O-Rings
O-rings are made of elastomers.
- Shore hardness
- Density
- FTIR-Spectroscopy recording to determine the material type
- Chemical resistance
- Swelling
- Volume change
- Density change
- IRM reference oils 901, 902 and 903
- Temperature resistance
- Cold resistance
- Ozone test
EPDM
Ethylene-propylene-diene rubber (EPDM)
EPDM are resistant to high hot water and steam resistance. EPDM also has very good aging and ozone resistance. The cold resistance is good compared to the usual types of synthetic rubber. The behavior against oils, greases and solvents corresponds approximately to that of butadiene styrene rubber. The chemical resistance, even against oxidizing agents is very good. Temperature range from -50 C to +140 C depending on the type used.
NBR
Acrylonitrile butadiene rubber (NBR)
NBR rubber is resistant to the action of mineral oils, in particular hydraulic oils, greases, gasoline and other aliphatic hydrocarbons, dilute acids and alkalis. Good physical values such. B. high abrasion and stability and a favorable temperature resistance (-25 C to +120 C, sometimes even to -40 C) ensure this rubber a wide range of applications.
HNBR
Hydrogenated nitrile rubber (HNBR)
The HNBR O-rings have a high resistance to additive-containing, technical oils, low vapor and gas permeability, good cold flexibility of up to -30 C depending on the type used, good ozone resistance and a high abrasion resistance. HNBR seals are heat resistant up to + 150 C.
FKM/FPM
Fluoro rubber (FKM / FPM)
FKM are resistant to the action of mineral oils, aliphatic and aromatic hydrocarbons as well as chlorinated hydrocarbons, concentrated and diluted acids, weak alkalis. An excellent temperature resistance up to +200 C and a low temperature resistance down to -40 C depending on the type used as well as high mechanical properties and excellent aging resistance make FKM / FPM rubber (including Viton) far superior to conventional synthetic rubbers.
