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The Ashcroft® 300 and 301 threaded diaphragm seals protect pressure measuring instruments. Used when process compatibility is required, these are also applied when media exhibits high temperature or has the potential to clog an instrument connection. Ideal for satisfying many challenging applications.
400 and 401 All-Welded Diaphragm Seals
Unit of Measure
Items 400 and 401 All-Welded Diaphragm Seals
300
300 Threaded Diaphragm Seal 		400 and 401 All-Welded Diaphragm Seals
301
301 Threaded Diaphragm Seal
Description N/A The Ashcroft® 300 threaded diaphragm seals protect pressure measuring instruments. Used when process compatibility is required, these are also applied when media exhibits high temperature or has the potential to clog an instrument connection. Ideal for satisfying many challenging applications. N/A The Ashcroft® 301 threaded diaphragm seals protect pressure measuring instruments. Used when process compatibility is required, these are also applied when media exhibits high temperature or has the potential to clog an instrument connection. Ideal for satisfying many challenging applications.
Brands N/A Ashcroft®
Process Connection Size (National Pipe Thread (NPT) Male) N/A 1/4 to 1 in
Process Connection Size (National Pipe Thread (NPT) Female) N/A 1/4 to 1-1/2 in
Instrument Connection Size N/A 1/2 in1/4 in
Instrument Connection Type N/A National Pipe Thread (NPT) Female
Pressure Rating N/A Up to 2,500 psi
Typical Added Tolerance (±) N/A 0.5 %
Connection Style N/A Threaded N/A Threaded with Flushing Port
Key Features N/A
  • 316L stainless steel top housing (standard)
  • Wide selection of diaphragm and lower housing materials
  • Diaphragm (elastomer) clamped between top and bottom housings
 		N/A
  • 316L stainless steel top housing (standard)
  • Wide selection of diaphragm and lower housing materials
  • Diaphragm (elastomer) clamped between top and bottom housings
  • Flushing port provides easy cleaning/flushing for process media prone to clogging
Applications N/A Process Market:
Oil and Gas
Refineries
Chemical and Petrochemical
Water and Wastewater

Process Applications:
Oil and Gas Fracking
Biogas and Biodiesel