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What is a Rubber Gasket? What to Consider while Selecting Rubber Gaskets?

A gasket is a seal that is made of rubber, plastic, or other synthetic material. They are used to seal or protect openings in equipment such as boilers, air conditioners, furnaces, and water heaters. Gaskets are typically installed on the outside of the equipment, but they can also be installed on the inside.

Rubber gaskets are flexible components used to mechanically seal a microscopic gap between two mating surfaces or joints. Such surfaces are, for example, flanged surfaces of pipes and joints, connecting surfaces of the car cylinder head and engine block, tank edge and cover, door edges, door frames, etc. Rubber gaskets seal surfaces by flowing in and filling surface irregularities of rigid parts. The sealing effect is created by parts that apply compressive forces that make the sealing plastic. Natural or synthetic rubbers belong to a family of materials called elastomers. Elastomers are a class of highly elastic polymers created by linking long polymer chains into amorphous structures. The intermolecular forces between polymer chains are relatively weak. This allows them to reconfigure under stress. Thanks to this property, elastomeric seals easily adapt to the profile of surfaces and form a tight seal.

Here are the factors to consider to choose the right rubber gasket.

Application of Rubber Gasket

The application includes considering when selecting a rubber gasket include hazards, whether the gasket’s support is required continuously or intermittently, whether the application is standard or heavy maintenance, and whether the hardware or joint is sealed (including the type, number, and size of mounting, bolts required), and any regulations. The requirements of every specific application are different, and there is no single gasket material that will successfully serve all applications. Choosing the right material is critical to ensure that the gasket is not damaged during service and that it will function as an effective seal throughout its expected life.

Environmental Factors

A number of environmental factors can affect the longevity of the seal. In addition to the temperature, the following four factors are critical to the success or failure of a seal:

UV radiation: Exposure to UV radiation can be damaging to the gasket.

Moisture Resistance: Materials can degrade when exposed to moisture, causing failure.

Chemical Resistance: Acidic, corrosive, toxic, or abrasive chemicals will affect the integrity of the gasket or seal.

BSR and NVH damping: Vibration can damage sensitive parts, causing product failure and annoying noise.

Testing the chemical resistance of the gasket against the corrosive properties of the liquid it works with is essential. Some can withstand oil, but should not be used with oxygenating fluids. ePTFE is excellent for all applications in the pH range of 0-1, but cannot tolerate molten alkali metals or certain elements. When looking for a sealant, make sure you know what fluid you’re dealing with.

Temperature

Consider the temperature that the rubber seal will encounter in the application along with time as a key factor. The amount of time the gasket is exposed to the highest possible temperature is the key to its longevity. As the temperature of the application increases, the choice of appropriate sealing materials becomes more limited. Specifically, if the operating temperature approaches the maximum continuous operating temperature recommended for a given material,  an alternative material must be considered. Therefore, the continuous maximum operating temperature is a more important and useful parameter than simply knowing the maximum temperature.

Pressure

The ability of the gasket material to resist the pressures that can occur in an application is different, the maximum pressure of the gasket must be known. As with temperature, the selection of suitable materials narrows as the applied pressure increases. In addition, pressures within an application may not be constant, and seal material pressure may change due to process cycling. An expert gasket supplier can provide guidance on selecting the best material based on the operating pressures that may occur in the application. Since temperature and pressure are closely related in an application, the product of the application’s maximum pressure and temperature (PxT value) can be useful in material selection. If the PxT value of the sealing material you are considering is close to the PxT value of your application, you should consider using a more durable material.

Cost

The purchase price of the gasket is only one part of the total costs incurred during its life cycle. In addition to purchasing costs, other costs including installation, inspection and maintenance costs, downtime, and disposal should be considered as related costs. Since the purchase price is only one part of the total life cycle cost of the package, an initially cheaper but more frequently replaced package may be more expensive in the long run. Therefore, when choosing gaskets, the entire life cycle costs must be considered, not just the purchase costs.

Harkesh Rubber’s sealing solutions are precisely calibrated with high-quality material and torque-reducing designs. Our gaskets have a high-pressing action that results in excellent sealing all while operating with just the required amount of force. Get in touch with our industry experts to learn more.

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A Gasket or An O-ring? Which one do you need?

O-rings and gaskets go hand in hand. The two terms are used interchangeably when discussing car parts, but they are actually two different things. These components are nearly identical, with only a few key differences. They are used in different applications and have different properties. They are commonly confused with one another. O-rings are used to create a seal when metal surfaces are joined together. Gaskets, on the other hand, can be used to create a seal between two different types of materials, such as metal and plastic. They are used to prevent leaking, help keep the car cool, and prevent overheating. This article will discuss the difference between O-rings and gaskets and identify when to use each type of sealant.

