T-seals combine the advantages of O-rings and square rings with anti-extrusion legs. They provide bidirectional sealing in reciprocating tools like safety valves and pumps. The T-profile reduces twist during installation and improves stability under pressure. Reinforced with Peek or PPS backups, they handle clearances up to 0.040 inches while maintaining low breakout force. https://globalsealstech.com/product-category/oil-gas-seals/downhole-completion-tools-seals/