Product category:
Seals
News Release from: Freudenberg Simrit LP | Subject: 75 HNBR 231127 O-rings
Edited by the Engineeringtalk Editorial
Team on 17 February 2003
Elastomer seals handle both gas and
water
With the development of a universally applicable HNBR elastomer, Simrit reckons it has created the ideal material for O-rings that are used to seal both gas and water.
With the development of a universally applicable HNBR elastomer, Simrit reckons it has created the ideal material for O-rings that are used to seal both gas and water O-rings made of 75 HNBR 231127 not only remain impervious over an extremely long period of time, they also retain the residual imperviousness needed to prevent explosions in the event of fire
This article was originally published on Engineeringtalk on 18 Feb 2003 at 8.00am (UK)
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Moreover, O-rings made of this new HNBR elastomer compound have also received KTW approval for use with drinking water (KTW is a German legislative provision governing the use of plastics and drinking water).
The brand-new 75 HNBR 231127 elastomer was specially developed to meet the strict requirements of the gas and water sectors.
One of its key properties is its universal applicability for sealing water and gas.
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According to Freudenberg, the pneumatic complete piston Pneuko M sets new standards in terms of durability and frictional behaviour.
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Freudenberg has succeeded in developing a Simmerring for industrial applications which combines the properties of both PTFE and elastomer materials.
This means that press fittings, fittings and flanges can now be sealed using only one single type of O-ring material.
This reduces not only the cost of logistics and storage but also the risk of mix up during assembly.
Thanks to the universal 75 HNBR 231127 O-ring, users will always have the right seal in the right place, regardless of whether the fitting is required for water of fluid hydrocarbons.
These universal O-rings are yellow: a definite identification advantage, especially when it comes to gas applications.
Another defining feature of Simrit's 75 HNBR 231127 elastomer is its extremely low compressive strength relaxation.
This makes it ideal for the long-term sealing of gas pipelines and gas supply systems in particular.
Thanks to the combination of resistance to fluid hydrocarbons and reliable, long-term imperviousness, there were no difficulties in getting approval for 75 HNBR 231127 elastomer in accordance with EN682.
All of the elastomer's material parameters are well within this DVGW (German Technical and Scientific Association on Gas and Water) standard.
Moreover, the O-ring's residual imperviousness in the event of a fire has been proven at 650C for 30min, in accordance with the DVGW's VP614 standard.
In addition to its outstanding gas-sealing properties, 75 HNBR 231127 elastomer is also ideal for sealing water in all sorts of applications.
And it has the letters of approval to show it.
The resistance of these O-rings meets the requirements of the EN681-1 standard.
Regardless of whether it is used for cold water, 70C hot air or deionised water, this recently developed elastomer's values for compressive stress relaxation, hardness alteration, compression set and exposure to ozone are all in line with this DVGW specification.
Its compatibility with drinking water is also backed up by a KTW approval.
The fascinating properties of yellow 75 HNBR 231127 sealing elastomer are available in O-ring form in all standard dimensions (ex warehouse) and special shapes.
(This was Engineeringtalk's Top Story on 14 February 2003).
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