Engineered for demanding hydraulic piston applications, this capped T-seal combines three precision-matched components into a single, drop-in sealing solution: a PTFE cap for low-friction, chemical-resistant sealing contact; nylon back-up rings for anti-extrusion support under high pressure; and a rubber energizer core that maintains constant radial load against the bore wall throughout the full stroke cycle.
Key Features
PTFE Sealing Cap — Delivers excellent chemical compatibility, low breakout friction, and a long service life across a wide temperature range
Nylon Back-Up Rings — Prevent cap extrusion into the clearance gap at elevated pressures, maintaining seal geometry under dynamic loading
Rubber Energizer — Provides consistent radial force to keep the PTFE cap in firm contact with the cylinder bore, compensating for wear and dimensional variation
Capped T-Profile — Single-groove installation; no secondary anti-extrusion ring required in most standard hydraulic cylinder designs
Bidirectional Sealing — Effective in both directions of piston travel, suitable for double-acting hydraulic cylinders
Pneumatic and hydraulic piston assemblies requiring low stick-slip
High-cycle applications where seal longevity and consistent performance are critical
Material Summary
Cap: Virgin or filled PTFE
Back-Up Rings: Nylon (PA)
Energizer: Buna-N (NBR), EPDM, or FKM — specify compound when ordering
Sized to AS568 and SAE dash-number standards. Confirm bore diameter, rod diameter, groove dimensions, and operating pressure range when selecting the correct part number.
