U-cups, or U-seals, are popular rod and piston seals due to their symmetrical design. Their U-shaped cross-section provides excellent sealing under pressure. Made from polyurethane or nitrile, they resist wear and extrusion. U-cups work in both single and double-acting cylinders. Loaded U-cups with O-ring energizers handle higher pressures. Their low friction improves cylinder efficie... https://globalsealstech.com/hydraulic-seals/