Rating
| Concentration | 20 °C | 50 °C | Remark |
|---|---|---|---|
| concentration not stated | B | C | |
| FR, 80°C | – | – |
Material comparison at 20 °C
Resistance overview
Viton (FPM) shows good but limited resistance (B) to Dibutyl Phthalate (DBP) at 20 °C. The material can be used in contact with this chemical, but minor effects such as slight swelling or a small reduction in mechanical properties may occur over extended exposure periods. Regular inspection of components in service is advisable. However, at 50 °C the resistance rating drops, indicating that temperature must be factored into the design. For heated applications, additional testing under actual service conditions is strongly recommended.
Application context
Dibutyl Phthalate (DBP) is commonly encountered in de-icing and food processing. Viton (FPM) (Fluoroelastomer (FKM/FPM)) is an elastomer typically used for seals, O-rings, hoses and flexible connections. The compatibility between these two is therefore an important consideration for engineers and procurement teams selecting containment, transfer, or processing equipment.
Practical recommendation
Viton (FPM) is suitable for use with Dibutyl Phthalate (DBP) under normal conditions, but some minor effects on the material are expected over time. Periodic monitoring for swelling, softening, or weight change is recommended, especially for long-service components. Avoid prolonged exposure at elevated temperatures, as the resistance decreases further at 50 °C. For safety-critical or long-life applications, consider HDPE, Nylon (PA), PETG instead, which are rated A for this chemical.
Did you know?
The chemical resistance of Viton (FPM) depends not only on the chemical concentration but also on exposure time, mechanical stress, and the presence of other chemicals in the mixture.
Materials rated A or B at 20 °C
Based on the row for concentration not stated, 20 °C.
- Thermoplastics
- HDPE A, PP B, Nylon (PA) A, Acetal (POM) A, Polysulfone A, PETG A
- Fluoropolymers
- PTFE A, PVDF A, FEP A, ECTFE/ETFE A
- Metals
- SS 316 A, SS 304 A, Aluminium A
About Viton (FPM)
Fluoroelastomer (Viton, FKM/FPM) resists fuels, oils and many acids. Ketones, esters, amines and hot water or steam attack it.
Rating scale
- A very good resistance
- B good resistance
- C limited resistance
- D not resistant
- – no data
- K no general statement possible
A rating marked * is an estimate in the source, not a test result. An estimate is given as one value without a temperature.
About this data
The ratings come from the chemical resistance list published by Bürkle GmbH, which compiled them from raw-material manufacturers’ data. They describe laboratory tests on the raw material at 20 °C and 50 °C.
A finished part also sees pressure, mechanical stress, welds and mixtures that a laboratory test does not. Treat the rating as a first filter and test under your own conditions before relying on it.