FKM Viton™ Diaphragms
Viton™ FKM fluorocarbon diaphragms are engineered for sealing, isolation, and actuation applications where aggressive fluids, elevated temperatures, and continuous flexing push standard elastomers beyond their limits. These diaphragms are typically formulated in 60 to 90 Shore A durometers depending on flexibility requirements, offering a balance of chemical resistance, mechanical strength, and long-term durability in dynamic environments.
Viton™ diaphragm seals are commonly used in pumps, valves, regulators, and control systems where precise movement and reliable sealing are required under exposure to fuels, oils, solvents, and harsh process media. Their low permeability and strong resistance to hydrocarbons, ozone, and aging make them ideal for applications where both sealing performance and diaphragm integrity are critical. Fluorocarbon materials are widely recognized for their ability to withstand oils, fuels, aromatics, and many aggressive chemicals while maintaining performance at elevated temperatures.
The engineers and consultants at Canyon Components work closely with customers to select the optimal Viton™ diaphragm material, balancing flexibility, thickness, reinforcement, chemical compatibility, and cycle life. Contact our expert team for assistance with Viton™ diaphragms, O-rings, gaskets, and custom molded components.
Common names include: FKM (Fluorocarbon), Fluorocarbon Rubber
Trade names include: Viton™, Fluorel®, Technoflon®, Dai-El®
FKM O-rings from Canyon Components providing excellent chemical, heat, and compression resistance in critical sealing applications.
Viton™ Diaphragm Elastomer Materials Available
This table shows many of our standard materials and links out to our O-ring store. Get in touch with us if you need a custom gasket, custom molded part, or non-standard geometry!
Canyon Components stocks Viton® O-rings in AS568, JIS, and Metric sizes with custom molded FKM part options.
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Features of Viton™ Diaphragms
- Viton™ diaphragms, O-rings, gaskets, and custom molded parts provide excellent resistance to fuels, oils, lubricants, and hydrocarbon-based fluids
- Viton™ diaphragms maintain sealing integrity and flexibility under repeated pressure cycling and mechanical movement
- Viton™ diaphragms, O-rings, gaskets, and custom molded parts offer strong resistance to ozone, oxygen, and environmental aging
- Viton™ diaphragms provide low gas permeability, making them suitable for vacuum and controlled flow applications
- Viton™ diaphragms, O-rings, gaskets, and custom molded parts can be manufactured with fabric reinforcement for improved dimensional stability and pressure resistance
- Viton™ diaphragm materials offer good compression set resistance, helping maintain long-term sealing performance
- Viton™ diaphragms, O-rings, gaskets, and custom molded parts are available in custom geometries, thicknesses, and profiles for precise application requirements
Limitations of Viton™ Diaphragms
- Viton™ diaphragms, O-rings, gaskets, and custom molded parts have poor resistance to hot water and superheated steam
- Depending on the formulation, Viton™ diaphragms are not recommended for glycol-based fluids, strong amines, ketones, or highly polar solvents
- Depending on the blend, Viton™ diaphragms are not compatible with ammonia gas or strong inorganic bases
- Viton™ diaphragms, O-rings, gaskets, and custom molded parts typically have a service temperature range of approximately -15°F to 400°F (-26°C to 204°C), though specialized compounds can extend this range
- Repeated high-flex fatigue in very thin diaphragm sections may require reinforcement or alternative materials such as EPDM, PTFE, or FFKM depending on the application
Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.
FKM & Viton™ High Performance Polymer Types
There are many types of FKM Polymer Types that Canyon Components offers.
This includes FKM Types A, B, F, GLT, GFLT, XLT, ULT, ETP, & TBR.
The table below is a Viton™ selection guide that lays out the pluses and minuses of each variation.
