PTFE Rings
Precision CNC turned PTFE piston rings, rod seals, and hydraulic guide bands engineered for dry-running gas compressors, hydraulic cylinders, and chemical control valves. Delivers low breakout friction, high extrusion resistance, and zero cylinder bore scoring.
Types & Configurations of PTFE Rings
Non-Lubricated Compressor Piston Rings
Segmented or step-cut carbon-filled PTFE rings sealing dry breathing air and industrial gas compressors.
Hydraulic Glyd-Ring Piston Seals
Low-friction PTFE profile energized by an internal elastomeric O-ring for double-acting hydraulic cylinders.
Rotary Step-Seal Rings
Single-acting rod and shaft seals with stepped dynamic lip preventing hydraulic fluid bypass.
Split Hydraulic Guide Strip Rings
High-compressive bronze-filled PTFE guide rings guiding heavy pistons inside honed steel barrels.
Encapsulated O-Ring Cover Rings
Seamless thin PTFE sheath encapsulating a silicone or FKM core for universal chemical resistance.
Key Industrial Applications
Specifications & Technical Details
PTFE Rings 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 |
|---|---|
| Ring Diameters | 6.0mm up to 1,200mm single-piece diameter |
| Joint Configurations | Straight (butt) cut, 45° scarf cut, step (lap) cut, or uncut solid endless ring |
| Compounds | Virgin PTFE, 15% Carbon, 25% Glass, 60% Bronze, 15% MoS2, Polyimide filled |
| Reciprocating Velocity | Up to 15 m/s in lubricated systems / up to 4.0 m/s dry running |
| Leakage Rate | Meets ISO 19973 and ANSI hydraulic zero-leakage standards |
| Bore Tolerance Accommodated | Wide dynamic spring deflection compensates for worn cylinder liners |
| Operating Temp | -200°C to +260°C |
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 Rings.
Production Batch Gallery
Actual production batch examples of PTFE Rings 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.