What is an O-ring?

O-rings are made out of rubber and are used to seal a variety of places where a gasket might be required. O-rings are small, flexible, and have a smooth surface. O-rings are usually used to seal the inside of a pipe. O-rings are not typically used to seal holes in other types of materials. O-rings are often used in the automotive industry, where they are used to seal the ends of the tubing. O-rings can also be used in other industries, such as the petroleum industry. An O-ring is precisely designed to fit profiles that are specific to meet the needs of a channel or groove. The O-ring profiles can be of different shapes and polymers used. In certain compact situations, infinite formulas can be constructed. Common applications that require O-rings include: ●     Hydraulics ●     Fuel Systems ●     Medical and Pharmaceutical ●     HVAC ●     Oil ●     Pipefittings

What is a gasket?

O-rings are often used in the automotive industry, while gaskets are used in the aerospace industry. Gaskets are used to seal a gap between two surfaces. O-rings are typically used in situations where the gap is small and there is a need for a seal. Gaskets are typically made out of rubber, while O-rings are made out of a variety of materials.

Any material can be used to make gaskets. Certain gaskets can be elastomeric. However, others are made of a harder material such as metal. For example, most car engines have a metal head gasket that sits between the cylinder head and the engine block. O-rings are simply circular and contrary to this gaskets come in different shapes. Gaskets are designed to accommodate the complex shape of the surface that they fit.  A mating surface may have four or more components, and it is only fair to use a custom shaped gasket over a simple O-ring.

What are the differences between O-rings and gaskets?

O-rings are rubber rings that seal the joint between two surfaces. Gaskets are rubber rings that seal the joint between two surfaces and are used in a variety of applications, such as in a car engine. Gaskets are used to seal the joint between a cylinder and a piston. Gaskets are made of a material that is flexible, elastic, and non-reactive to heat and pressure, while o-rings are made of a material that is more rigid and will deform under pressure. O-rings are more commonly used in applications where a seal is required to maintain a gas-tight seal, such as in a vacuum. O-rings have a rounded edge at the top and a flat bottom while gaskets have a flat top and a rounded bottom. Gaskets are often used in applications that require a seal, while o-rings are used in applications that do not require a seal. The O-ring is typically a softer, more pliable material than the gasket. O-rings are often used in applications that require a seal, while gaskets are used in applications that do not require a seal. O-rings are typically a softer, more pliable material than the gasket. O-rings are often used in applications that require a seal, while gaskets are used in applications that do not require a seal.

Harkesh Rubber’s sealing solutions are tested regularly to ensure safety and durability. Harkesh Rubber’s O-rings and Gaskets have been fine tuned carefully to meet your needs and industry standards. Our industry experts are available to you for guidance. Get in touch with us to learn more.

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How do Butterfly Valves Work?

Butterfly valves have been uniquely designed to perform three functions: start, stop, and control the flow. The butterfly valve’s distinct design has utility and efficiency at its core. The butterfly valve gained popularity in the 1950s, although the first prototype was designed as early as the 18th century. The butterfly valve has found uses in various industrial applications. The oil and petroleum industry once heavily relied on the butterfly value, contributing to its popularity.

The butterfly valve has a simple assembly that can be constructed with handles, manual gears, and pneumatic actuation. The stem and disc configuration turns 90° in the clockwise direction to open and close. The butterfly valve has gained the approval of the masses because of its cost-effective maintenance, lightweight, efficiency, and speed. The basic configuration of any butterfly valve is a stem, disc, seat, and seal.

How does the Butterfly Valve work?

The butterfly valve’s configuration is rather simple compared to the ball, globe, or gate valves. It is advantageous as it occupies smaller space, weighs less, and is easier to install. The butterfly valve consists of a body, disc, seat, and seal. Each of these parts plays a crucial role.

The interiors of the butterfly valve are safeguarded by the body. The seat performs the integral function of sealing together with the disc. It covers the entirety of the inner walls of the valve, and to increase its efficiency, it is either made of metal or elastomeric materials. When the valve closes, the disc sits comfortably on the seat. The disc works with the seat to seal off the flow of the media while the butterfly valve is isolated. The disc has the provision to move partially to make way for a certain amount of the media to flow. The disc is connected to the lever by the stem. The mechanism is put into motion via the stem when the lever is turned.

