Are you looking for the best graphite gasket factories in China? With so many options available, it can be overwhelming to choose the right one. In this article, we’ll compare the top graphite gasket manufacturers in China, helping you make an informed decision for your needs. Let’s dive in

Graphite Reinforced Gasket

Gasket: China

Product Details: Graphite gaskets are made from high-purity graphite, often reinforced with metal inserts such as stainless steel or tin-plated steel. They are available in various thicknesses (e.g., 0.6mm to 6.0mm) and sheet sizes (e.g., 1M x 1M, 1.5M x 1.5M). These gaskets are suitable for high-temperature and high-pressure applications, including steam, natural gas, and exhaust systems. They can withstand temperatures up to 3000°C in non-oxidizing atmospheres and are chemically resistant[1][3][4].

Pros:
– High performance in high temperature and high pressure environments
– Excellent chemical resistance and corrosion resistance
– Low friction surface and good ozone resistance
– Long storage life and high purity graphite content (≥ 99%)
– Suitable for various applications including steam, natural gas, and exhaust syst…

Cons:
– May not be suitable for strongly oxidizing reagents
– Requires technical evaluation for certain chemical resistances
– Can be overkill for lower performance applications

Graphite Sheet Manufacturers and Suppliers China

Graphite Gasket – JinSeal

Product Details: Graphite gaskets are made from flexible graphite materials, often reinforced with metal cores such as stainless steel foil or tangs. They are known for their high temperature and pressure resistance, with temperature ranges up to 1600°F (870°C) and pressure limits of 2000 psi (138 bar). These gaskets are highly compressible and compactable, offering low gas permeability and excellent chemical resistance. They are commonly used in applications such as heat exchangers, steam services, and industrial fluid sealing[2][3][4].

Pros:
– Excellent temperature and pressure resistance
– Highly compressible and compactable, allowing for low gas permeability
– Superior chemical resistance and stability in extreme conditions
– Low friction surface, reducing energy losses and heat buildup
– Can seal both smooth and coarse surface finishes
– Retains dimensional stability in high temperatures and pressure fluctuations

Cons:
– May require moderate bolt loads for effective sealing
– Can be more expensive than other gasket materials
– Limited durability in certain high-vibration or dynamic applications
– May need re-torquing in some cases, although creep relaxation is generally low

China Graphite Gasket Manufacturers and Supplier

Product Details: Graphite gaskets are made from homogeneous graphite or reinforced with stainless steel foil or tangs. They are used in high-temperature and high-pressure sealing applications, such as steam cycling, exhaust pipes, head gaskets, and industrial fluid sealing. These gaskets are available in various thicknesses (e.g., 1mm, 1.5mm, 2mm, 3mm) and can be customized to fit specific sizes and requirements. They have a density of 1.1 g/cm³ and can withstand temperatures up to 500°C (dry) or 650°C (steam) and pressures up to 140 Bar for reinforced types[1][3][4].

Pros:
– Excellent temperature range and high pressure resistance
– Soft and flexible material that conforms to surface imperfections
– Impermeable to gases and liquids
– Good radiation resistance and low coefficient of friction
– High corrosion resistance and long storage life
– Natural lubricant that minimizes shaft wear
– Low thermal expansion, reducing the risk of pipe bursts

Cons:
– Cannot be used with products intended for human consumption due to the risk of g…
– Higher tendency toward oxidation and lower tensile strength
– Softer material that can suffer from cracks, though remains sturdy when compress…
– Not reusable and may require additional support to reduce creep
– Lower-grade graphite might contain impurities that oxidize at lower temperatures…

Graphite Gaskets Manufacturers and Suppliers

China Professional Spiral Wound Gasket with …

Graphite Gaskets Manufacturer in China

Product Details: Graphite gaskets are manufactured from high-purity graphite materials, often reinforced with metal inserts or coatings for enhanced strength and stability. They are available in various styles, including pure graphite, reinforced graphite with tanged steel or stainless steel foil, and laminated graphite with polymer coatings. These gaskets are designed for high-temperature and high-pressure applications, including piping, valves, pumps, and generators. They offer excellent corrosion resistance, compressibility, and low friction, making them suitable for sealing against aggressive chemicals and steam.

