FKM (Viton) suits high-temp Well Service Pump Packing to 200°C, resisting acids and steam in SAGD cementing. Low compression set for repeated gland adjustments. In header rings, pairs with PEEK backups for 18,000 PSI. Terpolymers add flexibility to -30°C. Gulf of Mexico acid pumps show 250-hour MTBF. Limitations: RGD, addressed by dense cures. DuPont’s Viton GLT passes ISO 23936-2. Es... https://globalsealstech.com/product-category/oil-gas-seals/high-pressure-water-pump-seals/