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Advanced Sealing Solutions for Industry

NING BO HAN WEI INTERNATIONAL TRADE CO.,LTD – trusted manufacturer and exporter of high-performance sealing materials including braided packing, PTFE products, ceramic fiber fabrics, gaskets, and safety protection gear since 1980.

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Trusted Since 1980

Established in 1980, DONGRUN (NING BO HAN WEI INTERNATIONAL TRADE CO.,LTD) is a professional manufacturer and exporter of high-grade sealing solutions. We specialize in ceramic fiber products, fiberglass fabrics, asbestos-free alternatives, gland packing, PTFE materials, graphited products, and industrial gasket sheets.

With decades of experience, our products are engineered for durability, heat resistance, chemical stability, and mechanical reliability across oil & gas, chemical processing, power generation, and manufacturing industries.

40+
Years of Experience
50+
Global Markets
Manufacturing Facility

Our Products

Premium sealing and insulation materials designed for extreme temperatures, pressures, and corrosive environments.

PTFE Braided Packing

PTFE Braided Packing

Chemically inert, low friction packing ideal for pumps and valves.

HW-1019
Ceramic Fiber Yarn

Ceramic Fiber Yarn

High-temperature resistant fiber for insulation and weaving.

HW-3001
Fiberglass Fabric

Fiberglass Fabric

Reinforced textile for heat shielding and composite applications.

HW-2006
Graphited PTFE Packing

Graphited PTFE Packing

Enhanced thermal conductivity and wear resistance.

HW-1014
Spiral Wound Gasket

Spiral Wound Gasket

Metal-reinforced gasket for high-pressure flanges.

HW-8001
PTFE Joint Sealant

PTFE Joint Sealant

Non-curing tape for threaded pipe connections.

HW-5001
PTFE Tank Lid Packing

PTFE Tank Lid Packing

Seals large container lids with chemical resistance.

HW-1018
PTFE with Kevlar Fiber

PTFE with Kevlar Fiber

High-strength packing for aggressive media.

HW-1015
Safety Shoes

Safety Shoes

Industrial footwear with impact and slip resistance.

HW-7020
Desert Boots

Desert Boots

Lightweight protective boots for dry environments.

HW-7007
Insulation Tapes

High-Temp Insulation Tapes

For wrapping pipes and equipment in extreme heat.

PIP-813817
Gasket Sheet

Industrial Gasket Sheet

Custom-cut sealing sheets for flange applications.

Custom

Why Choose CN-Sealing?

We combine decades of expertise with rigorous quality control to deliver sealing solutions that perform under the most demanding conditions.

Extreme Temperature Resistance

Our ceramic fiber and PTFE-based products withstand temperatures from -200°C to over 1000°C, ensuring reliability in cryogenic and high-heat applications.

Chemical & Corrosion Resistance

Inert materials like PTFE and fiberglass resist acids, alkalis, solvents, and aggressive media, extending equipment life and reducing maintenance.

Global Industrial Standards

All products meet international quality benchmarks and are trusted by clients across 50+ countries in oil & gas, chemical, and power sectors.

40+
Years in Business
100+
Product Types
50+
Countries Served
1980
Founded

Frequently Asked Questions

What materials do you specialize in?

We specialize in PTFE, graphite, ceramic fiber, fiberglass, and non-asbestos sealing materials. Our product range includes gland packing, gaskets, insulation tapes, and safety gear.

Are your products compliant with international standards?

Yes, our sealing solutions meet or exceed ASTM, DIN, JIS, and other global standards. We provide material certifications upon request.

Can you customize products to specific dimensions?

Absolutely. We offer custom cutting, braiding, and fabrication services to meet your exact technical specifications and application needs.

What industries do you serve?

Our clients include oil & gas refineries, chemical plants, power stations, food processing, pharmaceuticals, and heavy manufacturing facilities worldwide.

Get in Touch

Reach out to our team for product inquiries, technical support, or custom solutions.

Contact Information

Name: PAN Xudong
Phone: +86-574-62195511
Mobile: +86-15058070808
Fax: +86-574-62195598
Email: [email protected]
Address: 10# Sangjia Road, Xinxin Industrial Area, Langxia Street, Yuyao, Ningbo, China
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