Product category:
Seals
News Release from: Freudenberg Simrit LP | Subject: 70 EPDM 291 O-rings
Edited by the Engineeringtalk Editorial
Team on 07 July 2003
Elastomer reduces high-temperature
permeability
With the recently developed elastomer compound 70 EPDM 291, Freudenberg has once again succeeded in improving the long-term permeability of O-rings, especially at high temperatures.
With the recently developed elastomer compound 70 EPDM 291, Freudenberg has once again succeeded in improving the long-term permeability of O-rings, especially at high temperatures O-rings and O-ring-type seals in special shapes made of 70 EPDM 291 are resistant in water up to 180C and in air up to 150C
This article was originally published on Engineeringtalk on 18 Oct 2004 at 8.00am (UK)
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One of the decisive parameters for the long-term stability of elastomer materials is the compression set (CS).
As a measurement of the residual deformation of an elastomer material following operating pressure over a specific period, the compression set should always be as low as possible.
O-rings made of the elastomeric material 70 EPDM 291 have an extremely low compression set of 20% after 1kh long-term stress in water at 150C.
The formerly widely used elastomer EPDM 28145 only achieves a compression set of 95% under the same conditions.
O-rings made of the Freudenberg compound 70 EPDM 291 are not only ideal for use at high temperatures in water and air (such as in heating and cooling circuits), they also have universal approval for use with drinking water.
70 EPDM 291 has been granted approval in accordance with OVGW, DVGM W 270, WRC, the French drinking water standard Afnor and NSF, KTW.
It also meets FDA requirements.
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