205 In-Line Saddle Diaphragm Seals

205 In-Line saddle Diaphragm Seals

The Ashcroft® 205 in-line saddle diaphragm seal or isolation device protects pressure measuring instruments. Mounted astride process piping, it is used to prevent process clogging or accumulation. An ideal choice for satisfying challenging installation requirements.

Key Features:

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


  • Process size: 3" and larger
  • Rated up to 2500 psi

The 205 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