fkm seal material
RESISTANCE FKM SEALS
Good resistance | Average resistance | Low resistance |
|---|---|---|
Mineral oils | Hot water | – |
Aliphatic hydrocarbons (propane, butane, petrol) | – | skidrol 500 |
Silicone oil and grease | – | ammonia, amines, alkali |
Adipose and vegetable oils and grease | – | Hot steam |
Fuels | – | Low-molecular organic acids (acetic and formic acids) |
Oils with soot and highly aromatic oils | – | Hydrofluoric acids, chlorosulfonic acids. |
Fire-resistant hydarulic fluids HFD-S, HFD-R | Fire-resistant hydraulic fluids HFA, HFB, HFC | Polar solvents (acetone, methyl ethyl ketone, dioxane, ethylacetate) |
Biodegradable hydraulic fluid | – | Brake fluids based on glycol |
Aromatic hydrocarbon (toulene, benzol) | – | – |
Application
In practice verified that the seals by type “V-Ring” out of FPM capable of working at very high speeds, up to 78 m/s.
Mainly used
- Non-standard seals in chemical industry and thermal engineering in metallurgy;
- Rotary shaft seals;
- O-rings;
- Hydraulic seals for HFD-fluids
FKM Material Data Sheet
Properties | Value | Unit | Standard |
|---|---|---|---|
Hardness at 20°: | 85 +/-2 | Shore A | DIN 53505 |
Density: | 2,51 | g/cm³ | DIN ISO 1183-1 |
100% Modulus: | >6,5 | N/mm² | DIN 53504 |
300% Modulus: | > / | N/mm² | DIN 53504 |
Tensile strength: | >9,2 | N/mm² | DIN 53504 |
Elongation at break: | >180 | % | DIN 53504 |
Rebound resilience: | >6 | % | DIN 53512 |
Tear strength: | >5 | N/mm² | DIN ISO 34-1 |
Abrasion: | <230 | mm³ | DIN 53516 |
Compression set:* | < / | % | DIN ISO 815-1 |
Compression set:** | < / | % | DIN ISO 815-1 |
Compression set:*** | < / | % | DIN ISO 815-1 |
Compression set:**** | < 8 | % | |
Min. service temperature: | -20 | °C | |
Max. service temperature (short term): | +200 (+230) | °C |
*Compression set @ 23°C, 72 hours, 10% deflexion
**Compression set @ 70°C, 24 hours, 20% deflexion
***Compression set @ 100°C, 24 hours, 20% deflexion
****Compression set @ 225°C, 22 hours, 10% deflexion
All above established data results from random tests which were taken from the functioning production. All data was stated based on standard test-products in accordance with ISO, DIN and ASTM standards and can substantially not be extended to the completed seal. Our practical technical recommendation, either oral, written or through tests is given in conformity with our best knowledge. However, this data is to be regarded as non-obligatory advice, also taking into consideration any protective rights of a third party, and does not acquit you from making tests with our product in relation to its adaptability for the assigned process and intendment. Utilization, application and processing of the products befall completely outside of our control and are therefore solely your liability. As regards the responsibility, it will be limited to all damages in the value of the product which we delivered and you applied. Certainly, we do assure the immaculate quality of our products in concordance with our general sales and delivery conditions.
Technical Description of FKM (Fluoroelastomer) Rubber
Chemical Resistance: As an FKM seal material, it exhibits unparalleled resistance to oils, fuels, and most acids, alongside excellent oxidation, UV, and weathering resistance.
Mechanical Properties: The high tensile strength and low compression set of FKM material contribute to its effectiveness in FKM tubes and FKM bushings, making it suitable for strenuous mechanical conditions.
Low Permeability:The low gas and fluid permeability of FKM is crucial in sealing applications, such as in FKM tubes and FKM bushings, particularly in the automotive and aerospace sectors.
FKM Tubes and FKM Bushings: Ideal for components requiring durability in harsh environments, such as in automotive and aerospace applications.
Chemical Processing: Used in seals, hoses, and components due to its resistance to aggressive chemicals.
Oil and Gas: FKM material is essential in seals and components exposed to extreme conditions.
Grades and Variations: Different grades of FKM are available, each designed for specific environments, influencing the material’s interaction with various fluids and chemicals.
