Density: 2.8–3.2 g/cm³
Dielectric Strength: 10–20 kV/mm
Contraction Percentage: 2.5–4.0%
Elongation at Break: 150–350%
Water Absorption: <0.05%
Tensile Strength: 18–28 MPa
Values may vary based on formulation and processing methods.
The Bronze and Carbon Filled PTFE Piston Ring is a self-lubricating, high-performance sealing component designed for oil-free, wear-resistant, and low-friction applications. By combining PTFE with bronze and carbon (or graphite) fillers, this composite material delivers outstanding durability, superior thermal conductivity, and enhanced mechanical stability, making it ideal for clean and demanding environments such as compressors, hydraulic systems, vacuum pumps, and food or pharmaceutical machinery.
Designed for oil-free, high-wear, and low-friction operating conditions.
Used in compressors, hydraulic cylinders, vacuum pumps, food and pharmaceutical machinery, and other systems that must avoid lubricant contamination.
Self-Lubricating: Excellent dry-running capability without external lubrication.
High Wear Resistance: Bronze and carbon fillers significantly improve wear life and mechanical strength—up to 5–8 times longer than pure PTFE.
Low Friction Coefficient: Ensures smooth operation and reduced energy consumption.
Creep Resistance: Enhanced dimensional stability and deformation resistance compared to pure PTFE.
Oil-Free Operation: Ideal for clean or sterile environments where contamination is unacceptable.
Typical Range: -200°C to +250°C
Composite of Polytetrafluoroethylene (PTFE) filled with bronze and carbon (or graphite).
Suitable for medium to high-pressure environments; typically capable of withstanding tens of MPa depending on design and dimensions.
Air & Gas Compressors: For air, oxygen, and nitrogen systems requiring absolutely oil-free output to protect sensitive equipment and catalysts.
Hydraulic Systems: Oil-free piston and guide rings for fire-resistant or clean hydraulic circuits.
Vacuum Pumps: Used in high-purity semiconductor and photovoltaic vacuum systems without oil vapor contamination.
Food & Pharmaceutical Machinery: Ideal for filling machines, homogenizers, and fermenters; compliant with FDA and USP Class VI standards.
Automotive & Aerospace: High-performance sealing for special engines, dampers, and environmental control systems.
Chemical & Process Industry: Resistant to aggressive media, performing reliably in chemical and metering pumps or valves.
Precision Manufacturing: Preforming and high-temperature sintering ensure even filler distribution and dense structure without internal defects.
High Machining Accuracy: Strict post-processing guarantees precise dimensions and stable shrinkage for perfect assembly fit.
Customizable Solutions: Formulation and dimensions can be tailored to operating conditions such as medium type, pressure, and speed, ensuring optimal performance.
The Bronze and Carbon Filled PTFE Piston Ring offers the perfect combination of durability, self-lubrication, and cleanliness. Its advanced composite structure delivers extended wear life, smooth operation, and zero oil contamination — making it indispensable for industries requiring reliability and purity, from compressors and vacuum pumps to pharmaceutical and semiconductor systems. With high precision and customizable design, it provides an efficient, maintenance-free sealing solution across a wide temperature and pressure range.
