NBR (Nitrile) is the baseline material for Well Service Pump Packing in mild service, resisting oils and water to 120°C. Aramid fabric reinforcement adds tear strength for 10,000 PSI. Cost-effective for cementing and water injection pumps. Limitations: swelling in aromatics, poor RGD. In low-rate fracs, NBR V-packs last 150 hours. API 6A compliance. Blends with Kevlar boost abrasion r... https://globalsealstech.com/product-category/oil-gas-seals/high-pressure-water-pump-seals/