702-703 Flanged High Displacement Diaphragm Seals

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
  • Low pressure range capability:
    Bellows gauges: 75 mbar and above
    Differential pressure gauges F5503: 0,6 bar and above
  • Process size: 1/2″ to 3″
  • Flange rating: 150, 300 and 600 class

The 702 and 703 diaphragm seals are ideal where low pressure measurement and process protection are essential:

Process Market:
  • Oil and Gas
  • Refineries
  • Chemical and Petrochemical
  • Water and Wastewater
Process Applications:
  • Oil and Gas Racking
  • NACE Compliant Processes (Sour Gas Separation)
  • Bioassay and Biocides
 

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Tools

  • Distributor Locator

    Locate an authorized Ashcroft distributor in your area.
  • Materials Selector

    Use the selector to review compatible wetted materials and requirements of your application.
  • Unit Convertor

    Need to convert measurement units? Check out our quick and easy approach to pressure, temperature and flow unit conversions.

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