The mechanism of the butterfly valve requires the lever to be quarter-turned. With this movement, the disc inside turns accordingly depending on the extent to which the lever has been turned. If turned completely, the disc’s position is parallel to the flow, allowing the media to pass at full force. The disc is brought back to its perpendicular position when the valve is closed. It sits on the seat, sealing off the passage completely.

The butterfly valve can be operated manually and alternatively operated pneumatically or electronically. When done pneumatically, the piston that has been employed bears the load of opening the valve by providing the required air pressure. This mechanism has the approval of Chinese manufacturers due to its speed and efficiency. The butterfly valve can be worked electronically with the help of a remotely operated gearbox that turns the stem, which in turn moves the disc when a signal is received.

The Butterfly Valve Seal

The butterfly seals are primarily used as cut-offs and regulating fittings in several applications at high temperatures. The previously mentioned extreme conditions beg the need for absolute internal sealing of the disc. The seal should remain impervious to wear because of the conditions while being flexible. The butterfly seal is an integral part of the butterfly valve that requires careful consideration as it can block three leakage paths – the flanges, the sealing of pipes, and the operating shafts. The design and materials have to be configured according to the application, as there is no room for mistakes with the butterfly valve seal.

Butterfly valve seals play an integral role in the beverage and pharmaceutical industries. The butterfly valve seals made of EPDM are mainly used in the beverage industry as it is known for being capable of withstanding aqueous media, acids, and CIP/SIP processes. The dairy operations work best with FKM, VMQ, and HNBR because of the presence of high-fat content. The pharmaceutical industry is heavily dependent on Fluoroprene XP as the material is resistant to the intense production process.

Harkesh Rubber’s sealing solutions are precisely calibrated with high-quality material and torque-reducing designs. Our butterfly seals have a high pressing action that results in excellent sealing, all while operating with just the required amount of force. Get in touch with our industry experts to learn more.

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Flawless Precision with Cryogenic Deflashing in Rubber Molding

In the world of rubber molding, achieving high precision and flawless finishes is crucial for performance-driven industries like automotive, aerospace, medical, and industrial applications. One of the most efficient and advanced techniques for removing excess flash from rubber components is cryogenic deflashing process. This process ensures precision rubber molding, consistency, and efficiency, making it an ideal choice for industries seeking superior results.

What is Cryogenic Deflashing?

Cryogenic deflashing is an advanced rubber deflashing process that removes excess material, known as a flash from rubber-molded parts by using liquid nitrogen, without affecting the integrity of the parts.

Process Overview:

Loading: Rubber molded parts are placed in a highly insulated chamber of a cryogenic deflashing machine.

Cryogenic Cooling: The rubber molded parts are exposed to cryogenic substance, typically liquid nitrogen, which cools them below glass transition temperature making it brittle and easy to remove.

Deflashing: Once the desired temperature is reached, the parts are tumbled and blasted with non-abrassive polycarbonate media, which removes the unwanted flashes without affecting the integrity or surface finish, leaving a high quality, flashless rubber molded parts.

Post-Processing: After deflashing, a post-tumbled process is employed to remove any residual media from the parts. The parts are then allowed to return to ambient temperature.

Why Cryogenic Deflashing?

Precision: Ensures clean and accurate rubber molding by removing flash without damaging the parts.

Efficiency and Consistency: As a batch process, it processes large quantities quickly, ensuring uniform finishing across all parts.

Eco-friendly: Reduces material wastage and eliminates chemical treatments

Industries That Benefit from Cryogenic Deflashing

This cutting-edge rubber deflashing process is widely used across various sectors, including automotive, aerospace, medical, electronics, and many other industrial applications.

As industries continue to demand higher precision and efficiency, cryogenic deflashing sets a new benchmark in the rubber molding industry. Our manufacturing facility is equipped with advanced cryogenic deflashing machine, enabling us to deliver high-quality, consistent results across various applications.

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Why Import Rubber Gaskets from India?

India has long established itself as a global leader in manufacturing, and rubber gaskets being one of its singular products.

Here’s why sourcing rubber gaskets from Indian manufacturers like Harkesh Rubber is a smart decision for businesses worldwide:

1. Competitive Pricing Without Compromising Quality

Indian manufacturers, like Harkesh Rubber, leverage cost-effective production processes to offer high-quality rubber gaskets at competitive prices.

Low labor costs and efficient supply chain management results in significant savings for international buyers.

Competitive pricing does not compromise quality—Indian manufacturers adhere to global standards, ensuring that their products deliver exceptional durability and reliability.

2. Exceptional Quality Standards

Indian rubber gasket manufacturers use premium-grade materials such as EPDM, silicone, nitrile, and Viton to cater to various industrial needs.

