The 135 Series U-cup seal is a popular choice to replace V-packing sets. It is a highperformance, double-lipped seal for use as in high-clearance applications, typically in moderate to high-pressure environments. Its full-face backup ring encapsulates the seal to add stability under high-pressure conditions, while preventing extrusion. The asymmetrical design of the U-cup ensures the lip forces are optimized for every cross section and diameter. Manufactured in a variety of materials and sizes from 6mm up to 2 meters in standard or custom diameters.