T-Seals feature an elastomer seal element with nylon or PTFE back-up rings to prevent the seal from extruding or rolling in the groove. Parker’s T-Seal product line is available in a variety of materials and configurations for industrial applications.

T-seals were originally developed to preserve advantages of O-rings in dynamic fluid power applications while ending two of their most serious reliability problems: (1) Extrusion through the gap between static and dynamic surfaces, and (2) Instability in their grooves, which led to spiral or twisting failure.

The T-seal eliminates both of these problems while retaining the space-saving attributes of the compact O-ring groove. Above all, the T-seal meets or exceeds the O-ring’s outstanding ability to seal at all pressures and temperatures. T-seals have been developed to replace existing O-ring seals in long-lived hydraulic and pneumatic systems. Their ability to fit into existing grooves means that a retrofit can be made with no re-machining or major revisions to the existing hardware design. This simplifies both field changes and new equipment manufacturing.