Products often undergo rigorous testing to meet international certifications like ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, IATF F16949:2016, TUV CERTIFIED COMPANY, ensuring performance across demanding applications.

Harkesh Rubber prioritizes precision and durability, making its gaskets suitable for industries like oil and gas, automotive, aerospace and military, pharmaceuticals and others.

3. Customization and Innovation

Indian manufacturers offer customized solutions, adapting rubber gaskets to specific client requirements that include dimensions, shapes, and material grades.

Harkesh Rubber specializes in large-sized components and customized gaskets like O-rings, that ensure a perfect fit for diverse machinery and equipment, showcasing a commitment to innovation.

4. Reliability and Supply Chain Efficiency

Indian rubber gasket manufacturers like Harkesh Rubber guarantee on-time delivery, even for bulk orders, by leveraging well-established logistics networks.

Buyers also benefit from seamless communication, making the entire import process smooth and hassle-free.

5. Aligned with the ‘Make In India’ Vision

India’s ‘Make in India’ initiative promotes high-quality manufacturing that competes on a global scale, ensuring sustainability and economic growth.

By choosing Indian-made rubber gaskets, international businesses can contribute to ethical production practices and support the transformative spirit of this campaign.

6. Eco-Friendly Practices

Indian manufacturers are moving towards sustainable production methods by utilizing eco-friendly materials and reducing waste.

This commitment supports the global effort to lower carbon footprints across major industrial supply chains.

7. Trusted Partner in the Global Market

Indian rubber gasket suppliers have built a strong reputation for reliability, quality, and transparency.

Long- partnerships with international clients demonstrate trust and confidence in Indian-made products.

Conclusion

Importing rubber gaskets from India offers unparalleled benefits in cost, quality, and reliability. With manufacturers like Harkesh Rubber at the forefront, global businesses access superior products that combine precision engineering with affordability, all while embracing the spirit of ‘Make In India, Make For The World’.

Expand your operations by partnering with trusted Indian rubber gaskets manufacturers and suppliers today!

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A Comprehensive Guide to Choosing the Right Custom Sealing Manufacturer in India

The efficiency and reliability of industrial products are often based on the quality of seals used. That’s why companies from diverse sectors such as automotive, aerospace, pharmaceuticals, and many more choose Harkesh Rubber for their custom sealing needs. In this article, we will explore key considerations that can guide you in making an informed choice while choosing quality seals:

Material Options: Different applications require varied materials, and a reputable manufacturer should offer a wide range to meet varying needs. Each material has unique properties, such as resistance to heat, chemicals, abrasion, and flexibility.

At Harkesh Rubber, for example, we offer quality seals made of HNBR, NBR, FKM, Silicone, EPDM, and Neoprene. Our seals are versatile and cost-effective, making them suitable for a broad range of applications.

Customisation Capabilities: Look for manufacturers with robust customisation capabilities. This includes designing seals to fit unique shapes, sizes, and specifications. At Harkesh Rubber, we have experienced engineers who can collaborate with you to understand your application’s intricacies and offer solutions that enhance performance and longevity.

In addition to custom shapes and sizes, we also provide specialised features such as colour coding, branding, or unique markings. Customisation extends beyond the physical attributes of the seal to packaging and labelling, ensuring a seamless integration into your production process.

Quality Assurance and Certifications: Reputable custom sealing manufacturers adhere to stringent quality control measures and hold relevant industry certifications. These certifications serve as indicators of a manufacturer’s commitment to producing high-quality products that meet or exceed industry standards. Harkesh Rubber has ISO 9001-2015 certification, a globally recognised standard for quality management systems, ensuring consistency and traceability in manufacturing processes.

Supply Chain and Lead Times: Evaluate the custom sealing manufacturer’s supply chain capabilities. Harkesh Rubber has reliable sources for raw materials and can maintain consistent production levels. We offer short lead times and a reliable supply chain that can contribute significantly to minimizing downtime in your production process.

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Understanding FKM Seals and Their Wide Range of Applications

When it comes to industrial sealing solutions, FKM seals from Harkesh Rubber stand out as one of the most reliable and durable options available. FKM, also known as Fluoroelastomer, is a high-performance material used in various industries to create seals that can withstand extreme conditions. These seals are often chosen for applications requiring high heat, chemicals, and oil resistance, making them invaluable in sectors like automotive, aerospace, and chemical processing.

The unique composition of FKM seals from Harkesh Rubber allows them to function effectively in temperatures ranging from -20°C to 205°C, with some special grades capable of even greater ranges. These seals are designed to resist degradation from a variety of aggressive chemicals such as hydrocarbons, oils, and gases, which can cause other types of seals to deteriorate quickly.

