200-201 Threaded Diaphragm Seals

The Ashcroft® 200 and 201 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 welded (metallic) or bonded (elastomer) to top housing
  • Flushing port (type 201) provides easy cleaning / flushing due to process media prone to clogging
Specifications:
  • Style:
    Type 200: threaded
    Type 201: threaded with flushing port
  • Process size:
    NPT female: 1/4" to 1 1/2"
    NPT male: 1/4" to 1"
  • Rated up to 172 bar, optional 345 bar

The 200 and 201 diaphragm seals are ideal where process protection is essential:

Process Market:
  • Oil and Gas
  • Refineries
  • Chemical and Petrochemical
  • Water and Wastewater
Process Applications:
  • Oil and Gas Fracking
  • NACE Compliant Processes (Sour Gas Separation)
  • Biogas and Biodiesel
 

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Tools

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  • Materials Selector

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

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