Fluoroelastomer is a high quality heat and weather resistant rubber that has excellent resistance to ozone, oxidation, mineral oils, fuels, hydraulic fluids, aromatic and other organic solvents and chemicals.
- Data applicable to seals, O-rings, and hydraulic hoses (not only, of course):
FPM. More details
FPM is a semi-finished product made from bisphenol-crosslinked fluoride rubber (Viton DU PONT). FPM usually colored brown.
Properties
FPM is highly resistant to temperatures and chemicals. Temperature range: from 0 o C to +200 o C (short term up to +230 o C). Thanks to its rich structure and chemical composition This material has excellent resistance to ozone, weathering and aging. Swelling in various media is very low, also in aromatic hydrocarbons. This material can also be used in high vacuum conditions.
FPM does not burn.
Resilience data
| Good stability | Medium stability | Low/zero stability |
| Mineral oils and fats | Hot water | - |
| Aliphatic hydrocarbons (propane, butane, gasoline) | - | Skidrol 500 |
| Silicone oils and fats | - | Ammonia, amines, alkalies |
| Vegetable and animal oils and fats | - | Hot water vapor |
| Fuel, also super-flammable | - | Low molecular weight organic acids (formic and acetic) |
| Oils with sulfur and highly aromatic oils | - | Flux acid, chlorosulfonic acid |
| Highly flammable liquid group HFD-S And HFD-R | Highly flammable liquid groups H.F.A., HFB, HFC | Polar solvents (acetone, methyl ethyl ketone, dioxane) |
| Biodegradable hydraulic fluids | - | Glycol-based brake fluids |
| Aromatic hydrocarbons (gasoline, toluene) | - | - |
| Chlorinated hydrocarbons | - | - |
Application area
FPM mainly used in areas with high load temperatures and chemicals. Moreover, FPM used in hydraulic systems with highly flammable hydraulic fluids of the group HFD and as a pre-tensioning element for polyurethane seals in biodegradable liquids.
Preferred Application:
- special seals in chemical industry and in heating engineering;
- shaft seals;
- O-rings;
- hydraulic seals for HFD-liquids.
Basic physical and mechanical characteristics of FPM
|
Properties |
Unit |
Meaning |
Test standard |
| Hardness | SHORE A | 85±5 | DIN 53505 |
| Density | g/cm 3 | 2.50±0.03 | DIN 53479 |
| Tensile strength | N/mm 2 | ≥10 | DIN 53504 |
| Tensile strength | % | ≥90 | DIN 53504 |
| Permanent deformation 100 o C/22h | % | ≤14 | DIN 53517 |
| Wide Tear Strength | N/mm | 17 | DIN 53515 |
| Rebound Elasticity | % | 8 | DIN 53512 |
| Abrasion | mm 3 | 180 | DIN 53516 |
| Minimum application temperature | o C | -20 | - |
| Maximum application temperature | o C | +200 | - |
| Thermal aging 24h/230 o C: hardness change change durable to break change durable tensile |
SHORE A % % |
+3 +11 -18 |
DIN 53505 DIN 53504 DIN 53504 |
| Behavior in ASTM oil no. 1 n. DIN 53521 70h/150 o C: hardness change change durable to break change durable tensile change volume |
SHORE A % % % |
-1 +15 -20 -0,2 |
DIN 53505 DIN 53504 DIN 53504 DIN 53521 |
| Behavior in ASTM oil no. 3 n. DIN 53521 70h/110 o C: hardness change change durable to break change durable tensile change volume |
SHORE A % % % |
-2 +6 -20 +1,9 |
DIN 53505 DIN 53504 DIN 53504 DIN 53521 |
Viton®- this is registered trademark fluorine rubber, company-owned DuPont. A rubber mixture is made from fluorine rubber, from which a seal is then made. In accordance with various standardization systems, the phrase “fluorine rubber” is denoted by various abbreviations, but the meaning and the material itself do not change. The abbreviation FPM is in accordance with the guidelines of the International Organization for Standardization (ISO), the abbreviation FKM is in accordance with the designation adopted by the American Society for Testing and Materials (ASTM). Those. FPM is the international name and FKM is the American name for the same material. In Russia, the abbreviation FC is accepted (SKF-26, SKF-32). Viton® fluorine rubber began to be produced in 1957. The start of production of this material made it possible to solve many problems in major industries such as:
- Aerospace industry
- Automotive industry
- Chemical industry and transport