One of the most common uses of FKM seals is in automotive engines, where they provide excellent sealing under high temperatures and exposure to oils and fuels. Additionally, industries like petrochemical processing rely on Harkesh Rubber's FKM seals to prevent leaks and contamination in pipelines and machinery.

Whether you want to enhance your machinery's performance or ensure long-lasting protection in harsh environments, Harkesh Rubber's FKM seals offer a versatile and robust solution. Their superior chemical resistance and durability are key components in numerous industrial applications.

Read more…

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Cryogenic Deflashing

This is the only method that makes it possible to eradicate complex flash at the inner dimensions. Parts with a thin flash can be removed quickly through cryogenic deflashin. The traditional deflashing methods generally deliver a poor deflashing effect as it is done manually with the help of blades, scissors, or knives. The manual trimming method has a high variability in quality and the production rate due to the geometry of the parts. Since the finish quality is not up to the mark, it leads to high rejection rates. Unevenly deflated products when used can affect and damage the machine it is used in.

The Process of Cryogenic Deflashing

Cryogenic Deflashing is a combination of rapid rotation, nitrogen and plastic blast media is used to get rid of the flash in an extremely precise and economical way. The rubber parts are arranged in a perforated container which is then inserted in a blast enclosure.

The containers rotate and evenly expose all sides towards the blast media. The enclosure is insulated with firm polyurethane foam for stable temperatures. The liquid nitrogen decreases the temperature inside and freezes the flashing to make it fragile.

Advantages of Cryogenic Deflashing

Cryogenic deflashing offers numerous advantages over other traditional or manual deflashing methods:

● This process maintains an element of integrity and precision and ensures greater productivity.

● Due to this using a batch process, the cost of per piece is lesser as the number of parts processed in a specific time increases. This makes the manufacturing process economical and cost-efficient.

● Repairing or replacing a mould rises up the expenses bracket. In this method, the moulds can bede-flashed which extends their durability.

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Enhancing Your Supply Chain with a Trusted Rubber Seal Supplier in India

In today's competitive manufacturing landscape, finding a reliable rubber seal supplier in India can significantly bolster your supply chain efficiency. At Harkesh Rubber, we understand the critical role that quality seals play in ensuring product integrity and performance. As a leading manufacturer and exporter of rubber seals, we take pride in offering a diverse range of products that cater to various industrial needs worldwide.

Our extensive catalog includes high-quality wire seals, designed to meet stringent international standards. If you're looking for durable and cost-effective wire seals, look no further than our comprehensive selection at Harkesh Rubber, your trusted rubber seal supplier in India. Whether you're in automotive, electronics, or any other industry requiring reliable sealing solutions, our products are crafted to deliver exceptional performance under demanding conditions.

Why Choose Harkesh Rubber as Your Rubber Seal Supplier?

Quality Assurance: We adhere to strict quality control measures throughout the manufacturing process to ensure each product meets the highest standards.

Customization Options: Tailored to your specific requirements, our rubber seals can be customized in terms of size, material, and performance characteristics.

Competitive Pricing: We offer competitive pricing without compromising on the quality of our products, making us a cost-effective choice for businesses of all sizes.

Global Reach: With a strong presence in the international market, including the USA, we have the capability to fulfill orders promptly and efficiently.

The Harkesh Advantage

With decades of experience in the industry, Harkesh Rubber has earned a reputation for reliability and excellence. Our commitment to innovation and customer satisfaction drives us to continually enhance our product offerings and services. Whether you require standard off-the-shelf seals or bespoke solutions, we are dedicated to meeting your needs with precision and professionalism.

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Leading Rubber Diaphragm Manufacturers in India: A Global Perspective

In the competitive landscape of industrial products, finding reliable rubber diaphragm manufacturers in India is crucial. At Harkesh Rubber, we stand out as pioneers in the industry, providing high-quality diaphragms that meet global standards. If you're looking for dependable manufacturing solutions, visit our website for more information.

Understanding Rubber Diaphragms

A rubber diaphragm serves as a critical component in various applications, including automotive, aerospace, and industrial machinery. Its flexibility, durability, and precise engineering make it indispensable across diverse sectors. Harkesh Rubber has honed its expertise over 35+ years, catering to the stringent demands of clients worldwide.

Why Choose Harkesh Rubber?

Our commitment to quality and innovation sets us apart from other manufacturers. We leverage state-of-the-art technology and adhere to international quality standards to deliver products that exceed expectations. Whether you require custom designs or large-scale production, our team ensures seamless execution and timely delivery.

