207 In-Line Socket Weld Diaphragm Seals

207 In-Line Socket Weld Diaphragm Seals

The Ashcroft® 207 in-line socket-weld diaphragm seal or isolation device protects pressure measuring instruments. Mounted in-line to the process piping, it is used on applications where continuous flow prevents process clogging or accumulation, while preventing process fluid loss in the event the measuring instrument is removed or fails. An ideal model for satisfying installation requirements.

Key Features:

  • Wide selection of diaphragm and lower housing materials
  • Diaphragm welded (metallic) or bonded (elastomer) to top housing


  • Process size: 1/4" to 2"
  • Rated up to 2500 psi

The 207 in-line 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 (Sour Gas Separation)
  • Biogas and Biodiesel
  • CRN
  • GOST
  • NACE
  • Cleaned for Gaseous Oxygen
  • Hydrostatic / Pneumatic Test
  • Mass Spectrometer Leak Test
  • Positive Material Identification (PMI)
  • Typical Material Certification