Data Sheet

The Ashcroft® 702 and 703 high-displacement diaphragm seals or isolation devices are used with low pressure or differential pressure gauges with low differential pressure and elevated static pressure. Used to ensure material compatibility, they are also applied when process media exhibits high temperature, pulsation or the potential to clog an instrument connection. An ideal product for satisfying low pressure measurement needs.

Key Features:

• Wide selection of diaphragm and lower housing materials
  
• Enlarged welded diaphragm; high displacement allows high sensitivity to pressure fluctuations 
  
• Flushing port (type 703) provides easy cleaning / flushing due to process media prone to clogging

Specifications:

• Style:
  Type 702: raised face flange
  Type 703: raised face flange with flushing port
  
• Process size: 1/2" to 3"
  
• Flange rating: 150 and 300 class

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Data Sheet

740-741 High-Displacement Diaphragm Seals

The Ashcroft® 740 and 741 high-displacement diaphragm seals or isolation devices are used with low-ranged instruments or high static pressure dp gauges with low differential pressure. Used to ensure material compatibility, they are also applied when process media exhibits high temperature, pulsation or the potential to clog an instrument connection. An ideal product for satisfying low pressure measurement needs.

Key Features:

• Wide selection of diaphragm and lower housing materials
  
• Enlarged welded diaphragm; high displacement allows high sensitivity to 
  pressure fluctuations 
  
• Flush port (type 741) provides easy cleaning / flushing due to process 
  media prone to clogging

Specifications:

• Style:
  Type 740: threaded
  Type 741: threaded with flushing port
  
• Low pressure range capability; 30" IWC to 750 psi
  
• Process size: 1/4" to 1" NPT female
  
• Rated up to 750 psi

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