400-401 All-Welded Diaphragm Seals

The Ashcroft^® 400 and 401 all-welded diaphragm seals or isolation devices protect pressure measuring instruments. Used to ensure process compatibility, they are also applied when process media exhibits high temperature, pulsation or the potential to clog an instrument connection. An ideal selection for applications needing added product integrity.

Key Features:

• Select diaphragm and lower housing materials
  
• All-welded construction
  
• Carbon steel rings (standard); 300 stainless steel rings (optional)
  
• Pressure rated up to 320 bar; optional high-pressure rings to
  600 bar (type 401: 345 bar ) 
  
• Flush port (type 401) provides easy cleaning / flushing due to process
  media prone to clogging

Specifications:

• Style:
  Type 400: threaded
  Type 401: threaded with flushing port
  
• Process size:
  Type 400: 1/4" to 1" NPT female;  1/4" to 3/4" NPT male
  Type 401: 1/4" to 1" NPT female