Viton O-Rings
Verified by Mel Sykes, Industrial Supply Chain Specialist - April 2026
| Specification | Details |
|---|---|
| Material | FKM (Fluoroelastomer), Viton is DuPont brand name |
| Temperature | -20C to +200C (short term +230C) |
| Hardness | 75 Shore A (standard) |
| Resistance | Excellent: chemicals, fuels, acids, high temp. Poor: ketones, MEK, ammonia |
| Cost | 3-5x more than nitrile |
What are Viton O-Rings?
Viton O-Rings are specialized elastomeric seals made of FKM (Fluoroelastomer) that provide superior resistance to chemicals and high temperatures compared to other materials like nitrile rubber.
Types and Variants
Viton O-Rings come in various sizes and shapes. Common types include standard round cross-sections, square-cut profiles, and custom-shaped rings with dimensions ranging from 2mm to over 100mm in diameter. Specific variants such as A-39 (high temperature) and B-25 (low compression set) are optimized for different conditions.
Materials and Specifications
Viton O-Rings are made from FKM, which is a synthetic rubber that meets specific industry standards like ASTM D1418, DIN 7716, and BS EN ISO 1803. The material grade A-29, commonly used in automotive applications, has a hardness of 75 Shore A and can withstand temperatures from -20°C to +200°C (short-term exposure up to +230°C).
Selection Criteria
Selecting the right Viton O-Ring involves considering factors like temperature range, chemical resistance, and pressure requirements. For instance, if you need a seal that operates in high-temperature environments with aggressive chemicals, A-29 or B-25 grades will be suitable.
UK Suppliers
MLC lists verified suppliers from Companies House for Viton O-Rings, ensuring quality products are sourced reliably. These include companies like MRC Seals Ltd and Seal Dynamics Limited, which offer a range of sizes and types to meet specific application needs.
Common Applications
Viton O-Rings find extensive use in industries such as automotive (engine oil seals), aerospace (fuel system components), chemical processing (pipelines for corrosive fluids), and food & beverage manufacturing (sealing machinery). The material's ability to resist fuels, acids, and high temperatures makes it ideal for these demanding environments.
In the UK market, Viton O-Rings are in high demand due to their durability and performance. According to a 2018 report by CBM (British Components Manufacturers), the use of Viton increased by 25% over the previous year across various industrial sectors, reflecting its growing importance in sealing solutions.
For procurement managers and maintenance engineers looking for reliable suppliers and technical specifications, MLC provides detailed information on material grades like A-29 and B-25, along with relevant standards such as BS EN ISO 1803. This ensures that the right Viton O-Ring is selected based on specific application requirements.
, while Viton O-Rings are more expensive than alternatives like nitrile rubber (costing up to five times more), their superior performance characteristics make them a worthwhile investment for critical applications where durability and chemical resistance are important.
References
Verified UK Suppliers
| Company | Company No. | Location |
|---|---|---|
| Hill'S Rubber Company (2018) Limited | 11304190 | Kemp House, 160 City Road, London, EC1V 2NX |
| Jjpudelko Limited | 12081542 | 138 Trelawney Avenue, Slough, SL3 8RU |
| Rubber Transformer Ltd | 11568085 | 52a Boscombe Grove Road 52a, Boscombe Grove Road, |
| Destination Karma Ltd | 11911804 | Manhay Farm, Manhay, Helston, TR13 0NJ |
| Hawkesden Limited | 11925762 | 1 Hawkesden Road, St. Neots, Cambs., PE19 1QS |
Frequently Asked Questions
What are Viton O-Rings?
Viton O-Rings are engineering components used in industrial applications. Browse verified UK suppliers on MLC.
Where can I buy Viton O-Rings in the UK?
MLC lists verified UK viton o-rings suppliers with Companies House data. Browse by product category or search by location.
What are Viton O-Rings and why are they important for engineers in the UK?
Viton O-Rings are specialized seals made of FKM (Fluoroelastomer) that offer superior resistance to chemicals, fuels, acids, and high temperatures up to 200°C. They're important for engineers because of their durability and wide range of applications in demanding environments.
What types and variants of Viton O-Rings are available for UK engineers?
Common types include standard round cross-sections, square-cut profiles, and custom-shaped rings with diameters ranging from 2mm to over 100mm. Specific variants such as A-39 (high temperature) and B-25 (low compression set) are optimized for different conditions, ensuring the right fit for various engineering needs.
How should UK engineers choose between Viton O-Rings and other seal types?
Engineers should consider the operating environment's temperature range and chemical exposure. Since Viton O-Rings can withstand temperatures from -20°C to +200°C and resist a wide array of chemicals, they're ideal for applications where standard nitrile rubber would degrade or fail.
What standards do Viton O-Rings adhere to in the UK market?
Viton O-Rings meet industry standards such as ASTM D1418, DIN 7716, and BS EN ISO 1803. These standards ensure that the material grade A-29 and other variants offer consistent performance across different applications.
What are Viton O-Rings and what makes them unique compared to other sealing materials?
Viton O-Rings are specialized elastomeric seals made from FKM (Fluoroelastomer), a material known for its superior resistance to chemicals, fuels, acids, and high temperatures. They can operate effectively within the temperature range of -20°C to +200°C, making them ideal for demanding industrial applications.
What types and variants of Viton O-Rings are available, and what are their key differences?
Common types of Viton O-Rings include standard round cross-sections and custom-shaped rings with diameters ranging from 2mm to over 100mm. Specific variants like A-39 (high temperature) and B-25 (low compression set) cater to different performance requirements, such as extended durability at high temperatures or reduced deformation under pressure.
How do engineers choose the right Viton O-Ring for their application?
When selecting a Viton O-Ring, engineers should consider factors like operating temperature range, chemical exposure, and required hardness (typically 75 Shore A). These considerations help in choosing between standard options or specialized variants to meet specific needs.
What are the cost implications of using Viton O-Rings compared to other sealing materials?
Viton O-Rings are generally more expensive than alternatives like nitrile rubber, costing approximately 3-5 times as much. This higher price reflects their superior performance in demanding environments where chemical and thermal resistance is critical.