EPDM O-Rings are also referred to as ethylene-propylene o-rings
because of the chemical composition of the same name. The use of EPDM
o-rings and seals are commonly found in the automotive manufacturing
industry where sealing of brake systems is required. EPDM material is also
compatible with heat as in steam and water vapor. In terms of chemical
resistance, it has the ability to withstand mild acids and greases. Similar
chemical media that are compatible with EPDM material include ketones,
alkalis, silicone oils and alcohols.
Applications where ethylene-propylene compounds may not be suitable for use
with include di-ester, petroleum, lubricants and fuel. Weathering and
exposure to ozone degradation is one of the criteria in specifying
ethylene-propylene sealing material. Where most other elastomeric compounds
fail to perform upon contact with polar fluids, epdm o-rings and seals are
an excellent choice.
The exceptional characteristics of EPDM to withstand weathering and high
temperature has made them the idea choice for many applications particularly
in automotive manufacturing. The continuous research and development of EPDM
since it was introduced for commercial use at the start of the 1960s has
made it the number three most widely used synthetic elastomer today. The
elastic characteristics of EPDM, together with its flexibility at low
temperatures has made it highly compatible for use in automotive brake
systems and hose. SBR or styrene-butadiene rubber as well as natural rubber
have been substituted by EPDM elastomers due to their exceptional ability to
withstand coolant chemicals and dry heat.
EPDM o-rings and seals are available in both metric selection and in
standard AS568.
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