EPDM - Ethylene propylene diene monomer
Thanks to its excellent stability in water and aqueous solutions, EPDM is one of the most widespread materials in the food and pharmaceuticals industry with its share of approx. 70 percent.
Freudenberg Process Seals EPDM materials stand out because of their wide and therefore also extremely cost-effective range of applications in the process engineering. Seals made of EPDM show high media stability in hot water, steam, acids and alkaline solutions and are recommended in all polar media and therefore also in CIP /SIP media. However EPDM is only of limited use in fatty and oily products. While it is well suited for use with animal fats at low temperatures, using it with pure fats and oils at a high temperature is not possible. For this purpose, Freudenberg offers special elastomers such as HNBR or Fluoroprene® XP.
General properties:
- Excellent aging, ozone and light stability
- Frequently used as profile and sealing strips that are exposed to the weather
- High cold and heat resistance, approx. –40 °C bis +150 °C
- High strength
- Good elongation at break
- Extremely high wear resistance
Characteristics of different EPDM compounds:
- 60 EPDM 290 60 Shore compound for diaphragms / black
- 70 EPDM 291 standard material for o-rings / black
- 70 EPDM 253815 standard material for o-rings and molded parts / white
- 85 EPDM 292 85 Shore compund for o-rings and molded parts / black
Suitable applications
- in hot water and water steam (permanently 180 °C, briefly 210 °C)
- acids (hydrochloric acid, nitric acid and phosphoric acid)
- alkaline solutions (sodium hydroxide, potassium hydroxide)
- ozone (40 °C, 1000 pphm)
- CIP /SIP media for continuous plants in the food, beverage and pharmaceutical industries
- Assembly grease to be used: Silicone grease (e.g. Paraliq GTE 703 with NSF H1 license)
| Technical Specification | |
|---|---|
| Material | EPDM |
| Color | black and white |
| Cross-linking | peroxidic |
| Hardness Shore A (DIN 53505) | 75 ± 5 (Test plate) |
| Hardness IRHD (DIN ISO 48 M) | 70 +5 /–8 (O-Ring) |
| Density (DIN EN ISO 1183) | 1,09 g/cm3 |
| Tensile strength (DIN53504) | > 12 N/mm2 |
| Elongation at breaK (DIN 53504) | > 140% |
| Volume resistivity | > 109 Ohm |
| Surface resistivity | > 109 Ohm |
| Compression set (24 h, 150°C, 25 %) DIN ISO 815) |
< 20% |
| Temperature resistance | –40 °C bis +150 °C (+180 °C in water and water vapor) |
Approvals & Licenses
- FDA conformity (CFR 21 Part 177.2600)
- BfR conformity 21st recommendation
- Animal derived Ingredient free (ADI free®)
- 3-A® Sanitary Class II (Note: Class II due to poor fat resistance, sterilization up to 121 °C, cleaning up to 82 °C possible)
- USP Class VI
- Drinking water: German DVGW (work sheets W270 and 534), German KTW, WRc-NSF, NSF 61, Austrian ÖVGW, ACS, WQC
- BAM (Federal Institute for Materials Research and Testing): Use in pure oxygen up to 60 °C max. 15 bar, 60 to 90 °C max 10 bar
- Ozon: at 40 °C to 1000 pphm
Do you have any questions?
Downloads
- Black EPDM - general information (pdf | 0,23 MB)
- White EPDM Flyer (pdf | 0,23 MB)
- 60 EPDM 290 - technical data sheet (pdf | 0,04 MB)
- 70 EPDM 291 - technical data sheet (pdf | 0,04 MB)
- 85 EPDM 292 - technical data sheet (pdf | 0,04 MB)