Precision Molded PTFE Gasket for Hydraulic Damper Pistons

Precision-molded from carbon fiber filled PTFE compound, this ultra-thin (0.60mm) gasket ring is specifically engineered for hydraulic damper piston assemblies where space constraints and precise sealing performance are critical. The carbon fiber reinforcement significantly increases hardness while reducing cold flow and creep under the dynamic loading conditions typical of shock absorber operation.

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

The 0.60mm thickness provides an optimal balance between sealing compliance and stack-up height control in compact damper piston designs. Thinner gaskets reduce overall piston assembly height, allowing more compact damper packaging. Our carbon fiber filled formulation compensates for the reduced cross-section by providing enhanced creep resistance compared to virgin PTFE at equivalent thickness.

Straight cut rings offer the simplest geometry and lowest cost, suitable for low-to-moderate pressure applications. Diagonal (angle) cut rings provide improved sealing through longer leak paths, recommended for medium-pressure dampers. Stepped cut rings create the most tortuous leak path and are ideal for high-pressure applications. Two-piece designs offer installation flexibility for closed-groove pistons. Our engineering team can recommend based on your pressure and leakage rate requirements.

Absolutely. Carbon fiber filled PTFE rings are widely used in oil-free air compressors precisely because of their self-lubricating properties. They require no external lubrication and can operate dry against cylinder walls without galling or excessive wear. This same property makes them excellent for certain dry-running damper applications where oil contamination is unacceptable.

Service life depends on operating conditions including pressure, speed, temperature, and fluid compatibility. Under typical automotive damper conditions, our carbon-filled PTFE gaskets routinely achieve 500,000+ cycles in durability testing with minimal wear. For high-performance or racing applications with elevated temperatures and pressures, we recommend periodic inspection intervals and can provide accelerated life test data upon request.

15.0 MPa is specified as the minimum (min) tensile strength for our carbon fiber filled PTFE compound. Actual production values typically range from 16-20 MPa. We test tensile strength on representative samples from each production batch per ASTM D4894/D4895 standards. Higher tensile strength grades are available upon request for demanding applications.

We maintain buffer stock of our most popular filled PTFE compounds (carbon fiber 15-25%, glass fiber 15-25%, graphite 15%) in sheet and tube form for rapid CNC machining. Common ring dimensions in the 20-100mm OD range can often ship within 3-5 working days from stock. Custom sizes requiring new mold tooling take approximately 7 days for prototype delivery.