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100 Threaded Diaphragm Seal
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.
Ashcroft 100-101 Threaded Diaphragm Seals


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
Pressure Rating
Rated up to 2,500 psi, optional 5,000 psi


  • 316L stainless steel top housing (standard)
  • 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
Trust the shield.


Ashcroft's passion is to design, manufacture, and deliver the most innovative and well-crafted pressure and temperature instruments so you can always trust the shield.
Get more information on the 100-101 Threaded Diaphragm Seal from Ashcroft. 
Diaphragm Seal Assembly