A question about elastomer
A question about elastomer
(OP)
Who knows whether there is a generic compound name of the following elastomers Nordell, Kalrez or Chemraz? Any weblink about it?
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A question about elastomer
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A question about elastomerA question about elastomer(OP)
Who knows whether there is a generic compound name of the following elastomers Nordell, Kalrez or Chemraz? Any weblink about it?
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RE: A question about elastomer
But the generic compound names are not the same materials. In elastomers the properties (especially aging and degredation) are closely linked to the fillers, cure agents, and additives that are used.
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Rust never sleeps
Neither should your protection
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RE: A question about elastomer
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: A question about elastomer
Thanks a lot for the information. I believe they are both in FFKM family. But why some websites regard it as PTFE and call it Elastomeric PTFE.
RE: A question about elastomer
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/
RE: A question about elastomer
Adding to the statements above, the names Kalrez and Chemraz are trade names covering a family of compounds that exhibit very specific chemical compatibility and physical properties. In the Kalrez line there are about 8 compounds (1058, 6375, etc) and in the Chemraz line there are about 12 compounds (505,555,etc). This means that Kalrez will not always substitute for Chemraz and vice verse.
Unless you have very specific references the compatibility charts for any base materials are for relative pure fluids and should be used only as a starting point, especially if you have mixed fluids.
The selection of an Oring compound is a fairly complex task, much more than getting a black one off the shelf.
Anecdotal:
A changing an Oring compound cost my company over 8 million dollars due it's failure and the resultant explosion and fire.
We were using an EPDM Oring compounded to be nonconductive to seal a feed through on an electrolytic cell. The nonconductive Oring cost $2.35 each. Purchasing in their infinite wisdom found an EPDM Oring for $0.49. The conductive Oring allowed enough electric leakage through the feed through to heat the gland to where it failed. This leak to release of conductive liquid, highly flammable organics, Hydrogen and Oxygen.
RE: A question about elastomer
If you are looking at using these materials then you know how expensive they are, and you must have a very critical application.
When I was buying elastomers we had a simple rule. We would qualify a specific formulation from each potential supplier, and they had to commit in writing that if they changed any ingedients (even just sources of the same material) they would have to requalify. period. no exceptions.
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm