Precision Associates’ Homogeneous Rubber U-Cups are the seal of choice for Pneumatic and low-pressure Hydraulic applications. Because U-Cups do not rely on initial compression to seal, they are excellent in applications that require low breakaway pressure. The sealing lips on Precision Associates’ U-Cups are molded – not cut, so they are always symmetrical. The sealing lip has a very slight radius, reducing the likely hood of wiping all of the lubricant, which might cause a dry surface that leads to wear and early seal failure.
Precision Associates’ U-Cups are available off the shelf in our 70 and 80 Durometer Buna N and Fluoroelastomer compounds. For unusual applications, one of PAI’s 1,000+ specialty materials, including our N-Dure extended wear compounds, may be your solution. If not, PAI can design a compound especially for you.