About Us
Ningbo Kaxite Sealing Materials Co., Ltd.
Since 1990, Kaxite Sealing delivers high-integrity sealing components to over 60 countries. Our product range includes Spiral Wound Gaskets, Flange Insulation Kits, Expanded PTFE Sheets, braided packings, and custom die-cut gaskets for extreme environments. With ISO 9001:2015 and API 607 certifications, we ensure safety, durability, and compliance across oil/gas, hydrogen, nuclear, and chemical sectors.
- ✔ 30+ years of engineering excellence
- ✔ In-house R&D and testing lab
- ✔ Fast turnaround & global logistics
All Product Categories
Explore Our Solutions
As a buyer, you need reliable sealing under high pressure and temperature. Our gaskets cover spiral wound, PTFE, graphite, ring joint, and rubber types. Meet ASME B16.20, API 6A, and DIN standards. We offer custom sizes, fast sampling, and batch traceability. Widely used in oil & gas, chemical, and power plants. Request a quote with your flange spec – we deliver within 15–20 days.
Stop leaks in pumps and valves with high-density braided packing. Materials include PTFE, graphite, aramid, and carbon fiber. Temperature range -100°F to 2000°F, pH 0–14. Low friction, self-lubricating, and easy to install. We support custom cross‑section, length, and end‑finishing. Perfect for rotating and reciprocating shafts in water treatment, refineries, and food grade applications. Ask for our grade recommendation sheet.
Buy direct from a manufacturer of compression sheet materials: flexible graphite, PTFE, rubber, non-asbestos, cork, and mica. Thickness 0.5–5.0 mm, density up to 1.8 g/cm³. Excellent creep relaxation and chemical resistance. Suitable for gasket cutting, heat exchanger seals, and flange joints. We can supply rolls or die‑cut pieces. ISO 9001:2025 certified. Provide your media, temperature, and pressure – we’ll match the right grade.
For OEMs and gasket fabricators: source raw sealing materials in bulk. PTFE rods (SKU: KXT‑P100), tubes, films; graphite packing yarn; ceramic fiber tapes; anti‑corrosion wraps. High purity, consistent density, and easy machining. We offer custom dimensions, color matching, and private labeling. MOQ from 100 kg. Fast shipping from Ningbo port. Lab test report available for each batch.
Our Products
Featured Products
Standard Spiral Wound Gasket
Model:KXT-600
Standard Spiral Wound Gasket is one of the widely used seals, the spiral wound gasket depends on the mechanical characteristics of a formed metal strip which works as a spring, offering a better resilience under fluctuated pressure & temperature. They are widely used in the industrial field and fluid sectors.
Spiral Wound Gasket with Inner and Outer Ring
Model:KXT 600 CGI
The standard version is the Style CGI spiral wound gasket with inner and outer ring. This gasket has the best sealing characteristics combined with the highest safety for flanged joints with flat face and raised face
Spiral Wound Gasket with Outer Ring
Model:KXT 600CG
The standard version is the Style CGI Spiral Wound Gasket with Outer Ring with inner and outer ring. This gasket has the best sealing characteristics combined with the highest safety for flanged joints with flat face and raised face
Inner and Outer Ring of SWG
Model:KXT-R640
We Inner Outer Ring Of SWG make different inner and outer rings small than 14 inch.Large sizes also can be.
Special Materials Spiral Wound Gaskets
Model:none
Kaxite have special materials to produce Special Materials Spiral Wound Gaskets which have enough stocks and quick delivery.
Nuclear Spiral Wound Gasket
Model:KXT-610
Nuclear Spiral Wound Gasket is one of the most innovative and creative gaskets. Our idea of creative design conforms to occasions which with sudden change of temperature and fluctuation pressure.
Exhaust Spiral Wound Gaskets
Model:KXT600-EX
Automotive exhaust applications;Spiral wound type of the Exhaust Spiral Wound Gaskets;Excellent sealing performance;Insteand of expanded graphite gaskets with long using life.
Non-Rounded Spiral Wound Gaskets
Model:KXT-630
Non-rounded Spiral wound Gaskets for Boilers handholes and manholes.There are oval style and oblong style you can have.
HDPE Rod
Model:KXT-920HD
HDPE Rod has excellent temperature resistance, good chemical stability, can withstand the erosion of most acids and alkalis (it is not resistant to acid and has oxidation), insoluble in common solvents at room temperature, low water absorption, excellent electrical insulation performance; low density; toughness Good, has good tensile properties; good electrical and dielectric insulation; low water absorption; low moisture permeability; good chemical stability; tensile properties.
UHMWPE Sheet
Model:KXT-900HD
Ultra-high molecular weight polyethylenerefers to linear structure polyethylene with a molecular weight of more than 3 million.
UHMWPE Sheet It is an engineering plastic with excellent comprehensive properties. Its ability to withstand wear, impact, corrosion and self-lubrication, and the ability to absorb impact are these five properties that are currently available. The supremacy of plastics is known in the world as the UHMWPE Sheet"amazing material".
