Vane material

[tdsdesign]

We are designing a rotary vane pump that will be pumping pure oxygen.   There is a concern about using carbon based materials from an ignition standpoint.  With that in mind we are looking to use non-metallic vanes.  The vane material is Torlon 4301 which is 12% graphite powder and 3% teflon. The vane loads are low and the Max operating temp is 160 deg F. Do you have any experience with this or comments? Any other material suggestions (max PV is 13,000).

 

[koen]

You should consider using carbon filled PTFE, this material
can be used up to 200 degrees celcius.
If you use the compression moulding technique this material should be excellent for vanes. You can also use a virgin PTFE with a glass filling

 

[wmv]

We have extensive experience in vane applications, their are a few materials we recommend, our Fluorolon PEEK being the most common, it has the mechanical strength, deminsional stabilty and does not have the hydrolitic problems of Torlon.

If the application does not see moisture at elavated temperatures Torlon would be satisfactory. Please let me know if you need further info.

Good Luck

 

[kahhin]

You may try PPS + 15%carbon fiber + 10% PTFE + 2% PEEK. We do some experiment (not for oxygen services) by compare above formula with 10%carbon fiber 10%PTFE 10%GRAPHITE 70%POLYETHERETHERKETONE. PPS base material show better performance at 60 DEG C. *PPS is very low cost.