Learning Center | Lafferty Equipment Manufacturing, Inc.

Check Valve Chemical Compatibility

Chemical suction and compressed air check valves need to be replaced occasionally, but consider an alternate seal or body material if you frequently need to replace the standard check valve on your unit.

Check valve substitutions for new equipment are available at the time of purchase.


Most check valves are available with Viton, EPDM or Kalrez seals and stainless steel or polypropylene bodies.


Common Allowed Fluids

List provided for general reference only.
Consult your chemical supplier to confirm suitability.

EPDM (Santoprene)
  • Potable Water
  • Caustic Alkaline
  • Mild Acids
  • Alcohol
  • Ketones
  • Peracetic Acid (PAA)
Viton (FKM)
  • Strong Acids
  • Solvents
  • D-Limonene
  • Oils
  • Chlorine
  • PAA with less than 15% hydrogen peroxide
Kalrez (FFKM)
  • Ketones
  • Alkaline
  • Alcohol
  • Diluted Acids
  • Chlorine (Best)
  • PAA with more than 15% hydrogen peroxide

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