DFE-EN All-Welded Flanged Diaphragm Seal

The Ashcroft® DFE all-welded flanged diaphragm seal uses a diaphragm welded directly to the assembly flange and a light weight flange inlay. 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 materials
  • Diaphragm welded to flange
  • Filling port in the instrument connection
  • Suitable for pressure gauges, switches and transmitters
Specifications:
  • Flange size: DN25 or DN40
  • Flange rating: PN10 to PN40 – class flanges
  • Flange design according to EN 1092-1

The type DFE 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
  • CE
  • GOST
  • NACE
 

Related Products

DFE-ASME All-Welded Flanged Diaphragm Seal

The Ashcroft® DFE all-welded flanged diaphragm seal uses a diaphragm welded directly to the assembly flange and a light weight flange inlay.

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.

302-303 Flanged Diaphragm Seals

The Ashcroft® 302 and 303 diaphragm seals or isolation devices protect pressure measuring instruments.

202-203 Flanged Diaphragm Seals

The Ashcroft® 202 and 203 diaphragm seals or isolation devices protect pressure measuring instruments.

106 In-Line Flanged Diaphragm Seals

The Ashcroft® 106 in-line flanged diaphragm seal or isolation device protects pressure measuring instruments.

402-403 Flanged All-Weld Diaphragm Seals

The Ashcroft® 402 and 403 flanged all-weld diaphragm seals or isolation devices protect pressure measuring instruments.

DF-ASME Flush Flanged Diaphragm Seal

The Ashcroft® DF flush flanged diaphragm seal uses a flush diaphragm welded directly to the assembly flange, eliminating the need for a bulky lower housing.

DT-ASME Truncated Flanged Diaphragm Seal

The Ashcroft® truncated flanged diaphragm seal model DT protects pressure measuring instruments on isolated pipes or tanks.

DF-EN Flush Flanged Diaphragm Seal

The Ashcroft® DF flush flanged diaphragm seal uses a flush diaphragm welded directly to the assembly flange, eliminating the need for a bulky lower housing.

DT-EN Truncated Flanged Diaphragm Seal

The Ashcroft® truncated flanged diaphragm seal model DT protects pressure measuring instruments on isolated pipes or tanks.

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.

Frequently Asked Questions

Get quick answers to common questions. Choose your topic:

See all FAQs »