In subsea API 6A gate valves, seal design must consider external hydrostatic pressure and limited access for intervention. Materials are selected for long‑term seawater exposure and cathodic protection environments, while seal geometries allow verification tests from remote panels. Redundant sealing arrangements are common to mitigate the high cost and risk of subsea maintenance opera... https://globalsealstech.com/product-category/oil-gas-seals/api-6a-gate-valve-seals/