What is a U+S Hydraulic seals? A U+S hydraulic seal is a high-performance, combined reciprocating seal widely used in heavy-duty hydraulic cylinders. As a specialized type of hydraulic seals, it integrates a U-cup seal and a star-shaped (X-ring) energizer to deliver superior low-pressure response, high-pressure durability, and wear compensation. This composite design solves common sealing […]