Global Presence and Client Satisfaction

While based in India, our reach extends globally, including the USA market. We have built a reputation for reliability and excellence, earning the trust of clients worldwide. Our customer-centric approach and unwavering commitment to quality have established us as leaders in the industry.

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Harkesh Rubber Aims To Supply HNBR-Based Rubber Sealing Solutions In The USA

Harkesh Rubber specializes in providing HNBR to markets with limited accessibility. If you have a requirement for HNBR, we will be able to fulfil it promptly. A substantial 73% of our clientele comprises American businesses. Our revenue stream is derived from exports, with 74% directed towards North America and Europe.

Notably, our collaborative efforts have resulted in an average reduction of 47% in procurement costs and a 43% decrease in lead times for our clients. Prior to the onset of the Covid-19 pandemic, our on-time delivery rate averaged 72%; post-Covid, this figure has risen significantly to 92%.

Our HNBR products are renowned for the following characteristics:

High chemical Resistance: They offer exceptional resistance to a wide range of chemicals. This makes them ideal for applications where exposure to corrosive substances is a concern.

High-Temperature Stability: With a capacity to withstand elevated temperatures, our HNBR seals maintain their integrity and functionality, ensuring reliable performance in demanding and high-temperature environments.

Enhanced Durability: HNBR exhibits excellent wear resistance, contributing to the longevity of rubber sealing solutions. This durability translates to extended service life and reduced replacement frequency.

Oil and Fuel Resistance: HNBR is inherently resistant to oils and fuels, making it a preferred choice for applications where exposure to petroleum-based substances is common. This property ensures the integrity of seals in such environments.

Sealing Precision: They provide precise and effective sealing, creating a tight barrier against leaks. This characteristic is crucial in preventing fluid or gas escape, maintaining system efficiency, and preventing contamination in various industrial applications.

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Was ist eine Viton® (FKM)-Dichtung und welche Anwendungen gibt es?

Viele der anspruchsvollsten Dichtungsanwendungen erfordern eine Hochleistungsdichtung, die auch unter härtesten Bedingungen außergewöhnlich gut funktioniert. Solche Anwendungen erfordern häufig Dichtungen aus einer Familie von Fluorelastomeren namens FKM. Während Viton® der generische Name für FKM ist, ist es ein Markenname von DuPont für seinen synthetischen Kautschuk und sein Fluorpolymerelastomer.

Was genau ist FKM?

Die FKM-Elastomerfamilie besteht aus Copolymeren oder Terpolymeren von Tetrafluorethylen (TFE), Vinylidenfluorid (VDF) und Hexafluorpropylen (HFP), Hexafluorpropylen (HFP) und Vinylidenfluorid (VDF oder VF2) und Perfluormethylvinylether (PMVE). Da DuPont das erste Unternehmen war, das dieses Material auf den Markt brachte, ist sein Markenname Viton® der am häufigsten mit FKM in Verbindung gebrachte Name.

Die meisten synthetischen Kautschuke bestehen aus langen Ketten von Kohlenstoff- und Wasserstoffatomen. Diese Gummis neigen bei Kontakt mit Öl zum Aufquellen und haben einen begrenzten Temperaturbereich. Darüber hinaus zersetzen sie sich mit der Zeit bei UV-Bestrahlung (durch Sonnenlicht).

Wenn Fluor zu synthetischen Gummis hinzugefügt wird, bindet es sich fest an die Kohlenstoffatome und macht die Verbindung widerstandsfähiger gegenüber anderen Verbindungen, während es gleichzeitig enorme Flexibilität bietet. Dies verändert die Eigenschaften des Materials und macht FKM zu der Hochleistungsgummiverbindung, die für viele Anwendungen entscheidend ist.

FKM ist bekannt für seine hervorragende Beständigkeit gegen Hitze, Chemikalien, konzentrierte Säuren, Öle und aggressive Kraftstoffe.

Materialqualitäten für Viton®-Dichtungen

Auf der Grundlage der Materialzusammensetzung und der Anwendungen gibt es FKM in einer Reihe verschiedener Materialqualitäten. Einige davon sind:

Allgemeine Verwendungsqualitäten:

Viton® A

Viton® A-Dipolymere werden aus zwei Monomeren polymerisiert — Vinylidenfluorid (VF2) und Hexafluorpropylen (HFP). Es ist das am häufigsten verwendete Viton®-Dichtungsmaterial und wird als Gummidichtung für Schmier- und Kraftstoffe in der Luft- und Raumfahrt sowie im Automobilbereich verwendet.

