PTFE Seals
High-performance engineered PTFE sealing systems designed for operating conditions beyond the physical limits of conventional elastomers. Features spring-energized U-cups, rotary shaft lip seals, and multi-V chevron packing sets.
Types & Configurations of PTFE Seals
Spring-Energized Cryogenic U-Cup Seals
PTFE seal jacket energized by an internal Elgiloy® or stainless steel V-spring for LNG and liquid oxygen.
Rotary Shaft Cased PTFE Lip Seals
Stainless steel cased seals with hydrodynamic spiral PTFE sealing lip running dry up to 30 m/s.
Multi-V Chevron Packing Sets
Alternating virgin and filled PTFE V-rings with male and female adapters for chemical valve stems.
Back-Up Rings (Spiral & Contoured)
PTFE backup rings preventing rubber O-ring extrusion under high hydraulic pressure cycles.
Rotary Flange Face Seals
Machined PTFE seals with internal energizer spring sealing semiconductor vacuum chambers.
Key Industrial Applications
Specifications & Technical Details
PTFE Seals can be precision-manufactured in custom dimensions, wall thicknesses, cross-sections, and durometers to match your exact application specifications. Below are typical engineering cross-section drawings and technical parameters for reference.
Typical Dimension Drawings & Blueprint Cross-Sections
Technical Specifications
| Parameter | Specification / Options |
|---|---|
| Pressure Rating | Vacuum 10⁻⁹ Torr up to 700 bar (10,000 PSI) hydraulic pressure |
| Surface Speed | Up to 30 m/s rotary shaft speed; up to 15 m/s reciprocating speed |
| Spring Energizer Options | V-Spring (cantilever), Helical Ribbon Spring, Full Contact Coil Spring |
| Spring Alloys | Stainless Steel 301/304/316, Hastelloy® C-276, Elgiloy® (NACE compliant) |
| Friction Coefficient | Extremely low dynamic breakout force (prevents stick-slip chatter) |
| Media | Liquid Oxygen (LOX), Liquid Hydrogen, aggressive solvents, superheated steam |
| Operating Temp | -260°C (cryogenic) to +280°C continuous |
Material Selection & Properties
We offer specialized compound formulations tailored to chemical media, thermal extremes, static deflection, and dynamic fatigue requirements. The best material depends on your operating environment and required service life.
| Material / Polymer | Key Engineering Properties | Recommended Applications & Considerations |
|---|---|---|
| Virgin PTFE (Teflon™) | Universal chemical inertness (pH 0-14), temp up to +260°C | Pharmaceutical seals, cryogenic valve seats, gaskets |
| 15% / 25% Glass-Filled PTFE | Reduced creep/cold flow under compressive mechanical load | Hydraulic backup rings, cylinder piston wear bands |
| Carbon / Graphite Filled PTFE | Low friction, high thermal conductivity, dry running | Compressor rider rings, dynamic rotary shaft lip seals |
| Bronze-Filled PTFE (40% / 60%) | Maximum compressive strength & thermal dissipation | Heavy hydraulic guide rings, high-pressure piston cups |
| Modified / TFM PTFE | Lower permeation, smoother surface finish, higher fatigue | Semiconductor ultra-pure valves, diaphragm pumps |
Important Engineering Guidance
The above properties are general characteristics. Final material selection depends on your specific application, operating conditions, load requirements, media compatibility, and service temperature. Please contact our polymer engineering team for tailored compounding guidance on PTFE Seals.
Production Batch Gallery
Actual production batch examples of PTFE Seals manufactured for OEM, automotive, railway, and heavy engineering clients. We manufacture standard catalogue sizes as well as bespoke custom geometries from your CAD models or physical samples.
Request an Engineering Quote
Share your required dimensions, polymer grade, or 2D/3D drawings for immediate engineering review and quote.