Backup rings support primary hydraulic seals in high-pressure applications, preventing extrusion into clearance gaps. Made from harder materials like PTFE or nylon, they are placed adjacent to O-rings or U-seals. In extrusion-prone environments, such as deep-well pumps, backup rings extend seal life significantly. Contoured or split designs facilitate easy installation. Using backup r... https://globalsealstech.com/hydraulic-seals/