NBR seals

NBR for low-wear hydraulic and pneumatic seals

Acrylonitrile butadiene rubber, often simply called NBR or nitrile rubber, is a synthetic rubber of chemical stability and high abrasion resistance. The abbreviation NBR results from its English name nitrile butadiene rubber. This modern sealing material is an elastomer also known by the trade names Maypren, Perbunan or Elaprimodor. Steinbach AG uses this material to manufacture high-performance quality seals and moulded parts for your individual requirements.

Properties

NBR (nitrile butadiene rubber) is resistant to diesel, alcohols, oils, petrol, greases, diluted alkaline solutions and acids, biogas, aliphatic hydrocarbons and hot water. It is generally true that the chemical resistance of NBR increases with the rising amount of acrylonitrile. However, NBR is not resistant to UV radiation and ozone.

Please note that

• NBR seals with a high amount of acrylonitrile are suitable for higher temperatures up to a maximum of 120 °C.
• NBR seals with a low amount of acrylonitrile are suitable for lower temperatures down to a minimum of -30 °C.

The material hardly becomes electrostatically charged so that there is no reason to fear any sparking. Furthermore, NBR is classified as being physiologically harmless.

Additionally, NBR disposes of good mechanical properties like, for example:

• low compression set
• high tensile strength
• high abrasion resistance

Benefits

• predestined for low-wear seals
• resistant to propane and butane
• resistant to animal and vegetable oils and greases
• resistant to hot water up to a maximum of 80 °C
• resistant to silicone oils, silicone greases, diluted alkaline solutions and acids
• resistant to mineral oils and fuels
• high abrasion resistance and tensile strength
• low permanent deformation

Our available formats

We will provide you with NBR as plate and rolled goods, as seals according to DIN standard as well as in individual cuts using our ultramodern 3D purewater cutting machinery making a precise assembly possible. Do you require a seamless XXL format? We can manufacture for you even that one. We deliver starting already at a quantity of 1 piece. Please get into contact with us. Whether by phone, e-mail or contact form, we would be happy to advise you.