ISO 9001 certified manufacturer in China. Spiral wound, metal jacketed, Kammprofile and camprofile gaskets engineered to ASME B16.20, API 601 and API 6A standards for oil & gas, petrochemical, power generation and chemical processing.
Semi-metallic gaskets represent a critical advancement in sealing technology, engineered to bridge the gap between the robustness of solid metal gaskets and the conformability of soft, non-metallic seals. At Kaxite Sealing, we specialize in the design and manufacture of high-performance semi-metallic gaskets that deliver unparalleled reliability in the most demanding industrial environments.
These gaskets are composite structures, combining metallic and non-metallic materials to create a seal that offers superior mechanical strength, excellent thermal resistance and exceptional adaptability to flange surfaces and operating conditions. They are the preferred choice for applications where standard rubber or fiber gaskets would fail, and where full metal gaskets are too expensive or difficult to install.
The metallic components, often in the form of a corrugated, wound or jacketed core, provide the structural integrity and spring-like recovery needed to maintain a seal under fluctuating pressures and temperatures. The non-metallic filler or facing material, such as flexible graphite, PTFE or ceramic fibers, fills the micro-imperfections on the flange faces, ensuring a tight, leak-proof barrier.
Constructed by winding a pre-formed V-shaped metal strip and a soft filler material around a center ring. The unique structure creates a labyrinth seal path and offers spring-like recovery.
A soft filler material fully enclosed in a thin metal jacket. The jacket provides structural integrity and blowout resistance, while the filler provides the primary seal.
Consist of a solid metal core with concentric grooves, covered with a soft sealing layer. Combines the high strength of metal with the excellent sealability of soft materials.
Similar to Kammprofile but with a different groove profile, offering excellent performance under thermal cycling and pressure fluctuations. Reusable in many cases.
| Gasket Type | Pressure Range (psi) | Temperature (°F) | pH Range | Primary Applications |
|---|---|---|---|---|
| Spiral Wound (Graphite Filler) | Vacuum to 2500+ | -400 to 1500 | 0-14 (Non-oxidizing) | Heat exchangers, pressure vessels, pipeline flanges |
| Spiral Wound (PTFE Filler) | Vacuum to 1500 | -320 to 500 | 0-14 (Full) | Chemical processing, pharmaceutical, food & beverage |
| Metal Jacketed (Graphite) | Up to 3000+ | -400 to 1200 | 0-14 (Non-oxidizing) | High-pressure pipe flanges, reactor heads |
| Camprofile (Graphite / Ceramic) | Up to 3500+ | -400 to 1800 | 0-14 (Varies) | Turbine casings, boiler manways, severe cyclic service |
| Kammprofile (Graphite) | Vacuum to 2200+ | -400 to 1400 | 0-14 (Non-oxidizing) | Heat exchangers, large diameter flanges, uneven surfaces |
Wellheads, flowlines, refineries, LNG facilities and subsea equipment.
Reactors, heat exchangers, columns and process piping for aggressive media.
Boilers, steam turbines, HRSG and high-temperature pipework.
Aggressive acids, caustics, solvents and ultra-pure media.
Exhaust systems, engine components and high-temperature sealing.
Sea water cooling, engine exhausts and offshore platform flanges.
Send your 2D/3D drawings, flange dimensions or old gasket samples. Our engineers review material, dimensions, tolerance and standard compliance within 24 hours.
Our engineers recommend the optimal winding, filler and ring configuration based on your temperature, pressure and media. Detailed quotation with MOQ and lead time.
We produce free samples for your quality evaluation. Sample lead time is typically 5-7 working days for standard materials.
After sample approval, we start mass production 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 semi-metallic gasket is tested per ASTM, ASME and API standards. We provide mill test reports, material certificates and third-party inspection reports upon request. Learn more about our company profile.
Our semi-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 winding, filler and ring configurations.
— Kaxite Sealing Quality Assurance TeamDistributors, OEM brands and EPC contractors worldwide.
MTR, material certificate and dimensional records for every batch.
Custom winding, filler, rings, logos and packaging. 24h response.
A German refinery EPC contractor ordered 3,500 pcs of SS316/graphite spiral wound gaskets to ASME B16.20. Batch MTRs and dimensional reports were provided for each shipment.
A UAE industrial distributor placed recurring monthly orders of PTFE-filled spiral wound gaskets for chemical service. Neutral packaging and private labeling were used.
A US power plant OEM ordered Kammprofile gaskets with graphite facing for steam turbine flanges. 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) · Third-Party Inspection (SGS / TÜV / BV on request) · Packing List & Commercial Invoice
The choice depends on service conditions and flange type. Spiral wound gaskets with flexible graphite offer the best combination of resilience, sealing performance and cost-effectiveness for a wide range of pressures and temperatures. Metal jacketed gaskets are used for high-pressure containment in tongue-and-groove or male-female flanges. Kammprofile and camprofile gaskets excel in severe cyclic service, high temperatures and on flanges with slight irregularities or large diameters.
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 semi-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.
The outer centering ring provides radial location, centers the gasket in the bolt circle and acts as a compression stop to prevent over-compression and crushing of the winding. The inner ring prevents inward buckling or erosion of the winding by the process flow, which is crucial for gaseous or high-velocity media. Kaxite Sealing recommends inner rings for pipe sizes above 4" or for services with potential for erosion.
For spiral wound and camprofile gaskets with graphite filler, a serrated finish of 125-250 µin Ra with 30-55 grooves per inch is ideal. For PTFE-filled gaskets, a smoother finish of 63-125 µin Ra is often sufficient. Always consult Kaxite Sealing or relevant standards like ASME B16.20.
Semi-metallic gaskets are generally designed for single use. During installation, the metallic winding deforms plastically and elastically, and the filler material compresses to conform to the flange. After disassembly, the gasket will not return to its original uncompressed state. Kaxite Sealing always recommends replacing the gasket during any maintenance disassembly.
Choose PTFE when your primary concern is extreme chemical resistance to aggressive chemicals at moderate temperatures. PTFE is also FDA-compliant for food and pharmaceutical applications and provides a contaminant-free seal. However, it has a lower temperature ceiling than graphite and is more prone to cold flow under sustained load. Graphite is preferred for higher temperatures and better thermal conductivity.
Yes. Kaxite Sealing manufactures semi-metallic gaskets using Hastelloy, Incoloy, Tantalum, Zirconium and other alloys to meet specific corrosion resistance needs in sour gas service, deep-sea applications or concentrated chemical processing.
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.
Send Inquiry Now Download Catalogue
