Welcome To Our Precision Gasket Industry

No.67,Xinhua Road, Xiaolin Town,

Cixi City,Zhejiang,China 315300

Call Us

+86-13566064802
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Choosing the Right Gasket

Our company specializes in the production of high-quality sealing products, including gaskets, packing, 
and other critical sealing components.
Heavy-Duty Metallic Gasket for Pipelines

Kamprofile (Serrated) gasket is mechanically made from integral metal. Groove of concentric circles by processing with professional equipments. It can be better sealed then the general metallic flat gasket. It is suitable for use on the flange pipe of high pressure and high temperature. 

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DH-T-FB Reinforced Graphite Sheet
DH-T-FB Reinforced Graphite Sheet is a high-performance sealing material designed for extreme temperature and pressure conditions. Made from high-purity graphite reinforced with stainless steel, Inconel, or other metal inserts, it delivers superior thermal conductivity, chemical resistance, and mechanical strength.

This advanced sealing solution is ideal for flange gaskets, heat exchangers, refineries, and high-temperature industrial applications** where traditional materials fail.
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DH-T-EPB Expanded PTFE Sheet
​DH-T-EPB Expanded PTFE (ePTFE) Sheet is an advanced microporous material developed through a unique expansion process that transforms standard PTFE into a highly flexible, fibrillated structure. This innovative manufacturing technique creates a material with exceptional sealing performance while maintaining PTFE's renowned chemical resistance and thermal stability. ePTFE sheets are widely recognized as premium sealing solutions across multiple industries.
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DH-T-PB PTFE Sheet
DH-T-PB PTFE Sheet (RPTFE) is an enhanced polytetrafluoroethylene material manufactured through a specialized compression molding process using pure PTFE resin. Compared to standard PTFE sheets, Reinforced PTFE (RPTFE) offers superior mechanical strength and dimensional stability while maintaining PTFE's exceptional chemical inertness and temperature resistance. This product is widely used in sealing, gasketing, and insulation applications across chemical, mechanical, and electronic industries.
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Heat-Resistant Graphite Gasket for Exchangers​

Gaskets are available to EN 1514-1, ASME B 16.21. Custom dimensions are available on request.

Thickness:1.0mm~ 20.0mm

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Food-Grade Pure PTFE Gasket for Equipment​

PTFE gasket is made by cutting PTFE stick, pipe and sheet into flat shape, V shape gasket or valve annulus. It has 100% PTFE structure. It can bear the most bitter chemical medium, and has good anti-creeping.

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Services We Provide

Non-Standard & Drawing-Based Customization
Precision Manufacturing: Translate your CAD drawings (DWG/SOLIDWORKS...
Technical Consultation & Product Matching
Operational Audit: Analyze your、Failure-Preventive Matching、Cost...
Logo Customization Service for Branded Sealing Products
Logo Customization Options:We offer multiple techniques to...

About Us

A Precision Gasket Manufacturer
Established in 2004 as Cixi Xinsheng Sealing Factory, we have evolved into Ningbo Dongheng Sealing Co., Ltd. in 2020, building on over 20 years of expertise in manufacturing high-quality sealing solutions.

Why Choose Us

Our company is a professional sealing gasket manufacturer, has more than 20 years of development, the main products are spiral wound gasket,Kammprofile gasket,ring joint gasket, PTFE gasket and gland packing etc...
 OEM/ODM Capabilities
 Technical Consultation Services
 Emergency Order Handling

Our Industries

We take pride in delivering reliable and durable solutions tailored to meet the demanding requirements of various industries, such as oil & gas, chemical processing, power generation, and manufacturing.
Petroleum
Natural Gas
Chemical Processing
Metallurgy
Power Generation
Manufacturing
DIGITAL SHOWROOM
If you want to learn more about our manufacturing capabilities, you can click on the avatar in the scene, or accept my invitation!
Latest News & Updates
April 16, 2026

Gasket sealant plays a crucial role in mechanical assemblies, providing additional sealing between mating surfaces and preventing leaks of fluids, gases, or chemicals. While not all gaskets require sealant, understanding when and how to use it ensures long-lasting performance, easier maintenance, and protection against environmental and operational stresses.

April 16, 2026

Proper sealing is essential for the reliable and safe operation of machinery and industrial systems. Gaskets and seals, though often confused, serve distinct purposes: gaskets are ideal for static connections, filling gaps between stationary surfaces, while seals are designed to handle motion, preventing leaks in dynamic applications.

April 16, 2026

Gaskets are essential components in industrial and commercial equipment, ensuring leak prevention, safety, and system reliability. Selecting the appropriate gasket material is critical because each industry has unique operational conditions, including temperature, pressure, chemical exposure, and regulatory standards.

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+8613566064802

Address

No.67,Xinhua Road, Xiaolin Town,Cixi City,Zhejiang,China 315300
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