Cast Polyurethane Rings
Cast Polyurethane Rings
Tougher in a Wide Range of Applications
PSI produces cast polyurethane rings made from tough, premium grade urethane, which ensures they will hold up in a wide range of applications. With our urethane ring seals, you will reduce equipment downtime and save on material costs. PSI offers custom sizes, formulas, colors, and durometers (hardness). We also offer tight tolerances, ground finishes, and dual durometer rings.
PSI will help you develop prototypes and will deliver full production quantities when needed. Our custom rings have little or no tooling costs. PSI will custom formulate to meet your specific needs, including FDA wet or dry requirements.
BENEFITS OF POLYURETHANE RINGS
Cast polyurethane rings maintain their elasticity and strength over the complete range of hardness. They can be stretched and still return to their original dimensions, even at high durometers.
On the other side of elasticity is compression. Urethane is better than rubber when it comes to compression set and has a broader range of durometers (hardness) to fit many applications. At PSI, we have custom formulations in a variety of durometers ranging from “dead” for shock absorbing and “rebound” for repeated flexing. Urethane rings also maintain excellent resistance to chemicals, mineral-based oils, hydrocarbons, fats, greases, petroleum products, and specific solvents.
The technicians at PSI can even formulate urethane to remain flexible in Arctic-like conditions and temperatures as high as 250 degrees Fahrenheit, or to sustain sudden drops in temperature. (Though we don’t recommend continuous use in water hotter than 180 degrees Fahrenheit.)
Common Urethane Ring Applications
- Capper Rings
- Packing Rings
- Tubular Springs
- Inserts
- Seals
- Vibration Isolators
- Spacers
- Retainers
- Bushings
