Simple Guide to Choosing the Best Gaskets Materials

While they are low cost and appear to be simple, the value of choosing the best gasket material &#; such as expanded ptfe, vegetable fiber, or flexible graphite &#;cannot be understated. Even so, the custom gasket material is often not reviewed until there is gasket failure or if there is a high maintenance cost associated with servicing the gasket.

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In either case, the primary function of a custom gasket is to provide mechanical seals for a liquid or gas throughout the life of the application. The industrial gasket serves as a buffer and compensates for any imperfections between mating surfaces that need to be sealed.

Let's take a closer look at a few elements that should be addressed in choosing the best gasket material for mechanical seals and other applications.  

Temperature Considerations for Gasket Materials 

The starting point for choosing the best gasket material is typically temperature. Temperature considerations are critical because it can alter the physical characteristics of a material, including compression set, sealing properties, and maximum allowable stress. 

It's vital to consider both external and internal temperatures because gaskets in direct sunlight exposure can easily experience internal temperatures in excess of 140 degrees. 

On the other hand, exposure to an extremely cold flow or freezing temperatures can cause gaskets to become brittle or stiff, which can alter their physical properties and increase the chances of it failing.

Gaskets that experience cycling from warm to cold or vice versa in extreme applications can exhibit a higher compression set. As you can see, considering the temperature range is critical in choosing the best gaskets. It's imperative the material selected for gaskets can withstand exposure to the necessary range of temperatures.

UV & Ozone Considerations for Gasket Material

Ozone and UV exposure are both potential sources of rubber gasket degradation. It's also important to understand ozone doesn't just come from the atmosphere, but it can be created by electrical enclosures with high voltage electrical components. 

In either case, ozone and UV will break down the carbon bonds in the backbone polymers, which can result in hardening, drying, flaking, cracking, and scaling. Organic rubber gaskets like natural rubber, Buna-N (Nitrile), Buna-S(SBR), and synthetic isoprene will break down relatively quickly in exposure. However, EPDM and silicone are two materials that may be better equipped to resist UV in different applications.

Pressure Considerations for Gasket Materials

When a certain amount of pressure is exerted on a system, joints can begin to deform. As a result, it's vital for pressure to be considered when choosing the best gasket materials. Today, some of the gaskets have a P x T rating factor offering insight into the max limits of pressure and temperature combined. 

Electromagnetic Interference (EMI) Considerations for Gasket Materials

Manufacturers of aerospace, automotive, consumer, and industrial electronics are required to meet Federal (EMI) product standards. EMI is emitted by components as well as internal wires and can function like emitting antennas. 

For EMI radiation to be controlled, electronic components must be completely encased in a conductive enclosure, and it's vital the enclosure and lid have complete contact.

As a result, a viable conductive gasket is necessary. In addition to EMI attenuation, these gaskets may also function as environmental sealing. 

Media Considerations for Gasket Materials

Undoubtedly, the media the gasket will be exposed to is a critical consideration. In general, gas will be more difficult to seal than a liquid. After the material with an acceptable temperature/pressure range has been identified, the next step is to consider whether it will be compatible with the media being sealed. 

Chemicals can impact the functional properties and structural integrity of the material. And the chemical resistance of the gasket material is critical because the other properties of the gasket material would be irrelevant. 

You should also consider the effect temperature will have on its chemical resistance. For instance, many fluids can be more aggressive in certain temperatures. As a result, gaskets used to seal fluids at an ambient temperature may not perform the same at higher temperatures.

Common Gasket Materials & Key Characteristics

Now we've covered a few of the top considerations for choosing the best gasket materials, let's look at a few common materials and their characteristics. At Frank Lowe, we offer most of our gasket materials on a roll or on a sheet based on the unique needs of your application.

Non-Asbestos Types of Gaskets

Non-asbestos types of gaskets are created from a compressed fiber material and a binding elastomer. Non-asbestos types of gaskets are used across many different applications, involving water, oil, acid, and steam.

Cork Gasket Materials 

Cork gasket materials are very stable, lightweight materials with the ability to resist water penetration.

Key Benefits of Cork Material for Gaskets

It boasts outstanding compressibility, high resistance to oil, solvents, and no lateral flow. Cork is unaffected by extreme temperatures and is resistant to wear. At Frank Lowe, we offer cork materials on a sheet as well as on rolls.