- Food and pharmaceutical industry
- Equipment for working in undeveloped areas and in harsh conditions operation
- Exploration and production in oil and gas fields
- Oil refining and transportation
The main applications of fluoroelastomers are oil seals, radial lip seals, sealants, coatings, vibration dampers, expansion joints, gaskets, O-rings, rod seals, cords and plates. At the moment, the most common types of rubbers are rubbers general purpose: Viton® A, Viton® B, Viton® F. Fluorinated rubbers based on these rubbers differ in their resistance to oxygen-containing automobile fuels, motor oils, liquids on water based. Also, there are fluorine rubbers special purpose- Viton® GLT, Viton® GFLT, Viton® Extreme, Viton® Base Resistant. Types of fluorine rubbers:
| Viton® | A | B | F | GLT | GFLT | Extreme | Base Resistant |
|---|---|---|---|---|---|---|---|
| % fluoride | 66 | 68 | 70 | 64 | 66 | 56 | - |
| Chemical resistance | ++ | +++ | ++++ | + | ++++ | ++++ | ++++ |
| Durability to high temperature |
+++ | +++ | +++ | +++ | +++ | +++ | +++ |
| Durability to low temperature |
+ | 0 | - | ++++ | ++ | + | + |
Note: the more + signs, the better the properties of the rubber.
FPM / FKM / Viton® (Fluoroelastomer) - works well in environments exposed to a variety of aggressive liquids. Systems using Viton® products are more resistant to a wide range of chemicals. Has excellent mechanical and physical properties, the fluorine content in the rubber mixture ensures the non-flammability of this material. Fluorinated elastomers have low gas permeability and minimal weight loss when operating in a vacuum.
Viton® is a registered trademark of fluorine rubber owned by DuPont, and today Viton is considered the best of all existing fluorine rubbers. A rubber mixture is made from fluorine rubber, from which a seal is then made. In accordance with various standardization systems, the phrase “fluorine rubber” is denoted by various abbreviations, but the meaning and the material itself do not change.
The abbreviation FPM is in accordance with the guidelines of the International Organization for Standardization (ISO), the abbreviation FKM is in accordance with the designation adopted by the American Society for Testing and Materials (ASTM). Those. FPM is the international name and FKM is the American name for the same material. In Russia, the abbreviation FC is accepted (SKF-26, SKF-32).
Viton® fluorine rubber began to be produced in 1957. The start of production of this material made it possible to solve many problems in major industries such as:
Aerospace industry
· Automotive industry
Chemical industry and transport
· Food and pharmaceutical industry
Equipment for working in undeveloped areas and in difficult operating conditions
· Exploration and production in oil and gas fields
· Oil refining and transportation
The main applications of fluoroelastomers are oil seals, cups, sealants, coatings, vibration dampers, compensators, gaskets, membranes, plugs, diaphragms, heat-resistant O-rings, rod seals, heat-resistant cords and plates.
At the moment, the most common types of rubbers are general purpose rubbers: Viton® A, Viton® B, Viton® F.
Fluorinated rubbers based on these rubbers differ in their resistance to oxygen-containing automobile fuels, motor oils, and water-based liquids.
There are also fluorine rubbers for special purposes - Viton® GLT, Viton® GFLT, Viton® Extreme, Viton® BaseResistant.
Types of fluorine rubbers:
|
Base |
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Chemical resistance |
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Durability |
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Durability |
Note: the more + signs, the better the properties of the rubber.
FPM / FKM / Viton® (Fluoroelastomer) - works well in environments exposed to a variety of aggressive liquids. Systems using Viton® products are more resistant to a wide range of chemicals. It has excellent mechanical and physical properties; the fluorine content in the rubber mixture ensures the non-flammability of this material. Fluorinated elastomers have low gas permeability and minimal weight loss when operating in a vacuum.
