CB Series Stepped Rod Buffer Seal
For over a decade, T-LON® Products has supplied the CB stepped rod seal to use in the Caterpillar Type B buffer seal groove. It is a proven reliable seal for both low and high pressure systems.
The CB seal is a single-acting filled TLON® PTFE compound with a custom designed rectangular profile elastomer energizer offering premium seal stability in reciprocating applications. The filled PTFE seal ring is manufactured with an interference fit with the rod and optimum compression with the O-ring energizer. The single-acting seal design must be assembled with the step facing the media to be sealed. The optimized lip profile removes the fluid film during rod extension and allows fluid return during rod retraction. To prevent seal damage during extreme pressure spikes, the stepped profile allows temporary leakage that is sealed by a secondary buffer seal to prevent fluid into the environment.
Advantages:
- Low seal drag/friction (Minimize energy loss)
- No Stick-slip (Smooth Operation)
- Long seal life from T-LON® filled PTFE compounds
Applications:
- Caterpillar® Hydraulic Cylinders
Technical Data:
(1) T-LON® seal compound determines allowable pressure and velocity ranges
- Velocity: Up to 13 ft/s
- Pressure: Up to 8500 psi (Function of e-gap and T-LON® compound. Max velocity and pressure cannot be used together)
Most Common:
BRONZE FILLED PTFE (“22”)
- Highest Extrusion Resistance
- Good sealability
2) Loader compound determines temperature and chemical compatibility
Most Common:
NBR SHORE 70 A (“P”).
- Working Temp. Range -30°F to 230°F (250°F intermittent)
- Commonly used with greases, aliphatic hydrocarbon mineral and vegetable oils, and various hydraulic fluids