Pros:
– High corrosion, pressure, and temperature resistance
– Excellent compressibility and low friction
– Chemical stability and resistance to most corrosive chemicals
– Suitable for extreme conditions including high temperatures and aggressive subst…
– High thermal and electrical conductivity
– Flexible and conformable to irregular sealing surfaces

Cons:
– May require specialized handling and installation due to the nature of graphite
– Can be more expensive than other gasket materials
– Limited availability of certain high-purity grades
– May not be suitable for applications requiring high tensile strength

Pure Expanded Graphite Gasket

Product Details: Pure expanded graphite gaskets are made from 98% pure exfoliated graphite, with high-quality grades available up to 99.8% purity for nuclear industry applications. They have a density of 0.7~1.0 g/cm³, compressibility of 30-45%, and recovery of ≥ 10%. These gaskets operate within a wide temperature range of -240°C to +550°C and can handle pressures up to 40 bar. They are chemically resistant across a pH range of 0-14 and are available in various dimensions including ASME B 16.21 and DIN2690 standards.

Pros:
– Widest temperature range (-240°C to +550°C)
– Excellent chemical resistance across a pH range of 0-14
– Very easy to cut, although large gaskets may need support
– High purity levels (up to 99.8%) available for critical applications
– Stable physical properties over the whole temperature range
– Provides excellent adaptability to any sealing surface

Cons:
– Large gaskets may need support during carriage and fitting
– Installation requires careful consideration of flange design, medium being seale…
– May require additional measures for installation in certain applications

Graphite PTFE Flat Ring Gasket

Product Details: Graphite and PTFE flat ring gaskets are used for static sealing in various industrial applications. Graphite gaskets are highly temperature-resistant, suitable for temperatures from -240°C to +550°C, and exhibit good chemical resistance and adaptability to uneven flange surfaces. PTFE gaskets offer universal chemical resistance, are suitable for temperatures up to 350°C, and are known for their ‘plastic’ nature which allows them to flow under pressure and improve the seal over time. Both materials can be customized to various shapes and sizes, and graphite gaskets can be reinforced with metal inserts for added strength and stability.

Pros:
– High temperature resistance
– Good chemical resistance
– Adaptability to uneven flange surfaces
– Universal chemical resistance of PTFE
– Ability of PTFE to improve seal over time
– Customizable to various shapes and sizes

Cons:
– Graphite gaskets can be difficult to remove from flanges
– Graphite gaskets may have a shorter service life compared to PTFE gaskets
– PTFE gaskets should be used in the thinnest size possible due to cold flow
– PTFE gaskets require initial loading pressure to develop and maintain a tight se…

Comparison Table

Frequently Asked Questions (FAQs)

Frequently Asked Questions About Graphite Gasket Factories in China

What are the typical applications of graphite gaskets produced in Chinese factories?

Graphite gaskets from Chinese factories are widely used in various industries, including refineries, chemical and petrochemical plants, paper mills, and industrial fluid sealing applications. They are also used in steam services, vibration dampening, and for sealing pipeline, valve, pump, pressure containers, heat exchangers, and reaction cauldrons.

What are the key technical specifications of graphite gaskets?

Graphite gaskets have impressive technical specifications. They can operate within a temperature range of -200°C to 650°C and handle pressures up to 10.0 MPa. They have a low pre-tightening specific pressure and a gasket coefficient of 2. The thickness can vary from 0.5mm to 4.0mm, and they can be made in large sizes up to 1500x2000mm.

How do Chinese manufacturers ensure the quality of their graphite gaskets?

Chinese manufacturers like Ningbo Techo Sealing Gasket Co., Ltd. and Jiangsu Sealstars Sealing Technology Co., Ltd. ensure quality by adhering to international standards such as ISO 9001:2015 and ISO 14001. They also have audited suppliers and skilled workers, which helps in maintaining high-quality production.

Can I request custom sizes and configurations for graphite gaskets?

Yes, you can request custom sizes and configurations. Many Chinese manufacturers offer the option to customize the size, thickness, and even the inclusion of metal eyelets on the inner and outer rings of the gaskets. They can also provide different types of graphite gaskets, such as laminated or reinforced with stainless steel cores.

What is the typical minimum order quantity (MOQ) and payment terms for graphite gaskets from Chinese factories?

The minimum order quantity (MOQ) can vary depending on the manufacturer, but it often starts from 1 piece or 250 kg for bulk orders. Payment terms typically include Telegraphic Transfer (T/T) and sometimes Western Union. Some manufacturers also offer flexible payment terms and can provide free samples, with sample preparation usually taking around 3 days.