Graphite, PTFE, rubber, non-asbestos and asbestos gaskets engineered for oil & gas, chemical, power generation, food and pharmaceutical industries. Die-cut, water-jet and CNC-machined to your exact specifications.
In the vast world of industrial sealing, non-metallic gaskets stand out as a critical category of components designed to create a static seal between two mating flanges. Their primary function is to prevent the leakage of fluids or gases under varying conditions of pressure and temperature.
Unlike their metallic counterparts, these gaskets are fabricated from flexible, compressible materials such as rubber, graphite, PTFE, compressed non-asbestos fibers and other engineered polymers. This composition allows them to conform to flange surface imperfections, ensuring a tight and reliable seal. They are indispensable in industries ranging from oil and gas, chemical processing, and power generation to food & beverage and pharmaceuticals, where safety, purity and system integrity are paramount.
A general-purpose material suitable for a wide temperature and pressure range. Excellent for water, steam, oil and many chemicals.
Offers exceptional chemical resistance across a broad pH spectrum. Highly flexible and creep resistant, ideal for corrosive services.
Superior performance in extreme temperatures. Excellent thermal conductivity and resistance to thermal shock.
Excellent resistance to oils, fuels and water. Commonly used in automotive and hydraulic applications.
Outstanding weather, ozone and steam resistance. Perfect for outdoor applications and hot water.
Maintains flexibility across a wide temperature range. Used in food-grade and high-temperature applications.
| Parameter | Description | Typical Range / Standards |
|---|---|---|
| Thickness | Nominal thickness of the gasket sheet or finished product | 0.5mm (1/64") to 6.0mm (1/4") |
| Density / Specific Gravity | Mass per unit volume, affecting compressibility and recovery | 1.0 - 2.2 g/cm³ (varies by material) |
| Compressibility | Percentage reduction in thickness under a specific load | 7% - 40% (ASTM F36) |
| Recovery | Ability to return to original thickness after compression load is released | 15% - 65% (ASTM F36) |
| Tensile Strength | Maximum stress the material can withstand while being stretched | 3 - 20 MPa (ASTM F152) |
| Max. Temperature | Continuous upper service temperature limit | -200°C to +1000°C (material dependent) |
| Max. Pressure | Maximum internal pressure the gasket seal is designed to contain | Up to 3000 psi (Class 2500 flanges) |
| pH Resistance Range | Range of acidity / alkalinity the material can withstand | 0-14 (PTFE), 2-12 (CNAF), 3-11 (NBR) |
| Standards Compliance | Industry standards for quality and safety | ASTM, ASME, DIN, ISO, FDA, USP Class VI, WRAS |
Covers the entire flange face including bolt holes. Used primarily with flat-face (FF) flanges for maximum sealing area.
Sits inside the bolt circle. Used with raised-face (RF) or male-female flanges where bolt-hole clearance is not required.
Gaskets cut from sheet stock to any custom shape, size or configuration for specific equipment. Advanced die-cutting, water-jet and CNC machining capabilities.
Refinery process piping, wellhead equipment, natural gas pipelines.
Reactors, heat exchangers, columns and aggressive chemical service.
Boilers, steam turbines, HRSG and high-temperature pipework.
FDA compliant gaskets for processing lines, tanks and filling equipment.
USP Class VI gaskets for sterile process and ultra-pure media.
WRAS compliant gaskets for pumps, valves and potable water lines.
Send your 2D/3D drawings, CAD files or physical samples. Our engineers review material, dimensions, tolerance and standards within 24 hours.
We recommend the optimal material based on your temperature, pressure and media. Detailed quotation including unit price, MOQ, lead time and packaging options.
We produce free samples for your quality evaluation. Sample lead time is typically 5-7 working days for standard materials.
After approval, we mass produce with full dimensional inspection, material certificates and batch traceability.
Custom logos, labels, protective film, poly bags and pallets. We support neutral packaging and private label for distributors and brands.
Worldwide shipping by sea, air and express. Full export documentation: invoice, packing list, CO, MTR, COC and third-party inspection reports.