Key: 1 = Excellent 2 = Good 3 = Poor 4 = Not Recommended
| Types of FKM | A | GF | GLT | GLT ED | GFLT | XLT | ETP | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Canyon Compound Number | VT75BK00 | VT75BK20 | VT75BK30 | VT90BK31 | VT75BK40 | VT75BK50 | VT75BK60 | |||||||
| Description | General Purpose | General Purpose High Fluorine |
Low Temp | Low Temp Resistant to Explosive Decompression |
Low Temp High Fluorine |
Extreme Low Temp High Fluorine |
Viton® Extreme High Fluorine FEPM |
|||||||
| Cure Type | Bisphenol | Peroxide | Peroxide | Peroxide | Peroxide | Peroxide | Peroxide | |||||||
| Typical Fluorine Content | 66 | 69.5 | 64 | 64 | 66.5 | 66.5 | 67 | |||||||
| Typical High Temp Range °F (°C) | 437 (225) | 437 (225) | 437 (225) | 437 (225) | 437 (225) | 437 (225) | 437 (225) | |||||||
| Typical Low Temp Range °F (°C) | -15 (-26) | -15 (-26) | -40 (-40) | -40 (-40) | -35 (-37) | -54 (-48) | -6 (-21) | |||||||
| TR-10 °F (°C) | 1 (-17) | -6 (-21) | -22 (-30) | -22 (-30) | -11 (-24) | -40 (-40) | 12 (-11) | |||||||
| Oxygenated Automotive Fuels (containing MeOH, EtOH, MTBE, etc.) | 4 | 1 | 4 | 4 | 1 | 1 | 1 | |||||||
| Reciprocating Engine Lubricating Oils (SE-SF Grades) | 2 | 1 | 1 | 1 | 1 | 1 | 1 | |||||||
| Aliphatic Hydrocarbon Process Fluids,Chemicals | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||||||
| Aromatic Hydrocarbon Process Fluids, | 1 | 1 | 2 | 2 | 1 | 1 | 1 | |||||||
| Aqueous Fluids: Water, Steam, Mineral Acids (H2SO4, HNO3, HCl, etc.) | 3 | 1 | 1 | 1 | 1 | 1 | 1 | |||||||
| Amines, High pH Caustics | 4 | 4 | 4 | 4 | 4 | 4 | 1 |
Industrial Usage of Viton™ Diaphragms
Viton™ diaphragms are selected for applications where chemical resistance, sealing reliability, and long service life are critical in flexing components. These diaphragms are widely used in fluid control systems where elastomers must maintain performance under pressure cycling, aggressive media exposure, and elevated temperatures.
Canyon Components supports customers with diaphragm material selection, geometry optimization, and application-specific recommendations to ensure consistent performance and long-term reliability.
Oil and Gas Industry
Viton™ diaphragms are used in regulators, valves, and control systems exposed to hydrocarbons, fuels, and harsh chemical environments where durability and sealing integrity are critical.
Chemical Processing
Viton™ diaphragms are applied in pumps and valves handling aggressive chemicals, solvents, and mixed process fluids requiring strong chemical resistance.
Energy and Power Generation
Viton™ diaphragms are used in control systems, pumps, and fluid handling equipment operating under elevated temperatures and demanding service conditions.
Industrial Equipment
Viton™ diaphragms are commonly used in compressors, pumps, pressure regulators, and automation systems requiring reliable flexing seals and long cycle life.
Aerospace Industry
Viton™ diaphragms are selected for fuel, hydraulic, and actuation systems where chemical resistance, low permeability, and consistent performance are required.
Please consult a Canyon Components Engineer about your specific application and we will use our decades of experience to formulate a solution that fits your need.
All Other FKM (Viton™) Types Available
Viton™ Type A – General Purpose FKM
Viton™ Type A FKM O-rings, gaskets, and custom molded parts provide balanced heat and chemical resistance. This general purpose fluorocarbon elastomer is widely used in industrial sealing applications involving fuels, oils, and hydrocarbons.
Viton™ Type B – Improved Chemical Resistance FKM
Viton™ Type B FKM offers enhanced resistance to aggressive fuels, aromatics, and chemical blends compared to Type A. This high-fluorine fluorocarbon elastomer is commonly specified in demanding fuel systems.
Viton™ Type F – Improved Chemical Resistance FKM
Viton™ Type F FKM provides superior resistance to oxygenated fuels, solvents, and aggressive chemical environments. This fluorocarbon elastomer is frequently used in automotive and industrial fuel sealing applications.
Viton™ Type GF – High Fluorine FKM
Viton™ Type GF FKM features increased fluorine content for improved resistance to fuels, biodiesel, and harsh chemicals while maintaining strong mechanical properties and sealing reliability.
Viton™ Type GLT – Low Temperature FKM
Viton™ Type GLT FKM delivers improved low-temperature flexibility compared to standard fluorocarbon elastomers, supporting sealing performance in colder climates without sacrificing chemical resistance.
Viton™ Type GFLT – Low Temperature and Chemical Resistant FKM
Viton™ Type GFLT FKM combines enhanced low-temperature flexibility with improved resistance to aggressive fuels and chemical blends, making it suitable for demanding fluorocarbon sealing applications.
Viton™ Type ETP – Specialty Chemical Resistant FKM
Viton™ Type ETP FKM provides exceptional resistance to aggressive chemicals, steam, and amines. This specialty fluorocarbon elastomer is often used in oil, gas, and chemical processing systems.
Viton™ Type ULT – Ultra Low Temperature FKM
Viton™ Type ULT FKM is engineered for ultra-low temperature environments while maintaining fluorocarbon chemical resistance, making it suitable for extreme cold industrial and aerospace sealing systems.
Viton™ Type XLT – Extreme Low Temperature FKM
Viton™ Type XLT FKM extends low-temperature sealing capability beyond GLT grades, offering reliable fluorocarbon elastomer performance in severe cold and aerospace environments.
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