Rod U-Cup

Single acting seal for dynamic applications. U-Cups are compact and versatile lip type seals and can be supplied in a wide range of cross sections, diameters, and several configurations, e.g., AN style, rounded or flat lips, symmetric or asymmetric. These designs coupled with the wide range of available elastomer compounds result in a versatile line of sealing devices. PolyMod® and UltraMod™ U-Cups are low friction and long-life seals and can be used in tandem with rod wipers or rod scrapers, e.g., PolyEx™ Exclusion Device.  

PolyMod® low friction U-Cups are available in most materials- exceptions are silicone and fluorosilicone. UltraMod™ low friction U-Cups are available in fluoroelastomer compounds only.

Operating Ranges: 

  • Temperature: Approximately -65°F to +400°F (-54°C to +204°C), depending on the elastomer compound
  • Pressure: In general, pressures up to 1,000 PSI (7 MPa); higher pressures possible depending on seal configuration and the use of Back-Up Rings