Polyether ether ketone and stainless steel
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For the valve plate of a compressor valve, which material is better to use: polyether ether ketone or stainless steel?
Polyether ether compounds produce less noise when used as valve discs, but they have limitations regarding pressure and temperature; refer to API618 section 2.7.10 for details. It can be used at 13.5 Mpa and below 180 degrees.
Polyether ether ketone is PEEK, right?
The pressure in my compressor has already exceeded 135 bar – is PEEK still a suitable material? Is there anything that can replace it?
PEEK was used in the development of the isolation sleeves for the new generation of fluoroplastic magnetic pumps, so I have a PEEK manual; the image above shows the PEEK isolation sleeve, while the image below displays the parameters from the manual
Reply to 4# winer.LIU: Stainless steel such as 1Cr13 or 2Cr13 can be used. The API standard is a recommendation; for specific applications, it is possible to discuss this with the compressor manufacturer. I suspect that PEEK may not be suitable for such high pressures.
Peek is no problem; it can handle both stress and other performance requirements