What is the difference between ferrules made of stainless steel vs stainless steel and PEEK hybrids – FAQ

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ARTICLES, APPNOTES, FAQ (9289)
- AppNotes Library (1888)
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- Frequently Asked Questions?? (3402)
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May 31, 2013
Bill Ciccone

ARTICLES, APPNOTES, FAQ / Chromatography Accessories & Supplies Information / Column Hardware FAQ / Di-Ad Column Connector Information / Fittings & Tubing for HPLC FAQ / Frequently Asked Questions?? / HPLC Column Information / HPLC Columns FAQ

Stainless steel ferrules are used exclusively when:

• Absolute maximum operating pressure is required, in excess of 15,000 PSI.
• The connection is ‘permanent’; that is, the connection will not be made and broken often, such as when changing columns.

The Stainless Steel / PEEK hybrid ferrule (called a high performance ferrule) is:

• Typically limited to 15,000 PSI with multi cone ferrule fittings
• Limited to 10,000 PSI with a single cone HPLC nut
• Can be re-used a limited number of times if not over torqued, or if used on SS tubing

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