Cork-n-Rubber Gasket Materials

Cork-n-rubber materials are a combination of synthetic rubber polymers and granulated cork.

Key Benefits of Cork-n-Rubber Materials

This offers high flexibility and resilience of rubber with the compressibility of cork. In addition, the rubber boasts the ability to provide chemical compatibility and act as a seal while helping resist weather conditions, acids, and fungus. 

You can choose from a range of different rubber materials to best meet the chemical resistance needs of the gasket. You can also opt for cork-n-rubber die cut on a sheet or on a roll based on your needs.  

Silicone Gasket Materials

Silicone gaskets are offered as foam, sponge, or as a solid. In either case, the characteristics can include general inertness, high-temperature stability, and resilience.

Key Benefits of Silicone Gasket Material

Silicone offers a number of benefits, including: 

Buying high-quality seals: Kofler - Dichtungen

Would you like to purchase a high-quality seal characterized by long durability and optimal product features? In our extensive range, you are guaranteed to find what you are looking for. We operate internationally as both a manufacturer and a distributor of seals. Our quality products are shipped from our headquarters in Tyrol, Austria, to the whole world. Our product range extends from standardized O-rings to custom-made special seals and made-to-measure seals for your specific applications &#; get in contact with us!

Over the course of our long-standing activity, we have continuously improved our offerings while always keeping in mind the high demands of our customers from industry and commerce. The portfolio available with us includes numerous variants of seals, ranging from flat gaskets and hydraulic seals to O-rings and shaft seals (rotary seals) to complete seal sets. We are also your competent contact point for individual manufacturing requests.

Also, see our knowledge section on seal technology, where you can find important information about sealing technology.

Dingtong are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

Buying the right Seal &#; In the Kofler Shop

We have made it our mission to meet every customer request with expertise, efficiency, and professionalism. Whether you need standard O-rings and rubber seals or want to have custom seal sets made for demanding and complex conditions &#; we ensure that you receive exactly the seals that best meet your needs.

We also offer large and hydraulic seals as well as special versions in high quality. You can purchase seals from us in various sizes and made of different materials. Our product selection includes versions made of polyurethane, Viton, or special sealing materials like PEEK. We also offer seals made of Teflon or those that can withstand high temperatures, upon request.

Buying Seals &#; Benefit from a great selection of profiles and models

Our product variants not only offer a high variety in terms of material, but you will also find every type of profile used in industry or commerce in our shop. You can purchase seals with an inner diameter from one millimeter to variations that have an outer diameter of 2,500 millimeters. In manufacturing our diverse products, we utilize our extensive know-how, which has been developed through years of experience.

Moreover, we aim to carry every type of seal in our shop while offering durable products and top performance. Thanks to a comprehensive inventory of trade goods&#;which houses shaft seals, piston seals, flat gaskets, lip and groove rings, dirt wipers, O-rings, piston seals, and many other products in quantities of several thousand&#;we ensure that we can deliver large orders promptly and efficiently and respond flexibly to customer requirements. Therefore, it is worthwhile to buy seals from us.

We Support You in Selecting Your Seal in Our Shop

In our operations, we place the highest value on good and collaborative customer relationships. Part of our quality understanding is to know your needs precisely and to offer you exactly the right products. Flexibility and speed are also among our self-imposed standards. To always provide you with the correct products, we work with various materials in our seal production across a temperature range from -260°C to 1,000°C (-436°F to °F). We manufacture our items from a wide variety of raw materials. Processing special materials such as Kalrez, Aflas, or PEEK, as well as the production of metallic mechanical seals, shaped and milled parts, are also part of our performance portfolio.

Application Areas and Uses &#; Custom-Made Seals

In developing custom-made seals to meet our customers' specific requirements, we set particularly high standards for ourselves. Our main goal is to provide you with durable products that have the best material properties, enabling smooth workflows, a generally longer lifespan for machines, and extended maintenance intervals. Good planning is the starting point of our activities because it is essential for high-quality and requirement-compliant goods.

