Cooler, Longer Performance
In each ring set, the rings seal sequentially based on pressure, minimizing the number of rings in contact with the rod at any one time and limiting the amount of time any single ring is in contact.
This sophisticated sealing mechanism reduces frictional heat load and allows packing assemblies to run cooler, which reduces wear, extends run times and decreases maintenance costs. Piston rod temperature reductions of up to 100°F (38°C) compared to traditional rings have been observed.
The increased sealing capacity of each ring set also allows fewer cups and rings to be used. The first ring set does most of the sealing, reducing the pressure applied to subsequent rings and eliminating wear.