Viton® B

Viton® B ist ein Terpolymer, d. h. polymerisiert aus drei Monomeren — Vinyliden (VF2), Hexafluorpropylen (HFP) und Tetrafluorethylen (TFE). Dieses Material wird hauptsächlich in der chemischen Verarbeitung, der Energieindustrie und in der Versorgungswirtschaft verwendet.

Viton® F

Viton® F ist ebenfalls ein Terpolymer, polymerisiert aus drei Monomeren — Vinylfluorid (VF2), Hexafluorpropylen (HFP) und Tetrafluorethylen (TFE). F-Typen bieten von allen anderen Viton®-Typen die beste Flüssigkeitsbeständigkeit. Sie sind äußerst nützlich in Anwendungen, die Beständigkeit gegen Kraftstoffpermeation erfordern.

Hochleistungsqualitäten:

Viton® GB und GBL

Viton GB und GBL sind Fluorelastomer-Terpolymere, die aus drei Monomeren polymerisiert sind — Vinylfluorid (VF2), Hexafluorpropylen (HFP) und Tetrafluorethylen (TFE). Diese Fluorelastomere verwenden eine Peroxidhärtungschemie, die zu einer überlegenen Beständigkeit gegen Säure, Dampf und aggressive Motoröle führt.

Viton® GLT

Dieses Fluorelastomer wurde speziell entwickelt, um die hohe Hitze- und Chemikalienbeständigkeit der allgemein verwendbaren Viton®-Typen beizubehalten und gleichzeitig die Flexibilität bei niedrigen Temperaturen zu verbessern. Außerdem bietet Viton® GLT eine um 8 bis 12 °C niedrigere Glasübergangstemperatur, was auf eine Leistung bei niedrigen Temperaturen in Elastomeranwendungen hinweist.

Wichtige Eigenschaften einer Viton®-Dichtung

Wenn es um Dichtungsmaterialien geht, ist eine gute Druckverformungsbeständigkeit oder die Fähigkeit zum Zurückfedern nach Entlastung erforderlich. Weitere wünschenswerte Eigenschaften sind ein breiter Temperaturbereich und eine gute Chemikalienbeständigkeit. FKM bietet in all diesen Punkten eine außergewöhnliche Leistung.

FKM wird gemäß dem ASTM D2000-Standard zur Klassifizierung von Elastomeren als „HK“ eingestuft. Hier zeigt H an, dass sich die Leistung einer FKM-Dichtung nach längerer Einwirkung von Temperaturen von 250 °C (480 °F) nur sehr wenig verschlechtert. FKM funktioniert auch bei niedrigen Temperaturen bis zu -40 °C (-40 °F) gut.

Wobei K die Widerstandsfähigkeit gegen Aufquellen angibt. Da K die niedrigstmögliche Bewertung ist, bedeutet dies, dass FKM weniger aufquillt als fast alle anderen Elastomermaterialien. FKM ist auch sehr chemikalienbeständig und widersteht Ozon, typischen Autokraftstoffen und Kohlenwasserstoff-Schmierölen. Allerdings liefert FKM keine so guten Ergebnisse gegen starke Säuren, Basen und Ketone.

Anwendungen von Viton® für Gummidichtungen

Viton®-Dichtungen wurden aufgrund ihrer Kraftstoffbeständigkeit und geringen Brenneigenschaften zuerst in der Luft- und Raumfahrtindustrie verwendet. Heute finden sie Anwendung in der Fluidtechnik, der Automobil-, Haushaltsgeräte- und Chemieindustrie. Darüber hinaus wurden die Einsatzmöglichkeiten von FKM mit der Einführung von FDA-Klassen auch auf die Lebensmittelverarbeitungs- und Pharmaindustrie ausgeweitet.

Viton®-Dichtungen werden für raue Umgebungen mit hohen Temperaturen dringend empfohlen. Aufgrund ihrer chemischen Beständigkeit werden sie häufig mit Schmier- und Heizölen, Benzin, Pflanzenölen, Alkoholen, verdünnten Säuren, Hydrauliköl und Kerosin verwendet. Darüber hinaus finden sich Viton®-Anwendungen auch in Kraftstoffdichtungen, Kappendichtungen, T-Dichtungen und Radiallippendichtungen in Pumpen. FKM-Dichtungen bieten außerdem eine hervorragende UV-Beständigkeit, was sie zu einer hervorragenden Wahl für Anwendungen macht, bei denen mit längerer Sonneneinstrahlung zu rechnen ist.

