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PTFE Diaphragms

ASEPCO’s PTFE Diaphragms

Introducing Polytetrafluoroethylene (PTFE) diaphragms in our exceptional
Weirless Radial-Diaphragm™ Valve design!

PTFE DiaphragmFeatures & BenefitsSpecificationsDatasheet & Resources
Image of 4 PTFE Diaphragms
Polytetrafluoroethylene (PTFE) is a thermoplastic resin that is practically resistant to all fluids. Of all our diaphragm materials, it is the most chemically resistant. PTFE is non-elastic, limiting its use in certain applications. PTFE can be used with media reaching very high temperatures up to 260° Celsius. Currently, PTFE is only available for ASEPCO’s tank valves. To get specific chemical compatibility information about PTFE, we suggest that you refer to the Cole-Parmer Chemical Compatibility Database. To get more information about PTFE, look at some of the suggested resources on the Datasheet & Resources tab.

Benefits of this material:

  • Extremely chemically resistant—often used with heptane and methyl chloride
  • Extremely heat resistant (recommended for 39 to 500°F / 4 to 260°C)
  • Extremely steam resistant

Weaknesses of this material:

  • Not really an elastomer—it has cold flow issues that can result in leaking
  • It is expensive
  • It is harder to work with during maintenance
Cutview of tank valve with PTFE diaphragm and pointers
  • All diaphragms meet USP VI standards and are FDA CFR 177.2600 compliant
  • Meets the standards for quality, purity, lack of toxicity, strength, and consistency
  • Two seals formed with valve body
  • Suitable for biomedical/pharma applications
  • Minimizes contamination and dead legs
ASEPCO provides diaphragms created with a number of different materials. The materials vary with respect to heat-resistance, chemical-resistance, and durability. The table below shows basic compatibility information. Please do not use this information as your sole method for determining whether an elastomer is right for your specific process. Before using any elastomer in a process you should verify its compatibility with an elastomer expert.
Diaphragm specifications and availability tables
For a printable version of this web page that includes the product information, features & benefits, specifications, and illustrations, download the PDF.

pdf-download-icon ASEPCO Diaphragms Datasheet


We specialize in customization. Please contact our Customer Service Department for any non-standard product requirement (800) 882-3886.