Ashcroft 100-101 Threaded Diaphragm Seals

The Ashcroft® 100 and 101 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 threaded to top housing
  • Flushing port (type 101) provides easy cleaning/flushing due to process media prone to clogging


  • Style:
    Type 100: threaded 
    Type 101: 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

The 100 and 101 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

Please Contact Us for more detail