Wir hoffen, dass Sie diese Informationen nützlich fanden. Wenn Sie FKM- oder Viton®-Dichtungen für Ihre Anwendung suchen, stellt Harkesh Rubber erstklassige Produkte her, die Ihren Dichtungsbedarf decken. Tatsächlich können wir Niedertemperatur-FKM-Dichtungen herstellen, die bis zu -50 °C standhalten! Kontaktieren Sie uns einfach für Ihren Bedarf an Viton®-Dichtungen.

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Understanding the Importance of FKM Gaskets in Industrial Applications

What are FKM Gaskets?

FKM gaskets stand for Fluoroelastomer gaskets, they are synthetic rubber seals designed to create secure connections between two surfaces. In recent years, FKM has emerged as a crucial component for specialized gasket and seal industries, including chemical processing, petroleum, automotive, and aerospace. Their exceptional quality of resistance to heat, chemicals, and environmental factors makes them indispensable in various industrial settings. FKM are commonly referred to by their brand name, Viton® – a registered trademark of the Chemours Company.

The Significance of FKM Gaskets

In industries where machinery operates under extremely harsh conditions, maintaining tight seals is paramount for preventing the leakage of fluids or gases. FKM gaskets excel in environments where traditional materials may fail due to exposure to high temperatures, aggressive fuels, chemicals, or intense pressure without degrading or losing their sealing capabilities. Their versatility and reliability ensure integrity, efficiency, and safety in critical applications.

Read more...

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A Comprehensive Guide to Choosing the Right Custom Sealing Manufacturer in India

The efficiency and reliability of industrial products are often based on the quality of seals used. That’s why companies from diverse sectors such as automotive, aerospace, pharmaceuticals, and many more choose Harkesh Rubber for their custom sealing needs. In this article, we will explore key considerations that can guide you in making an informed choice while choosing quality seals:

Material Options: Different applications require varied materials, and a reputable manufacturer should offer a wide range to meet varying needs. Each material has unique properties, such as resistance to heat, chemicals, abrasion, and flexibility.

At Harkesh Rubber, for example, we offer quality seals made of HNBR, NBR, FKM, Silicone, EPDM, and Neoprene. Our seals are versatile and cost-effective, making them suitable for a broad range of applications.

Customisation Capabilities: Look for manufacturers with robust customisation capabilities. This includes designing seals to fit unique shapes, sizes, and specifications. At Harkesh Rubber, we have experienced engineers who can collaborate with you to understand your application’s intricacies and offer solutions that enhance performance and longevity.

In addition to custom shapes and sizes, we also provide specialised features such as colour coding, branding, or unique markings. Customisation extends beyond the physical attributes of the seal to packaging and labelling, ensuring a seamless integration into your production process.

Quality Assurance and Certifications: Reputable custom sealing manufacturers adhere to stringent quality control measures and hold relevant industry certifications. These certifications serve as indicators of a manufacturer’s commitment to producing high-quality products that meet or exceed industry standards. Harkesh Rubber has ISO 9001-2015 certification, a globally recognised standard for quality management systems, ensuring consistency and traceability in manufacturing processes.

Supply Chain and Lead Times: Evaluate the custom sealing manufacturer’s supply chain capabilities. Harkesh Rubber has reliable sources for raw materials and can maintain consistent production levels. We offer short lead times and a reliable supply chain that can contribute significantly to minimizing downtime in your production process.

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Harkesh Rubber holds a strong repute at production of custom rubber gaskets to cover all the sealing needs. Gaskets form an integral component of any solution which requires the confinement of a gas or liquid. Our company earned a testimony through delivery demonstration for one or the client’s by restoring problems with their OE systems of heat exchange.

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Discover the versatility of FKM seal gaskets in our comprehensive guide. Learn about Viton® (FKM), its applications, material grades, and key properties.

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FKM Seals

Discover the versatility of FKM gaskets in our comprehensive guide. Learn about Viton® (FKM), its applications, material grades, and key properties.

Many of the most challenging sealing applications require a heavy-duty gasket that can perform exceptionally well in the harshest of conditions. Such applications often call for gaskets made from a family of fluoroelastomers called FKM. While Viton® is the generic name for FKM, it actually is a brand name of DuPont for its synthetic rubber and fluoropolymer elastomer.

The FKM family of elastomers consists of copolymers or terpolymers of tetrafluoroethylene (TFE), vinylidene fluoride (VDF) and hexafluoropropylene (HFP), hexafluoropropylene (HFP) and vinylidene fluoride (VDF or VF2) and perfluoromethylvinylether (PMVE). Since DuPont was the first company to really market this material, its brand name Viton® has become the most commonly associated name with FKM.