Appendix D: Fluid Compatibility Tables
fct-4 09/30/2010 LV1 User Manual D-1
Appendix D: Fluid Compatibility Tables
The following table is compiled primarily from data published by several manufacturers of
elastomers and plastics. The ratings are intended only as a guide. In fact, different sources do not
always agree, so it is best to test before committing to a particular compound.
In general, most chemical attacks on elastomers and plastics are in the form of swelling and
softening. The function of the individual part determines how much swelling and softening can be
tolerated. In addition, some materials are resistant to certain fluids at room temperature but will
be attacked at an elevated temperature. Duration of exposure is also a factor. Again, it is best to
test.
A considerable body of data exists beyond what is presented here. If the fluids you are concerned
with do not appear in this list, please contact MFIC for our best assessment of probable
compatibility.
The Elastomers
Otherwise known as Buna N or NBR. This is one of the most common synthetic rubber materials.
Nitrile is normally used in the air motor of the Microfluidizer equipment, though it can certainly
be used in fluid contact as well.
Nitrile:
Also called EPR or Ethylene Propylene Rubber. A specialty elastomer with excellent resistance to
ketones and most alcohols, but EPR is seriously attacked by petroleum oils, so the user must be
careful about lubricating this compound. Toughness and temperature resistance are very good.
EPDM:
Also called FKM, this a premium elastomer with a broad range of chemical compatibility. Excellent
in oil services, but poor in ketones and some alcohols. Colored brown for easy identification. This
is our commonly used elastomer for fluid contact services.
Fluoroelastomer: (Trade name, Viton):
Otherwise known as Chloroprene or CR, this is one of the earliest known types of synthetic rubber.
Useful in applications such as ammonia and Freon.
Neoprene:
The Plastics
Ultra high molecular weight polyethylene, an extremely tough, wear-resistant thermoplastic with
good chemical resistance and moderate temperature resistance. Used for seals and gaskets.
UHMWPE:
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