Valve stem seals prevent leakage along valve stems passing through bonnets. These dynamic seals accommodate stem rotation or linear motion while maintaining pressure containment. Configurations include single or stacked O-rings, V-ring packings, and specialty designs. Stem surface finishes and hardness specifications ensure compatibility with seal materials. Proper stem sealing preven... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-wellhead-equipment-seals/