Ningbo XiaYi Electromechanical Technology Co.,Ltd.
| Elongation @ break | 300% |
| Application | shock absorber |
| Delivery Time | one week for new samples |
| Hardness | 57-61 |
| Payment Terms | T/T,,L/C |
| Material | filled PTFE |
| Density | 2.17g/cm3 |
| Production machine | Automatic pressing |
| Supply Ability | 50,000pcs per day |
| Product Name | PTFE DISC |
| Size | D37.5XD17X0.60 |
| Packaging Details | Packed in plastic bag, then in carton with standard export package |
| Model Number | Customized PTFE DISC |
| Brand Name | XIAYI |
| Certification | IATF16949:2016 |
| Place of Origin | NINGBO,CHINA |
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Product Specification
| Elongation @ break | 300% | Application | shock absorber |
| Delivery Time | one week for new samples | Hardness | 57-61 |
| Payment Terms | T/T,,L/C | Material | filled PTFE |
| Density | 2.17g/cm3 | Production machine | Automatic pressing |
| Supply Ability | 50,000pcs per day | Product Name | PTFE DISC |
| Size | D37.5XD17X0.60 | Packaging Details | Packed in plastic bag, then in carton with standard export package |
| Model Number | Customized PTFE DISC | Brand Name | XIAYI |
| Certification | IATF16949:2016 | Place of Origin | NINGBO,CHINA |
| High Light | PTFE gasket for hydraulic dampers ，Precision molded PTFE ring gasket ，Hydraulic damper piston PTFE seal | ||
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.
Addressing Your Application ChallengesThin-Gauge Part Consistency: Producing PTFE gaskets at 0.60mm thickness with uniform material properties is technically demanding. Our automated pressing process with precision mold tooling delivers consistent thickness, density, and mechanical properties across every part, eliminating the variability that causes assembly line rejections.
Heat Build-Up in High-Speed Dampers: Continuous piston cycling generates frictional heat that can cause unfilled PTFE to soften and lose dimensional stability. Carbon fiber filling increases thermal conductivity by up to 3x compared to virgin PTFE, efficiently dissipating heat and maintaining gasket integrity during high-speed operation.
Fluid Additive Chemical Attack: Modern damper oils contain aggressive anti-wear and friction modifier additives that can chemically degrade standard seal materials. Carbon-filled PTFE resists virtually all hydraulic fluids, solvents, and chemical mediators while maintaining a very low coefficient of friction with no stick-slip (creeping) phenomenon.
Multi-Supplier Quality Drift: Maintaining consistent gasket performance across multiple sourcing locations is challenging. Our GB/T 19001-2008 / ISO9001:2008 certified quality system with IATF 16949:2016 compliance ensures process-controlled manufacturing with full lot traceability from raw PTFE resin through finished gasket.
Piston Ring Cut Geometry Selection: Selecting the wrong ring cut type for a given damper design leads to excessive leakage or premature wear. We offer straight cut, diagonal cut, stepped cut, and two-piece piston ring configurations, with application engineering support to help identify the optimal cut geometry.
| properties | unit | result |
| Apparent density | g/cm3 | 2.10-2.30 |
| Tensile strength(min) | MPa | 15.0 |
| Ultimate elongation(min) | % | 150 |
| Working Temp. | ℃ | -180~260 |
| Melting point | ℃ | 327 |
| Produce Max Temp. | ℃ | 385 |
| Size | mm | 20mm~400mm |
Mechanical properties: carbon fiber filled PTFE ring increases the hardness of PTFE and reduce cold flow or creep. Tensile strength and elongation usually are reduced depending on the filler type and percentage.
Thermal properties: carbon fiber filled PTFE ring increases thermal conductivity and also reduce liner coefficient of thermal expansion then increase thermal dimensional stability.
Type of filler Graphite:
1. Extremely low coefficient of friction
2. Chemically inert
3. Usually incorporated with other fillers such as glass or carbon
4. Increases wear resistance especially against soft metal
Inorganic filler: carbon fiber, Bronze, Glass fiber, etc
This carbon fiber filled PTFE rings are widely utilized into oil free air compressors. Most of rings are made of self-lubricating materials such as virgin PTFE and filled PTFE compounds like carbon filled PTFE and graphite filled PTFE, etc. All above grades are available
Type: Piston ring, straight cut piston ring, diagonal piston ring, stepped cut piston ring, two piece piston ring, etc.
Carbon fiber filled PTFE ring: it can resistant to almost all of the hydraulic medium, solvents, and various chemical mediators, has a very low coefficient of friction, no creeping phenomenon. Ozone resistance, weather resistance is excellent
| inspection item | Unit | Data |
| Bulk density | g/cm³ | 1.90(±0.10)-for sheet; 2.30(±0.20) for PTFE seal |
| Pressure Limit | Bar | 40 |
| Temperature Limit | 260 | |
| PH Range | 0-14 | |
| PTFE Seal thickness | MM | 0.5(±0.10)/side |
| Gasket Thickness | MM | 2(±0.10) or as customers' request |
1. Automotive Part
2. Motorcycle Part
3. Industrial parts
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
Frequently Asked Questions Q1: What is the advantage of 0.60mm thin-gauge PTFE gaskets for damper pistons?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.
Q2: How do I choose between straight cut, diagonal cut, and stepped cut piston rings?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.
Q3: Can carbon-filled PTFE gaskets be used in oil-free compressor applications?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.
Q4: What is the expected service life of a carbon-filled PTFE piston gasket?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.
Q5: Is the 15MPa tensile strength specification a minimum or typical value?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.
Q6: Do you maintain stock of common PTFE ring sizes for quick delivery?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.
Company Details
Business Type:
Manufacturer
Year Established:
2006
Total Annual:
1500000-5000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Founded in 2006 and headquartered in the strategic port city of Ningbo, China, XIAYI is a premier high-tech manufacturer specializing in the research, development, and production of precision shock absorber components and automated assembly equipment. With nearly two decades of indust... Founded in 2006 and headquartered in the strategic port city of Ningbo, China, XIAYI is a premier high-tech manufacturer specializing in the research, development, and production of precision shock absorber components and automated assembly equipment. With nearly two decades of indust...
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