Why Choose Us?
Rich Experience
Beijing North Xinyuan Technology Co., Ltd. was established in 1993. After nearly 20 years of business development, it has successively established Beijing North Xinyuan Electrical Carbon Products Co., Ltd., Supply and Marketing Branch, and Science and Technology Development Branch. Formed today's North Xinyuan Electric Carbon Group.
Wide Product Range
Our company main products are divided into six series (namely carbon graphite products for the electronic and semiconductor industries, carbon graphite products for diamond tool sintering molds, carbon graphite products for metal smelting and processing, carbon graphite products for the photovoltaic industry, carbon graphite products for industrial furnace processing, and carbon graphite products for laboratory analysis).
Production Market
The company has the right to conduct self-operated import and export business and is a diversified outward oriented enterprise that is fully applicable to the WTO market. In addition to being sold to various industries in main provinces and cities of China, the company's products are also exported to more than 20 countries and regions overseas.
Professional Team
The company has professional technical talents, enterprise management talents, advanced graphite processing equipment, exquisite production technology, and advanced graphite processing technology, as well as professional graphite CNC processing centers, etc. It can process various difficult graphite products according to customer requirements and providing customers with integrated services from design programming to machining.
What is Graphite Gasket?
Graphite gaskets offer high corrosion, pressure and temperature resistance. A soft yet incredibly strong material, its low friction composition creates an effective seal that reduces energy losses and the build-up of heat. The injection of filler materials further adds to the stability and tolerance of gaskets that are widely used for piping, valve, pump and generator applications.
Graphite thermal sheet is a new thermally conductive and heat dissipating material that conducts heat evenly in two directions.
The design of diamond die-casting graphite molds plays an increasingly important role in the modern manufacturing industry.
Diamond tools of graphite refer to tool products that use a binder to consolidate diamond into a certain shape, structure, and size, and are used for processing.
Graphite thrust bearings are generally composed of two thrust washers or more thrust washers and several rolling elements.
Graphite saw blade is based on a special tooth design and the use of special carbides.
One type of graphite gasket is cut or stamped from pure graphite plate or metal (toothed plate, flat plate, mesh) reinforced graphite plate.
Diamond sintering molds are made by using the characteristics of artificial graphite material with very small thermal deformation.
Graphite Waterway for Diamond Core Bits
The graphite waterway is a key component required in the high-temperature sintering process of diamond drill bits.
Benefits of Graphite Gasket
Graphite gaskets have a range of properties that make them ideal for certain applications. While there are plenty of other materials on the market that offer their own levels of protection against temperature extremes and general corrosion, graphite gaskets deliver a total package of properties that is 100% unique. For example:
Temperatures – Graphite gaskets take temperature tolerance to all-new levels. Depending on the grade of graphite used in the production of the gaskets, temperatures as low as -20 degrees and as high as several thousand degrees. Where extremes of temperature are present, graphite is a superior choice. With their strong thermal resistance, they also have a fantastic resistance to thermal shock. This is a type of damage that occurs when components are subjected to rapid changes in temperature and can significantly impact their performance.
Corrosion – Graphite also happens to be incredibly resistant to corrosion regardless of the pressure or heat being faced at the time. Where others would fail, graphite retains its integrity.
Strength – The mechanical strength of graphite is also extraordinary which makes it a great choice in heavy-duty environments or when long-term reliability counts.
Storage – And when it comes to graphite spares, the material has an infinite storage life meaning that it will never be compromised by age.
Common Graphite Gasket Materials
There are three commonly used graphite materials which are chosen to ensure that the gaskets remain flexible and adapt to different changes. These include:
· Pure graphite sheet.
· Graphite sheet that is reinforced with a tang core.
· Laminated graphite sheet with stainless steel insert.
Gaskets are typically produced using a sheet and role material. This material has a density of 70 lb/ft 3 (1.1 g/cc). Graphite sheets for engine gaskets are also available with thicknesses ranging from 1.6mm to 2.0mm.
Graphite gaskets can be manufactured from material graphite. This contains a total level of carbon content that is between 90 - 99%. The percentage of carbon positively correlates with the amount of flexibility provided by graphite gaskets.
Graphite gaskets can also be reinforced with a variety of different materials. This includes aluminum foil, nickel alloy, wire mesh and polyester film. The material ensures that the gasket has additional levels of strength which guarantee the best possible performance.
Graphite gaskets may also be made from branding materials that are popular in the industry. These materials are available in a range of different thicknesses and styles depending on applications and requirements.
Graphite gasket materials' resistance to high temperatures and pressures has already been mentioned. They have a few other beneficial attributes as well. They are non-hazardous, meaning they present no potential dangers for installers or repair technicians who handle them. They are also safe for people to work around every day.
Graphite gaskets are also exceptionally strong and durable. They are resistant to corrosion, regardless of heat and pressure. They also have a low level of creep relaxation – the measure of how much a gasket material thins out under pressure – so it retains the same thickness, helping to maintain a tight, steady joint. Once installed, graphite gaskets will not need to be replaced for a very long time.
Lastly, graphite is a non-stick material, which is crucial, because it enables gaskets to keep a joint sealed, moving around to fill uneven gaps when necessary.
Flexible graphite gaskets can reach high temperatures while maintaining resistance to liquids and gasses. Yet, any higher than 850 degrees Fahrenheit, you'll want to consider using mica or vermiculite.