We analyze your needs in advance and then select the optimal raw material or semifinished product. The processing is carried out by a competent CNC professional. Only after strict final inspection, which takes place in our quality assurance, do we send the product on its way to you. As we possess extensive expertise and stock a large number of items, we can easily handle even short-notice requests. Is your production machine down, or is a seal needed for an excavator on a construction site, and you want to keep downtime as low as possible?

Find the right seal and gasket in Kofler&#;s Shop

In our manufacturing, moldless processes are standard, allowing us to produce seals with a wide range of diameters based on the requirements and applications. Our large material warehouse is stocked with an extensive amount of raw materials and profiles. In close coordination with our customers, we select the appropriate products and raw materials from which we manufacture their seals.

Our trade warehouse consistently holds between 20,000 and 30,000 dimensions of O-rings and shaft seals, which are stored in various versions. Other products in stock include seal kits, large seals and flat gaskets, and many other goods in standard sizes that we can flexibly access. The Kofler range is rounded off with support rings, rod seals, piston seals, guide rings, and bands, to name a few additional items. From standard profiles to seal kits, from special seals to vulcanized molded parts &#; you will receive the right workpiece with us. We also provide spare part assortments, which are usually indispensable in maintenance and service. These service boxes save you trips and time, thus enabling you to operate economically.

Buy Seals and Utilize Comprehensive Service

For all customers who need their new seal as quickly as possible: We can deliver directly to your factory or construction site. In addition, we provide you with diverse and useful information about the use, storage, and installation of our seals. We give you technical advice on how to properly perform tasks such as venting cylinders or installing and storing seals.

Years of Experience Pay Off: Buy Seals from the Experts

You buy seals from us in the exact specification that is best suited for your requirements and workflow. Our company has been operating in the market with high flexibility and the highest standards of quality since . Do you need support in selecting products and require expert advice from our staff? Contact us &#; we are happy to help you find the right seal and answer all your questions comprehensively and competently.

Standard Seals and Custom-Made Special Seals - We Are Experts

At Kofler - Dichtungen, we specialize in manufacturing high-quality seals and the international distribution of merchandise, standard seals, and custom-made special seals. Thanks to our own seal production and our extensive merchandise warehouse, we are absolutely flexible and offer you a wide and deep range of seals.

Seal Supplier and Manufacturer

Seal technology in the industry - whether it's pneumatic seals, hydraulic seals, standard seals, or custom-made special seals, we are your expert. As a seal supplier and manufacturer, we have been successfully active for many years in the following areas and industries:

• Seals for industry
• Special and standard seals for mechanical engineering
• Seal rubber and special seals for the construction industry
• Seals for the wood industry
• Special and standard seals in vehicle construction
• Seals for transportation
• Seals for agricultural and municipal technology
• Seals in the field of energy technology
• Large seals and special seals for mining and tunnel construction

We fulfill every customer request, whether it's O-rings or a rubber seal in standard execution, individual seal sets for demanding conditions, large seals, hydraulic seals, or individual special seals. We offer standard seals in various materials and sizes.

Custom-Made Special Seals - Custom Fabrication of Seals According to Customer Wishes

Custom-made special seals from our own seal production in Austria. Thanks to moldless production processes (such as water jet cutting technology), we can manufacture seals with an inner diameter of 1 mm (0,039 in) up to large seals with an outer diameter of 2,500 mm (98,42 in).

From our extensive material warehouse, we select the appropriate raw material and the respective profile in consultation with the customer, depending on the application area of the seals. This allows us to respond quickly and flexibly to the needs of each individual customer.

Special Seals from Different Materials

To be able to supply the right product for every need and application, our seal production offers different materials in a temperature range from -260 °C to 1,000 °C (-436°F to °F).

These include:

• Seals made of polyurethane
• Custom seals made of NBR
• Special seals made of EPDM
• Standard seals made of silicone
• Custom-made special seals made of Viton
• Seals made of PTFE (pure and filled)

We also manufacture seals from high-temperature NBR, low-temperature PU, and Viton, PU, and EPDM with FDA certification.

On request, we are also happy to process special materials such as PEEK, Kalrez, Aflas, etc. Products such as springs, molded parts, milled parts, and metallic mechanical seals perfectly round off our assortment. See for yourself and put us to the test with your inquiry!

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