CR Series Piston Seal
For over a decade, T-LON® Products has supplied the CR hydraulic piston seal to use in the Caterpillare Type 1 piston seal groove. It is a proven reliable seal for both low and high pressure systems.
The CR seal is a double-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 bore and optimum compression with the custom energizer. This offers excellent sealability at low pressures and high pressures when the cylinder experiences ballooning. The rectangular profile energizer helps prevent the seal from rocking often experienced with a standard O-ring.
Face Grooves (Optional):
For applications of high pressure rise rates, pressure spikes, and rapid change of direction, the seal is apt to experience blow-by. To prevent blow-by and to energize the seal rapidly, face grooves are added to both sides of the seal.
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 velocity and seal life
- Velocity: Up to 12 ft/s
- Pressure: Up to 5,000 psi
(Function of e-gap and T-LON® compound. Max velocity and pressure cannot be used together)
Most Common:
GLASS/MoS2 FILLED PTFE (“31”)
- Good wear resistance for tubes with rougher surface finish
- More chemical resistant and used in applications when seal could run dry
(2) Loader compound determines temperature and chemical compatibility
Most Common:
NBR SHORE 70 A
- 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
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