Graphite gaskets are fire-safe but non-reusable. They also have a higher tendency toward oxidation and lower tensile strength.
While graphite is softer and can suffer from cracks, flexible graphite seals remain sturdy when compressed between flanges. Depending on your design and chosen material, they can be more affordable than other options.
Given the outstanding features of graphite gaskets, they can surely benefit a lot of industries, especially their high-level applications and operations.
Some of the industries that can benefit from graphite gaskets are chemical and petrochemical, paper, cryogenic, and electrochemical industries. Graphite gaskets can also be maximised in vibration dampening, steam services, and thermal applications.
What is common about these applications is that they tend to maximise high temperature and high pressure. And so, if you need gaskets for high temperature and high-pressure applications, then you should opt for those that are made from gaskets.
Graphite gaskets offer exceptional performance across a wide temperature range, making them suitable for applications in extreme environments where conventional gasket materials may fail. The temperature range for graphite gaskets typically varies depending on factors such as the grade of graphite used, the presence of fillers or reinforcements, and the specific application requirements.
However, as a general guideline:
Low Temperature Limit: Graphite gaskets can effectively seal at cryogenic temperatures as low as -200°C and even lower in certain cases. At these extremely low temperatures, graphite retains its flexibility and sealing properties without becoming brittle or losing its integrity.
High Temperature Limit: Graphite gaskets exhibit remarkable thermal stability, allowing them to withstand elevated temperatures up to 500°C and beyond in some applications. The high-temperature resistance of graphite is attributed to its inert nature and ability to maintain structural integrity at extreme heat levels.
Graphite Gasket, Flexible Graphite Sheets and Die Cut Gaskets
Graphite gaskets are die cut from thin, lightweight sheets that are made of natural or synthetic materials. In pure form, natural flake graphite is free of fibers, binders, and other additives that are used to impart or enhance specific material properties. Synthetic graphite is more porous and less dense than natural graphite, which has a more crystalline structure.
Die cut graphite gaskets are also supplied as expanded sheet materials that contain a foil reinforcement. These sandwich-like structures bond the metal foil between two graphite sheets but still support precision die cutting for fast, efficient parts production. Some graphite sheet materials are reinforced with a tanged metal plate or metal mesh instead.
One of the most versatile yet under-appreciated of these is graphite. Graphite gasket temperature range handles temperatures from -400°F to +875°F, provide excellent dimensional stability and resist chemical attack. On top of that, they have an additional advantage that's not obvious: they don't stick to flanges.
When replacing a gasket it's essential to clean flanges thoroughly. Many gasket materials stick to these flanges and have to be scraped off. That's a problem, for two reasons. First, there's a risk of scratching the faces while scraping, and that can create leak paths. Second, doing the job properly, (and avoiding early replacement,) takes time.
Do Graphite Gaskets Need Sealant?
Graphite gasket material sheets
These are the most common type as they are inexpensive and easily cut to size. These graphite gasket sheets don't require sealant and create an airtight seal when installed correctly.
Graphite gasket sealant
These can be used with graphite gasket material sheets or in applications where the graphite sheet cannot be used (such as aluminum). They provide a more robust seal than just a graphite sheet but will not work if there is no clinging area for them. It can also become brittle over time when exposed to UV light and heat.
Gaskets are a vital part of any modern machinery. They are used to keep two different surfaces from making contact and, thus, create a seal. There are many different types of gasket materials, each with its specific benefits and drawbacks.
What Is the Shelf Life of Graphite Gaskets?
The time from manufacturing to the point at which the quality/performance of the product becomes unacceptable is referred to as the shelf-life The product shelf-life is a ected by the composition of the product and the environment to which the product is exposed during manufacturing, distribution
and storage.
Gasket materials typically remain in storage for several months, sometimes years, before they are used. Their shelf life is an important piece of information for the user. Metallic, semi-metallic, graphite and PTFE materials are not greatly a ected by the storage time and, correctly stored, they can be kept on the shelf for over 10 years with no degradation. Some manufacturers even state an inde nite shelf-life for their products.
Although these products are not susceptible to poor storage conditions, it must be considered that excessive dust can settle on them and cause compatibility issues with the media being sealed. High humidity and moisture can also cause metallic components to oxidize and adhesives to lose their ability to stick over time. These materials are the easy ones, however for sheet jointing and cut gaskets which use elastomers bonded with bres as a base, it is a totally different story.
How Thick Is a Graphite Gasket?
|
Gasket Type |
Graphite gasket |
|
Sizes |
From 1/2″ up to 60″ |
|
Manufacturing Standards |
ASTM, EN, DIN, BS, GOST |
|
Thicknesses |
1mm, 1.5mm, 2mm, 3mm |
Our Factory
Beijing North Xinyuan Technology Co., Ltd. (formerly known as Beijing North Xinyuan Electrical Carbon Products Co., Ltd.) was established in 1993. After nearly 20 years of business development, it has successively established Beijing North Xinyuan Electrical Carbon Products Co., Ltd., Supply and Marketing Branch, and Science and Technology Development Branch. Formed today's North Xinyuan Electric Carbon Group. The company produces and operates various (Great Wall brand) graphite processing products and graphite materials. The company has the right to conduct self-operated import and export business and is a diversified outward oriented enterprise that is fully applicable to the WTO market.
Ultimate FAQ Guide to Graphite Gasket
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