High-Temperature-Resistant Synthetic Stone
Model:KXT 800 HS
High Temperature Resistant Synthetic Stone is made of fiberglass and epoxy resin composites. It has good dimensional stability, corrosion resistance, low thermal conductivity, antistatic property, and non-flammability in the high temperature environment of 260-350°C. Suitable for solder protection in SMT wave soldering process. Easy to use, no broken, no delamination, no burrs, no irritation to the human body, can be customized according to drawings, easy to quickly process in CNC machine tools without damaging the tool.
Flexible Graphite Sheet
Model:KXT B201
Kaxite Flexible graphite sheet and rolls is made from high purity graphite, it is used can be expanded graphite particles formed by the high temperature expansion of repression, it retains the high temperature crystalline flake graphite, corrosion resistant, self lubricating, etc.
Why Global Engineers Trust Kaxite
- ✓ Certified Quality: ISO 9001:2015, ABS, and EU Pressure Equipment Directive (PED) compliant.
- ✓ Rapid Prototyping: In-house die-cutting and CNC winding for custom sizes (3" to 120").
- ✓ Global Shipment: Seaport & air freight to USA, Europe, Middle East, SE Asia within 7-15 days.
- ✓ Technical Support: Engineering team advising on gasket selection (ASME/API standards).
3000+
Active Clients Globally
25+
Years Export Experience
50+
Countries Served
ISO/API
Certified Facility
Industry-Specific Sealing Solutions
Hydrogen Industry Gaskets,Oil & Gas Flange Sealing,Pharmaceutical PTFE Gaskets
What Our Customers Say
Real experiences from global engineers
"Kaxite’s spiral wound gaskets arrived earlier than expected and passed our NACE MR0175 inspection. Their technical support helped us choose the right material for sour gas service."
- John M.
Senior Piping Engineer, Middle East Oil Refinery
Senior Piping Engineer, Middle East Oil Refinery
"We have been buying flange insulation kits from Kaxite for 3 years. Consistent quality, quick quotation, and their custom sizing saved us from field modifications."
- Sarah L.
Procurement Manager, US Chemical Plant
Procurement Manager, US Chemical Plant
"The expanded PTFE sheets are FDA compliant and perfectly smooth. Used them for our pharmaceutical reactors — no contamination issues. Highly recommend Kaxite."
- Dr. Hans W.
Process Engineer, German Pharma
Process Engineer, German Pharma
Frequently Asked Questions
Quick answers about sealing solutions
Spiral wound gaskets provide superior resilience under thermal and pressure cycling. Their metallic winding and flexible filler create a tight seal even on damaged or irregular flange surfaces, making them ideal for refineries, power plants, and chemical facilities.
Yes, isolating flanges prevent stray current corrosion in pipelines and storage tanks. Kaxite's insulation kits include G10/FRP gaskets, phenolic sleeves, and stainless steel washers to ensure full electrical isolation.
Our expanded PTFE sheets meet FDA 21 CFR 177.1550, USP Class VI, and are certified for oxygen service (ASTM G63). They are 100% pure PTFE, non-contaminating, and suitable for pharmaceutical/food contact.
Absolutely. Kaxite provides custom die-cut, waterjet cut, and spiral wound gaskets in any shape (oval, rectangular, complex). Provide drawings or flange details for a rapid quotation.
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Industry Insights & Technical Updates
Stay informed about sealing technology and best practices
2025-12-11
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2022-08-30
The octagonal metal ring gasket is installed in the trapezoidal ring groove on the flange surface. When the connecting bolt is tightened, it is axially tightened and the upper and lower trapezoidal grooves are tightened, resulting in plastic deformation, forming an annular sealing belt and establishing an initial seal. After boosting under the action of medium pressure, the ring gasket radially expands. The gasket and the inclined surface of the trapezoidal groove are more tightly attached, resulting in a self-tightening effect.
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2022-06-14
Flange insulation group is one of the most common, effective and important connection forms in petrochemical plants, natural gas plants, offshore oil projects, etc. Various pipelines, pipe fittings, valves, instruments and equipment, flange insulation groups have unique performance and advantages. Use insulation kit seals on flanges to protect your pipes from the risk of leakage, sealing is achieved by the fit of flanges, insulating washers, bushings, washers, washers, bolts and nuts. Flange junction is connected and sealed to prevent medium leakage at the flange junction, as well as anti-corrosion and conductive insulation Protect.
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The KNY250 oil-resistant asbestos rubber sheet exhibits outstanding resistance to oils, fuels, and solvents, coupled with high-temperature stability and mechanical strength, ensuring dependable sealing for gaskets in demanding industrial equipment.
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This article outlines the essential characteristics of KNY400 oil-resistant asbestos rubber sheets, focusing on their durability, sealing reliability, and chemical stability in demanding industrial environments.
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