Type 300 Clamped Diaphragm Seal - OVERVIEW

Type 300 Clamped Diaphragm Seal - OVERVIEW

by Ashcroft

The Ashcroft® 300 and 301 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 (elastomer) clamped between top and bottom housings
  • Flushing port (type 301) provides easy cleaning / flushing due to process media prone to clogging


  • Style:       
    Type 300 (threaded)       
    Type 301 (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