Stability data (Viton, FPM, FKM)
|
Good stability |
Medium stability |
Low/zero. sustainability |
|
mineral oils and lubricants |
hot water |
|
|
aliphatic hydrocarbons (propane, butane) |
skydrol 500 |
|
|
silicone oils and fats |
ammonia, amines, alkalis |
|
|
vegetable and animal oils and fats |
superheated water vapor |
|
|
flammable, also super flammable |
Low molecular weight organic acids (formic and acetic acids) |
|
|
oils with sulfur and highly aromatic oils |
hydrofluoric acid, chlorosulfonic acid |
|
|
highly flammable hydraulic fluids of the HFD-S group (phosphoric acid esters, some types may cause destruction) and HFD-R (chlorinated hydrocarbons) |
highly flammable hydraulic fluids of groups HFA, HFB, HFC |
polar solvents (acetone, methyl ethyl ketone, dioxane, ethyl acetate) |
|
biodegradable hydraulic fluids |
glycol based brake fluids |
|
|
aromatic hydrocarbons (benzene, toluene) |
Application range of viton seals
(Viton, FPM, FKM) is mainly used in areas with high temperature and chemical loads. Moreover, fluoride rubber is used in hydraulic systems with highly flammable HFD hydraulic fluids and as a pre-tensioning element for QH-PUR - chemical resistant polyurethane - seals in biodegradable liquids.
Resistant to:
· fuel
· aging
· aggressive chemical compounds
mineral oils and fats
· silicone oils and fats
· oils with sulfur and highly aromatic oils
biodegradable hydraulic fluids
ozone
aliphatic hydrocarbons (propane, butane, gasoline)
aromatic hydrocarbons (gasoline, toluene)
chlorinated hydrocarbons
ultraviolet radiation
Not resistant to:
· broadcasts
Glycol-based brake fluids
organic acids, such as octic and formic
flux acid
chlorosulfonic acid
Ketones (acetone, acetophenone)
hot water steam
· ammonia
· amines
polar solvents (acetone, methyl ethyl ketone, dioxane)
Operating temperature range of fluorine rubber rings: from -20°C to +200°C, withstands short-term heating up to +230°C. In some cases, properly designed fluorine rubber parts based on special frost-resistant Viton rubber can ensure tightness of fixed joints even at temperatures below -60°C.
It should be taken into account that when the temperature of fluoroelastomer seals increases above +300°C, toxic gases and vapors begin to be released from them, and even after cooling, these materials are unsafe.
Information on the performance of rubber based on Viton fluorine rubber at elevated temperatures:
· 10,000 hours at T=204 °C.
· 3000 hours at T=232 °C.
· 1000 hours at T=260 °C.
· 240 hours at T=288 °C.
· 48 hours at T=316 °C.
Viton® retains good sealing properties after exposure to air for more than 10,000 hours at temperatures up to 204°C.
Basic physical and mechanical characteristics (Viton, FPM, FKM)
|
Properties |
Unit |
Meaning |
Test standard |
|
Hardness |
GOST 263 |
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Density |
GOST 267 |
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Modulus at 100% elongation |
MPa (N/mm 2) |
GOST 270 |
|
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Conditional tensile strength |
MPa (N/mm 2) |
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Elongation at break |
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Resistance to tearing apart |
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Compression permanent deformation (air) 100°C/24h |
GOST 9.029 |
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Rebound elasticity |
GOST 27110 |
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Abrasion |
GOST 12251 |
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Minimum application temperature |
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Maximum application temperature |
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Thermal aging in air 168h/225°C: |
Unit Shore A |
3 |
GOST 9.024 |
|
Aging in oil SZhR-1 70h/150°C: |
Unit Shore A |
1 |
GOST 9.030 |
|
Aging in oil SZhR-3 70h/150°C: |
Unit Shore A |
2 |
GOST 9.030 |
Able to withstand large temperature changes (from -40 to +200°C) and resistant to aggressive environments, but at the same time maintaining their properties, they are made from special fluorine-containing rubbers.
Viton seal
The Viton brand, which produces fluorine rubber, is considered the best today. A special rubber mixture is made from fluorine rubber, which is then used to make seals for hydraulic mechanisms. Viton seal also has the abbreviation FKM (the American name for this material).
The Viton seal, as well as the FKM seal, perform well in a variety of aggressive liquids. Mechanisms that use Viton cuffs have good physical and mechanical properties. Due to the fluorine content in this product, this material is non-flammable.
Viton ring
The Viton O-ring has an operating temperature range from -20°C to +200°C. Short-term heating up to +220°C is possible. Sometimes the mechanism requires a very low temperature to operate, for example, about -50°C. In this case, you will need a Viton seal made of special frost-resistant rubber. When fluorine rubber is heated above +300°C, this material begins to emit toxic fumes, which is not safe even when cooled.
