In the most demanding industrial environments — where extreme temperatures, aggressive chemicals, and high-pressure conditions push ordinary sealing materials to their limits — one material consistently outperforms the rest: flexible graphite. With its exceptional thermal stability (up to 3000°C in inert atmospheres), outstanding chemical resistance, and remarkable compressibility and recovery properties, flexible graphite has become the gold standard for critical sealing applications in refineries, power plants, and chemical processing facilities.
That is why Ningbo Kaxite Sealing Materials Co., Ltd. was established in 2015 in Ningbo, Zhejiang Province — a global manufacturing hub with direct access to Ningbo Port. Our mission is to develop and manufacture premium flexible graphite sheets, tapes, packings, and gaskets that meet the most stringent industry standards, offering factory-direct pricing, full material traceability, and responsive technical support. Today, we are a trusted partner for industries including oil & gas, petrochemical, power generation, and automotive manufacturing across 60+ countries.
Today, we are proud to be a trusted flexible graphite manufacturer for customers across North America, Europe, Asia, and beyond — delivering reliability, consistency, and technical excellence in every product.
Flexible graphite withstands up to 3000°C in inert atmospheres — ideal for high-temperature flange sealing applications
Graphite resists attack from virtually all chemicals except strong oxidizers — perfect for aggressive media handling
Custom sizes, shapes, densities, and laminations — built to your exact specifications and quality standards
Our product portfolio encompasses over 15 categories of flexible graphite and advanced sealing products, including flexible graphite sheets, graphite tapes, graphite gaskets (die-cut and spiral wound), graphite packings, graphite yarns and braids, graphite laminates, reinforced graphite sheets (with tanged metal or foil inserts), graphite foil, and flexible graphite joint sealants. We also offer custom graphite die-cutting and lamination services for specialized sealing applications across a wide range of industries.
Pipeline flanges, wellhead equipment, refineries, and compressor stations
Boiler flanges, steam turbine seals, and high-temperature valve packings
Aggressive chemical service flanges, pump packings, and heat exchanger seals
Exhaust gaskets, engine seals, and high-temperature flange seals
High-temperature sealing for industrial furnaces, kilns, and incinerators
Seawater and high-temperature marine flange sealing systems
Unlike trading companies, we own and operate our entire production facility in Zhenhai District, Ningbo. Our workshop is equipped with advanced graphite processing lines — including high-temperature expansion furnaces, precision sheet calendering machines, lamination presses, die-cutting systems, and a fully equipped QC laboratory. Every batch undergoes rigorous inspection — including density verification, tensile strength testing, compressibility and recovery measurement, and dimensional precision inspection — ensuring full compliance with ASTM and international standards.
🏆 Committed to Quality — Our flexible graphite products are manufactured under strict quality control systems, ensuring consistent material properties, dimensional accuracy, and safety for every customer.
Graphite expansion, compounding, and material optimization
Expansion, calendering, lamination, and die-cutting processes
Custom gasket design, die-cutting, prototyping, and application engineering
Global shipping, customs documentation, and supply chain coordination
Factory entrance — Zhenhai, Ningbo
Graphite sheet calendering production line
QC laboratory — graphite material verification
Share your specifications — material grade, dimensions, quantity, and application
Receive a competitive factory-direct quote within 2 hours
We manufacture to your exact specifications with full quality control
Timely shipping with full documentation and traceability
Get a factory-direct quote within 2 hours — samples available upon request.
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