Excellent tear and abrasion resistance. Good performance against oxygen and ozone. We have hydrolysis resistant blends, good cold flexibility and low friction. Polyurethanes are mainly used in applications where resistance to abrasion and high pressure in contact with mineral oils is required.
Viton® fluorinated rubber (FPM or FKM)
The most outstanding characteristics of these materials are their high resistance to temperatures from -20ºC to 200ºC and their chemical stability. It also stands out for its low gas permeability and low residual deformation. In general, it behaves badly in contact with solvents, ketones and amines. For applications in hot water and steam, special mixtures are required.
It is the most chemically and thermally resistant elastic material that can be used for fluid sealing. Blends are available to work in applications with temperatures up to 316ºC.
Acrylonitrile butadiene (NBR)
Acrylonitrile-butadiene polymer, good swelling resistance to mineral oils and greases, and aliphatic hydrocarbons (propane, butane, etc.), good cold flexibility and low residual deformation. It is one of the most widely used materials in fluid sealing.
EPDM is one of the most weather- and ozone-resistant elastomers and can operate at temperatures ranging from -40°C to +150°C. Peroxide and sulphur cured EPDM is manufactured. Peroxide cured EPDM has excellent temperature resistance, low residual deformation and the ability to work in contact with food products. Peroxide-cured EPDM is most suitable for working with hot water or steam. Sulphur cured EPDM has better tensile strength and elongation at break. Little or no resistance to contact with mineral oils, greases, synthetic oils and hydrocarbons. In the sealing industry they are mainly used in the manufacture of O-rings and lip seals.
CR (chlorobutadiene) material has good resistance to ozone cracking and thermal ageing. In contact with fluids, it has good chemical resistance to refrigerants, aliphatic hydrocarbons, mineral oils and greases. In sealing, they are used as O-rings or lip seals.
Silicone Fluoride (FVMQ)
Methylsilicone rubber with low fluorine content. Its main characteristic is its cold flexibility, which allows this material to be used in applications where the temperature is extremely low, from -60ºC to +175ºC. Good behaviour in contact with petrol and mineral oils.
A polymer manufactured by Asahi Glass, known in the market as Aflas®, which thermal working field is similar to that of FKM. Excellent chemical resistance to acid, gases, steam, hot water and hydraulic fluids. Poor behaviour in contact with aromatic and chlorinated hydrocarbons. For O-rings, sealing elements for mechanical seals and various seal profiles for applications in the chemical, petrochemical and oil extraction industries.
Hydrogenated NBR (HNBR)
Hydrogenated NBR. The hydrogenation process gives NBR excellent resistance to temperature and ozone. Good behaviour in contact with mineral and synthetic oils. Temperature range from -20ºC to +150ºC.
Natural rubber (NR)
High mechanical resistance and elasticity. Good cold behaviour and resistance to low concentration acids and lyes. High swelling of mineral oils and greases, petrol and hydrocarbons.
PTFE, generally known by its trade name Teflon®, is characterised by its high chemical resistance, its wide temperature range of -200ºC to +260ºC and its low coefficient of friction. These characteristics mean that this material, although not elastic, is used in a wide range of applications. PTFE is manufactured pure and with a wide variety of fillers in order to adapt it to the mechanical requirements of different applications.
Silicone rubber. It is characterized by its high thermal resistance (-60ºC to +200ºC), good flexibility in cold, excellent gas permeability and good resistance to oxygen and ozone attacks. Average resistance to mineral oils, water and steam at temperatures above 100ºC. Mixtures compatible with food and pharmaceutical products are manufactured. Silicone gaskets are manufactured for static and dynamic applications.
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