PTFE U Rings

PTFE U‑Rings are designed for reciprocating applications where conventional elastomer seals fall short, and they withstand extreme pressures, aggressive chemicals, and wide temperature ranges with exceptional reliability.

Engineered for hydraulic and pneumatic cylinders, actuators, and other critical linear motion systems, these seals provide low‑friction performance, extended service life, and superior resistance to extrusion under demanding conditions. While primarily used in reciprocating motion, PTFE U‑Rings can also support light rotary applications where low friction and chemical resistance are essential.

Temperature Range

Operates reliably from -200°C to +260°C across extreme environments

High-Speed Capability

PTFE U‑rings typically handle dynamic speeds up to around 15 m/s across both reciprocating and lower‑speed rotary applications

Contaminant Protection

Designed to handle high system pressures with stable sealing performance, even in demanding dynamic applications

Prevent Leakage

Engineered to prevent leakage for consistent and efficient system operation

Seal Designs & Features

PTFE U Rings are engineered for high performance reciprocating applications, offering:

• Spring assisted sealing to maintain contact pressure and compensate for PTFE deformation
• Low friction PTFE blends with optional fillers such as glass, carbon and MoS₂ to reduce wear and prevent stick slip
• Excellent chemical and thermal resistance, operating from –200 °C to +260 °C
• Dry running capability for minimal lubrication environments
• High pressure resilience with extrusion resistant profiles and optional backup rings
• Rapid prototyping through precision machining without the need for expensive tooling

Engineered for your application

Optimised sealing for hydraulic cylinders and pneumatic actuators, supplied as a complete system including:

• Rod seals to retain hydraulic fluid and prevent contamination
• Piston seals to separate pressure zones and maintain efficiency
• Static seals for end caps and other chemically and pressure‑resistant locations
• Material options that improve wear resistance and dimensional stability
• Anti stick slip profiles for smooth reciprocating motion under varying loads
• Anti extrusion elements for extreme pressure conditions
• Full R&D support for validation in critical environments

We specify these as part of a complete sealing system, integrating complementary components to ensure optimal performance and reliability.

Why FTL?

FTL acts as a technical partner from specification through to full system integration, ensuring PTFE U Ring solutions are engineered for long term reliability. Our application driven approach allows us to select suitable materials, optimise sealing geometry and support correct installation for dependable performance over extended duty cycles.

With in house precision machining, fast turnaround and no tooling costs for prototypes, we help accelerate validation and reduce project risk. Proven in harsh chemical, thermal and pressure environments, FTL provides robust sealing solutions backed by engineering expertise and responsive technical support.