Due to their chemical composition, Viton oil seals are highly resistant to any weather influences, as well as aging. In aromatic hydrocarbons and other environments, Viton fluorinated elastomer swells, but this is not significant. Fluorine rubber can also be used in high vacuum conditions.
Chemical resistance characteristics of Viton
| Good stability | Medium stability | Low/zero stability |
|---|---|---|
| mineral oils and lubricants | hot water | |
| aliphatic hydrocarbons (propane, butane) | skydrol 500 | |
| silicone oils and fats | ammonia, amines, alkalis | |
| vegetable and animal oils and fats | superheated water vapor | |
| flammable, also super flammable | Low molecular weight organic acids (formic and acetic acids) | |
| oils with sulfur and highly aromatic oils | hydrofluoric acid, chlorosulfonic acid | |
| highly flammable hydraulic fluids of the HFD-S group (phosphoric acid esters, some types may cause destruction) and HFD-R (chlorinated hydrocarbons) | highly flammable hydraulic fluids of groups HFA, HFB, HFC | polar solvents (acetone, methyl ethyl ketone, dioxane, ethyl acetate) |
| biodegradable hydraulic fluids | glycol based brake fluids | |
| aromatic hydrocarbons (benzene, toluene) |
Viton seals for sale
RUSEVROSTAL supplies VITON clamp seals from stock. You can buy clamp seals made from epdm, silicon, viton and ptfe. Clamp gaskets are supplied according to DIN and SMS standards.
Seal clamp material VITON(Viton/FPM/fluororubber).
Working temperature:-20°C to 200°C. Viton is briefly suitable for steam sterilization up to 130-140°C.
Application area: The elastomer is used in contact with mineral and vegetable oils, animal fats, greases and fuels.
IMPORTANT! Do not use when working: with polar solvents (acetone, ethyl acetate, diethyl ether).
Drawing, photo and size range of VITON clamp seals
| DN | d3 | d5 | Weight, kg |
|---|---|---|---|
| 10 | 34 | 10,2 | 0,002 |
| 15 | 34 | 16,2 | 0,003 |
| 20 | 34 | 20,2 | 0,004 |
| 25 | 50,5 | 26,2 | 0,005 |
| 32 | 50,5 | 32,2 | 0,005 |
| 40 | 50,5 | 38,2 | 0,006 |
| 50 | 64 | 50,2 | 0,007 |
| 65 | 91 | 66,2 | 0,013 |
| 80 | 106 | 81,2 | 0,014 |
| 100 | 119 | 100,2 | 0,015 |
| 125 | 155 | 125,2 | 0,024 |
| 150 | 183 | 150,2 | 0,031 |
| 200 | 233,5 | 200,2 | 0,059 |
Fluororubber (Viton, FPM, FKM) This is a synthetic rubber that is obtained by copolymerizing fluorine-containing monomers (VITON is a registered trademark of Du Pont).
Fluororubber is used for the production of collar - U-shaped seals, chevron type seals, wipers, rings and other seals.
Characteristics of fluorine rubber (Viton, FPM, FKM)
- Fluorine rubber (Viton, FPM, FKM) is colored brown.
- Fluoride rubber (Viton, FPM, FKM) is highly resistant to temperatures and chemicals.
- Temperature range of Fluorine rubber (Viton, FPM, FKM): from -20°С to +200°С (short-term up to +230°С).
Due to its rich structure and chemical composition, this material has excellent resistance to ozone, weathering and aging. Swelling in various media is very low, also in aromatic hydrocarbons. This material can also be used in high vacuum conditions. FK is compatible with mineral oils, sulfur containing fats, HFD fluids (almost all phosphate esters, chlorinated hydrocarbons), crude oil and sour gas.
Fluororubber (Viton, FPM, FKM) is not resistant to anhydrous ammonia, amines, ketones, esters, hot water and low molecular weight organic acids.
Areas of use
Rubber mixtures based on fluorine-containing rubbers are significantly superior to hydrocarbon compounds (natural, nitrile, acrylate, etc.) and are designed to work in such harsh conditions that hydrocarbon and natural rubber cannot withstand. Fluororubbers are used to produce wide range rubber products for the aerospace, automotive, chemical industries, mechanical engineering, etc. Fluororubber parts are usually used in fixed and limited-moving joints of devices and various production and transport equipment, where increased heat resistance and chemical resistance are required.
