T-Seals are composed of a T-shaped elastomer supported by hard plastic back-up rings to prevent the seal from deforming or extruding into the clearance gap under high-pressure conditions that standard O-rings cannot withstand. The design is also considered to be more stable than an O-ring, as the T-seal shape helps to eliminate rolling or spiraling issues.

Our T-Seals fit standard O-ring grooves, allowing a direct replacement with no hardware modification required. They are double acting and are suited for both reciprocating and rotary motion equipment, with piston and rod profiles available.

Our standard T-seals are non-locking designs composed of a nitrile 70A sealing element and two integrated split nylon/polyamide back-up rings. Viton™ FKM sealing element and PTFE back-up rings are recommended for improved chemical resistance.

Hi-Tech Seals recommends increasing the sealing element hardness to 90A and/or upgrading to KasPex™ PEEK back-up rings for higher pressure (>5000 PSI) handling ability.

With proper seal design, material selection, and gland tolerances, our T-Seals are proven to handle well over 10,000 PSI. Please refer to the following T-seal Case Study.

T-Seal Applications

Our T-Seals are used in various applications, including but not limited to:

  • Actuators
  • Blow-out preventer (BOP)
  • Brake assemblies
  • Completion tools
  • Compressors
  • Control modules
  • Downhole tools
  • Fishing and jar tools
  • Gas lifts
  • High-pressure testing systems
  • Hydraulic cylinders
  • Pneumatic cylinders
  • Power steering systems
  • Pumps
  • Presses
  • Valves
  • Wellhead tools

T-Seals Profiles

Piston (TPO)

Rod (TRO)

Back To All Products