Feb. 24, 2025
Buna, EPDM, Viton® are all similar seal materials but what stands each of these apart? Choosing the right elastomer or polymer material is important for a number of reasons. While it may not seem like a major decision, the material chosen determines the quality, lifespan, and performance of an application. From snapping to peeling to breaking; a seal material that is a poor fit for an application can lead to a number of issues down the road. Seal material has a long-term effect on your application&#;s capabilities.
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The information outlined below will offer guidance and provide the best solution based on the most defined aspects of your application including:
The term &#;high elasticity&#; is known in the industry as the ability of an object to return to its shape once it no longer is attached to its source of stress. Rubber compound represents a wide collection of materials &#; known as elastomers &#; which includes base elastomer, vulcanization agents, fillers, and plasticizers its main feature being high elasticity. Therefore, rubber is widely considered the best material for objects known as &#;seal materials&#;.
Questions to consider when selecting the right seal material for an application include:
Whether you&#;re choosing Buna (Nitrile), EPDM, or Viton®, it&#;s important to compare and consider all key features and benefits.
When it comes down to abrasive, water and oil resistant, and super-strength properties; Buna is the most cost-effective elastomer. Buna, also referred to as Nitrile rubber, is commonly known as the industry&#;s most economical option in the wide variety of seal material options to choose from. Buna is well known in the industry for its mechanical performance and is the top performer when it comes down to oil-based, petrochemical, and chemical applications. The more Nitrile in a polymer means a higher resistance to chemicals, acids, and other oils.
Therefore, Buna is widely used in the industry for crude oil, water, various alcohol, silicone grease, and hydraulic fluid applications due to its inflexibility.
Buna is comprised of synthetic rubber copolymer that performs well in applications requiring metal adhesion and abrasion-resistant material &#; this chemical background makes it ideal for sealant applications. Designed with a moderately poor acid and mild alkali resistance, Buna can also withstand low temperatures. However, Buna is limited to extremely high temperatures, can be weather and sunlight resistance, and steam resistance &#; making it limited to more extreme applications. Buna is also not suitable with CIP sanitizing agents containing acids and peroxides, such as OXONIA.
Key advantages and benefits to consider about Buna include:
Disadvantages of Nitrile rubber include:
Key applications for Nitrile rubber in the valve industry:
When considering flexibility strength, weather resistance, and the ability to withstand extreme conditions, EPDM is an excellent option. EPDM, also known as Ethylene Propylene Diene Monomer, is a specific type of synthetic rubber and one of the most commonly used elastomeric materials for automotive, construction, and mechanical good applications. Slightly more expensive when compared to Buna, it can withstand a variety of thermal, weather, and mechanical properties because of its long-lasting high tensile strength. It&#;s ideal for applications that involve water, chlorine, bleach, and other alkaline materials. From waterproofing needs to HVAC needs, EPDM is used for a variety of industrial applications because of its resistance to weathering, ozone, and deionized water. With both elastic and adhesive properties, once stretched EPDM always returns to its original shape regardless of the temperature. However, EPDM is not recommended for petroleum oil, fluids, chlorinated hydrocarbon, or hydrocarbon solvent applications.
Key advantages to consider about EDPM includes:
Disadvantages of EPDM include:
EPDM is used across a wide range of industrial applications, including:
Viton® is the more expensive option over BUNA and EPDM seals but it&#;s the perfect high-end solution for applications exposed to extreme weather, ozone, and chemical degradation. Significantly more expensive when compared to EPDM and Buna, Viton® is a long-lasting high-performance fluorinated hydrocarbon rubber product most commonly used in O-Ring and seals for the valve industry. Excellent for resistance to ozone, oxidation, and extreme weather conditions &#; including a variety of materials such as aliphatic and aromatic hydrocarbons, halogenated fluids, strong acid materials &#; Viton® is one of the robust fluoroelastomers. Designed to withstand extreme temperatures, Viton® seals are the preferred option for the most challenging and demanding sealing needs.
Viton® is able to provide support for an extremely broad range of substances and features exceptional good resistance to high temperatures and excellent resilience capabilities.
Key advantages to consider about Viton® include:
Disadvantages of Viton® include:
Reliable material for:
As noted above, choosing the correct polymer is highly important for a variety of reasons. While all seal materials are similar, each polymer serves a wide variety of purposes to meet your specific need. If you need further assistance choosing the right rubber material or polymer for your valve application, please contact Flomatic Valves by visiting Flomatic.com or calling (800) 833-.
In this comprehensive guide, we will take an in-depth look at rubber seals and gaskets, examining their significance in various industries, exploring the various types available, and highlighting crucial factors to consider when making your choice. We will also provide valuable tips on maintaining these items and, importantly, how to know when they need replacing. Let&#;s dive in and unlock the untapped potential of rubber seals and gaskets for your industry!
In oil and gas or any industry that involves machinery or systems that transport fluids or gases, rubber seals and gaskets play a pivotal role in ensuring everything runs smoothly. But what exactly are rubber seals and gaskets, and what functions do they serve?
