HNBR downhole seal stacks balance elasticity and hardness for hydrogenated nitrile applications. 85-90 durometer compounds resist explosive decompression. Rapid gas decompression (RGD) testing per NORSOK M-710 qualifies materials. Molded V-rings ensure consistent geometry. Stacks handle sour gas environments with 15% H2S. Swell resistance maintains dimensions in hydrocarbons. Field re... https://globalsealstech.com/media/