Kaxite Sealing operates an ISO 9001 certified quality management system. Every non-metallic gasket is tested per ASTM, DIN and other international standards. We provide mill test reports, material certificates and third-party inspection reports upon request. Learn more about our company profile.
Our non-metallic gaskets are supplied to distributors, OEM brands and EPC contractors in 80+ countries. Every batch comes with mill test reports, material certificates and dimensional inspection records. We support full OEM and ODM with custom die-cut, water-jet and CNC-machined gaskets.
— Kaxite Sealing Quality Assurance TeamDistributors, OEM brands and EPC contractors worldwide.
MTR, material certificate and dimensional records for every batch.
Custom shapes, materials, logos and packaging. 24h response.
A German boiler manufacturer ordered 2,000 pcs of expanded graphite gaskets in 3.0mm thickness to DIN 3754. Batch MTRs and dimensional reports were provided for each shipment.
A UAE chemical distributor placed recurring monthly orders of virgin PTFE gaskets for aggressive acid service. FDA compliant certificates and neutral packaging were provided.
A US dairy equipment OEM ordered FDA and USP Class VI food grade rubber gaskets for filling lines. Samples were approved within 7 days and mass production started immediately after.
Mill Test Report (MTR) · Material Certificate · Dimensional Inspection Report · Certificate of Conformance (COC) · FDA / USP Class VI Compliance Statement (on request) · Asbestos-Free Declaration · Third-Party Inspection (SGS / TÜV / BV on request) · Packing List & Commercial Invoice
The choice hinges on your application conditions. Non-metallic gaskets are generally preferred for low to medium pressure and temperature applications, especially where flange loads are limited or where excellent conformability and chemical resistance are needed. Metallic gaskets are typically required for extreme pressures, extreme temperatures or high mechanical load. For intermediate conditions, semi-metallic options like spiral wound gaskets are ideal.
Our standard MOQ is 50 pieces for wholesale orders. For custom sizes and OEM gaskets, MOQ may vary depending on material and dimensions. Free samples are available for quality evaluation before bulk purchase.
Standard lead time is 7-15 working days for most non-metallic gasket products. Custom and OEM orders may require 15-25 working days depending on specifications and order quantity. Rush orders can be accommodated upon request.
There is no universal torque value. The correct bolt torque depends on the gasket material, thickness, flange type, bolt size and grade, and the required sealing stress. Using excessive torque can over-compress and crush a non-metallic gasket. Insufficient torque leads to leakage. Always follow the gasket manufacturer recommended torque specifications or industry standards like ASME PCC-1.
It is strongly recommended not to reuse non-metallic gaskets. Once compressed during installation, these gaskets undergo permanent deformation to conform to the flange surfaces. Reusing a compressed gasket will not provide the same sealing force and will likely lead to leaks. Always install a new unused gasket during any flange disassembly and reassembly.
Store gaskets in a cool, dry and dark environment away from direct sunlight, ozone sources and extreme temperatures. Keep them away from chemicals, oils and solvents. Sheet materials should be stored flat to avoid curling or creasing. Finished gaskets are best hung or stored in their original packaging to prevent distortion.
Common failure modes include blowout, creep relaxation, chemical attack and temperature degradation. Blowout is often due to insufficient bolt load or internal pressure exceeding the gasket rating. Creep relaxation happens under constant high temperature and stress. Prevention starts with correct material selection for the service conditions, proper flange alignment, correct surface finish and correct bolt tightening procedure. Regular inspection is also key.
Yes. Kaxite Sealing offers a dedicated range of non-metallic gaskets manufactured from FDA-compliant and USP Class VI approved materials for applications involving direct or indirect food contact, potable water and pharmaceutical processing. Our materials are also compliant with WRAS and 3-A Sanitary Standards. Certificates of compliance are available upon request.
Tell us your application temperature, pressure, media and flange standard, and our engineers will respond within 24 hours with a competitive quotation and free sample offer.
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