Ashcroft DF Flush Flanged Diaphragm Seal

The Ashcroft® DF flush flanged diaphragm seal uses a diaphragm welded directly to the assembly flange, eliminating much of the cost associated with bulky lower housings made from exotic and expensive wetted materials. The flush-mounted diaphragm prevents clogging and is available in a full range of metallic and coated materials. 

Key Features:

  • Flush design minimizes the use of expensive specialty wetted materials
  • Flush-mounted diaphragm prevents clogging of process media


  • Style: DF (flush)
  • Process size: 1" to 4" flanged
  • Flange Rating: 150RF to 2500RF

The DF flush flanged diaphragm seals are ideal where process protection is essential:

Process Market

  • Oil and Gas
  • Refineries
  • Chemical and Petrochemical
  • Water and Wastewater

Process Applications

  • Oil and Gas Fracking
  • NACE Compliant Processes
  • Biogas and Diesel

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