Transparent plastic with high strength & rigidity

Udel® PSU (polysulfone) is a rigid, high-strength, semi-tough, transparent plastic that offers higher heat resistance and better hydrolytic stability than polycarbonate. It retains its good mechanical properties when exposed to steam and other sterilization techniques. 

Udel® PSU excels in many fluid-handling applications and has successfully replaced brass in pressurized hot water applications for over 20 years. It exhibits low creep under a sustained load at elevated temperatures and can withstand continuous exposure to hot chlorinated water. 

Key features 

  • HDT of 174 °C (345 °F)
  • High strength
  • Good practical toughness
  • Excellent hydrolytic stability
  • Transparent
  • Colorable


Typical applications 

  • Faucet components
  • Hot water fittings
  • Plumbing manifolds
  • Medical devices
  • Membranes: Hemodialysis, Water treatment, Bioprocessing, Food and beverage, Gas separation