Type 200 Series Welded or Bonded Diaphragm Seal - OVERVIEW

by Ashcroft

The Ashcroft® 200 and 201 threaded diaphragm seals or isolation devices protect pressure measuring instruments. Used when process compatibility is required, these are also applied when media exhibits high temperature or the potential to clog an instrument connection. Ideal for satisfying many challenging applications.

Key Features:

  • Wide selection of diaphragm and lower housing materials
  • Diaphragm welded (metallic) or bonded (elastomer) to top housing
  • Flushing port (type 201) provides easy cleaning / flushing due to process media prone to clogging


  • Style:
    Type 200: threaded
    Type 201: threaded with flushing port
  • Process size:
    NPT female: 1/4" to 1 1/2"
    NPT male: 1/4" to 1"
  • Rated up to 2,500 psi, optional 5000psi