Radial lip seals have become one of the most critical components in today’s modern industrial and commercial equipment. That’s why PTFE and elastomer seal lip design is in the spotlight as a way to increase the life expectancy of heavy duty equipment.

Patterned surface design is surprising solution in heavy-duty assemblies

However, material composition and complex bonding aren’t enough. The fluid film within a large shaft seal environment can diminish quickly, leaving assemblies susceptible to failure at high rates of speed.
designs

Incorporating hydrodynamic aids in seal lip design

Hydrodynamic patterns
Hydrodynamic design elements assist seals in improving fluid pump rate. Specialized patterns molded into the surface aids seals in increasing under lip pressure.  The result – improved surface speed and reduced torque characteristics. Meanwhile, combining the dynamic properties of rubber with the super coefficient of friction found in PTFE further improves surface speed and torque, and maintains a cooler running temperature. The combination of both surface pattern and material composition translates into a longer life for the seal, and, therefore, equipment assembly.
Testing has proven seals with hydrodynamic design aids perform better at higher speeds, have a longer seal life, can overcome normal shaft lead, and have less running and breakaway torque.
Proven design
Vanseal bench tested a variety of hydrodynamic designs.  Seals were incorporated into demanding applications and exposed to extreme temperatures and a range of chemical environments. The results were impressive.  Vanseal’s hydrodynamic seal designs increased seal life five times over.
Ideal design applications
Use hydrodynamic design in shaft applications that turn in a singular or dual direction, making them ideal for use in heavy duty applications when extended service life and zero tolerance for leakage are necessary.  Hydrodynamic aids are beneficial for use in engine crankshaft seals, axle input pinion seals, transfer case input and output seals, and PTO seals.
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