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 or G female: 1/4″ to 1 1/2″
    NPT male or G 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
  • ATEX
  • CRN
  • GOST
  • NACE
 

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311-312 Midi-Diaphragm Seals

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400-401 All-Welded Diaphragm Seals

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100-101 Threaded Diaphragm Seals

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310-315 Mini-Diaphragm Seals

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500-501 All-Welded Diaphragm Seals

The Ashcroft® 500 and 501 all-welded diaphragm seals or isolation devices protect pressure measuring instruments.

300-301 Threaded Diaphragm Seals

The Ashcroft® 300 threaded diaphragm seals or isolation devices protect pressure measuring instruments.

330 All-Welded Flush Mini Diaphragm Seals

The Ashcroft® 330 all-welded flush mini-diaphragm seal or isolation device protect pressure measuring instruments.

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.

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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