Low Friction PTFE Piston Ring for Automotive Dampers

Engineered for low-friction piston sealing in automotive damper applications, this MoS2 (molybdenum disulfide) filled PTFE gasket ring combines the self-lubricating properties of PTFE with enhanced friction-reduction from MoS2 filler. Produced through a meticulously controlled 13-hour sintering cycle followed by precision CNC machining, it delivers the dimensional accuracy and surface finish required for high-performance damper piston assemblies.

1. Good quality: We have strict quality control system. Good reputation in the market

2. Quality Control: Approved by GB/T 19001-2008/ ISO9001:2008

3. Fast and cheap delivery: We have big discount from forwarder(Long Contract)

4. Can produce according to customers' drawings

5. Advanced production equipment

6. Complete set of inspection equipment

MoS2 is a solid lubricant that synergistically enhances PTFE's already low friction coefficient. It forms a molecular-level transfer film on the mating metal surface, reducing both static and dynamic friction. This is particularly valuable in damper applications where consistent breakaway force and smooth transition from static to dynamic motion are critical for ride quality. MoS2-filled PTFE typically achieves 10-15% lower friction than unfilled PTFE in lubricated conditions.

The 13-hour sintering cycle is an optimized multi-stage thermal profile that includes gradual heat-up to avoid thermal shock and internal stress formation, extended high-temperature dwell at 370-385degC for complete particle fusion, and controlled cooling to achieve optimal crystallinity (typically 50-65%). This extended cycle eliminates the porosity and incomplete fusion that plague shorter sintering processes, resulting in superior mechanical properties, dimensional stability, and wear resistance.

Our CNC machining process achieves OD tolerance of +-0.03mm, ID tolerance of +-0.03mm, and thickness tolerance of +-0.03mm on the D32xD15x0.60 configuration. For production volumes, we conduct capability studies (Cpk analysis) and can provide statistical process control data. Tighter tolerances may be achievable through additional finishing operations.

Yes. Our PTFE gaskets are widely used in applications requiring high purity and corrosion resistance. Virgin PTFE grades offer exceptional chemical purity with no extractable plasticizers, curing agents, or processing aids. For semiconductor applications requiring ultra-low extractable metals, we offer specially cleaned grades. Food-grade (FDA 21 CFR 177.1550) certification is available for virgin PTFE grades.

Yes. We maintain capability for multiple filler systems including carbon fiber, MoS2, glass fiber, bronze, graphite, and blended formulations. While this product listing highlights MoS2 filling for low-friction applications, we routinely produce the same geometry in alternative filler compounds based on customer requirements. Our application engineers can help select the optimal filler system for your operating conditions.

The gaskets are rated for continuous operation at pressures up to 5 MPa and temperatures from -100degC to 250degC in typical damper applications. The broader material capability extends to 40 Bar pressure limit and 260degC temperature limit per application data testing. For applications approaching these limits, we recommend providing detailed operating conditions for a formal application review and material recommendation.