling tool. The bladder cage act as oil container for seal. The current recommended hardness spec ask for 85 +/- 5 duro hardness. Vendor is having a hard time in avoiding entrapped air which cause deffects...

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