At their core, rubber seals and gaskets are flexible components designed to prevent the leakage of fluids or gases between two connecting parts of a system. They are made from various rubber materials, which give them the resilience and elasticity to withstand high pressure, high temperatures, and potential corrosive substances they might come into contact with.
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The primary function of rubber seals and gaskets is to maintain a tight seal between connecting parts, effectively preventing the escape or entry of fluids or gases. This is crucial for maintaining system pressure and efficiency, as well as preventing potential contamination in sensitive applications like food processing or pharmaceutical manufacturing.
Whether it&#;s a car&#;s braking system, a heating and cooling system in a building, or a food processing machine, rubber seals and gaskets contribute significantly to the overall performance and safety of the systems. Understanding the essential role of these components is the first step in selecting the right ones for your industrial applications.
Rubber gaskets are essential components used in various industries to provide a reliable seal between two surfaces. Different gasket materials can withstand different pressures, temperatures, and other factors, such as moisture, chemicals, and oxidation. Sometimes finding the perfect seal isn&#;t going to happen. Finding the best possible sealing material is the key. They offer distinct properties that make them suitable for specific applications. Here, we will explore the common types of rubber gasket materials.
Natural rubber offers excellent mechanical properties, including high elasticity and tensile strength. It&#;s highly resistant to abrasion and tear and is often used in applications involving dynamic stresses. However, its resistance to heat and oil is quite limited.
Nitrile rubber is known for its excellent oil and fuel resistance. It also provides good resistance to heat, wear, and abrasion, making it an ideal choice for sealing applications in the automotive and industrial sectors.
Silicone rubber provides superb resistance to high and low temperatures, ozone, and UV light. Although not as strong as other rubber types, its non-reactive nature makes it suitable for medical and food-related applications.
FKM rubber offers excellent chemical and heat resistance. It&#;s highly valued in the aerospace, automotive, and energy industries where components need to withstand harsh conditions.
EPDM is characterized by its superior resistance to ozone, weathering, and aging. It&#;s extensively used in outdoor applications and for sealing hot water and steam.
Choosing the right gasket material is crucial as it ensures optimal performance based on environmental conditions. The importance of selecting the right material for your seal or gasket cannot be overstated. The wrong material can cause a seal or gasket to fail resulting in equipment damage, production delays, shorter product life, or even injury. Material selection should always begin with an assessment of the application in which the seal or gasket will be utilized to ensure it meets your specific needs.
When selecting a rubber seal or gasket for your specific application, there are several important factors to consider. These factors will ensure that you choose the right material that can withstand the demands of your particular environment.
By carefully considering these factors, you can make an informed decision when choosing rubber seals and gaskets for your specific application. This will help ensure optimal performance, longevity, and reliability in your equipment or machinery.
Remember, selecting the right rubber seal or gasket is crucial for maintaining proper functionality and preventing leaks or failures. Take into account temperature range, pressure requirements maximum temperature, chemical exposure, and operating conditions to find a suitable material that meets all these needs. With careful consideration and evaluation, you can confidently choose a rubber seal or gasket that will perform effectively in your specific application.
Rubber seals and gaskets, though often overlooked, play a crucial role in ensuring the optimal operation of various equipment and machinery. To extend their lifespan and ensure they continue to function effectively, it&#;s essential to understand how to properly maintain and replace these components.
Perform regular inspections of your rubber seals and gaskets. Look for signs of wear, deformation, hardening, or cracking. These could be early indicators that the seal or gasket is failing and needs replacement.
Some cleaning agents can cause the deterioration of rubber materials. Always ensure the cleaning agents used are compatible with your specific rubber material. Avoid using harsh chemicals that can degrade the rubber.
Over-compressing a rubber seal or gasket can cause it to deform, leading to leaks or failures. Ensure the seal or gasket is correctly fitted and that there&#;s sufficient compression to create a seal without deforming the component.
Extreme temperatures can degrade rubber material. Therefore, when not in use, rubber seals and gaskets should be stored in a cool, dry place away from sunlight, ozone, and extreme temperature changes.
Even with optimal maintenance, rubber seals and gaskets have a finite service life. It&#;s important to have a regular replacement schedule based on the manufacturer&#;s guidelines or the specific demands of your application.
If you&#;re uncertain about the state of your gasket or seal, seek advice from your manufacturer. They possess the necessary expertise to guide you on maintenance or when a replacement is necessary.
Maintaining your rubber seals and gaskets can greatly increase their lifespan and the overall effectiveness of your machinery. Always remember, proactive maintenance is far cheaper than reactive maintenance.
Choosing the right rubber seals and gaskets is a crucial aspect of maintaining operational efficiency and reliable performance in your industry. By understanding their differences, materials used, and essential maintenance tips, you can make an informed choice that fits your specific application needs, thereby improving performance and reducing maintenance costs.
Partnering with Hongju Silicone means benefiting from our expertise and commitment to quality. We offer a broad range of rubber seals and gaskets to meet diverse industrial requirements.
Our team of technical specialists, design engineers, and industrial experts has created custom gaskets, and our experienced team can provide guidance on selecting the appropriate material for your application.
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