Ashcroft Flanged All-Welded Diaphragm Seal, 402/403
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402/403 Flanged All-Welded Diaphragm Seal

Part Number: TYPE 402/TYPE 403 Brand: Ashcroft Inc.
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The Ashcroft 402 and 403 flanged all-weld diaphragm seals or isolation devices protect pressure measuring instruments. Used to ensure process compatibility, they are also applied when process media exhibits high temperature, pulsation or the potential to clog an instrument connection.

An ideal selection for applications needing added product integrity.
Features
  • Recommended for use where clamped joints are not acceptable 
  • Assists in controlling plant emissions by helping prevent potential leakage of hazardous chemicals 
  • Prevents inadvertent disassembly 

Specifications

Brand

Applications

  • Biogas & Biodiesel
  • Chemical & Petrochemical
  • NACE Compliant Processes (Sour Gas Separation)
  • Oil & Gas Applications
  • Oil & Gas Fracking
  • Refineries
  • Water & Wastewater

Approvals & Certifications

  • CRN

Diaphragm Material

  • 316L Stainless Steel
  • Hastelloy® B
  • Hastelloy® C-22
  • Hastelloy® C-276
  • Monel® 400
  • Tantalum
  • Titanium

Enclosure, Body Material

  • 316L Stainless Steel
  • Hastelloy® B
  • Hastelloy® C-22
  • Hastelloy® C-276
  • Monel® 400
  • Titanium

Fill Material

  • Distilled Water
  • Ethylene Glycol & Water
  • Food Grade Silicone
  • Glycerin
  • Halocarbon
  • Propylene Glycol
  • Silicone
  • Syltherm

Flange Material

  • Carbon Steel
  • Stainless Steel

Flange Size - 1-1/2" (DN40)

  • 1-1/2" (DN40) - 150#
  • 1-1/2" (DN40) - 1500#
  • 1-1/2" (DN40) - 300#
  • 1-1/2" (DN40) - 600#
  • 1-1/2" (DN40) - 900#

Flange Size - 1" (DN25)

  • 1" (DN25) - 150#
  • 1" (DN25) - 1500#
  • 1" (DN25) - 300#
  • 1" (DN25) - 600#
  • 1" (DN25) - 900#

Flange Size - 1/2" (DN15)

  • 1/2" (DN15) - 150#
  • 1/2" (DN15) - 1500#
  • 1/2" (DN15) - 300#
  • 1/2" (DN15) - 600#
  • 1/2" (DN15) - 900#

Flange Size - 2" (DN50)

  • 2" (DN50) - 150#
  • 2" (DN50) - 1500#
  • 2" (DN50) - 300#
  • 2" (DN50) - 600#
  • 2" (DN50) - 900#

Flange Size - 3" (DN80)

  • 3" (DN80) - 150#
  • 3" (DN80) - 1500#
  • 3" (DN80) - 300#
  • 3" (DN80) - 600#
  • 3" (DN80) - 900#

Flange Size - 3/4" (DN20)

  • 3/4" (DN20) - 150#
  • 3/4" (DN20) - 1500#
  • 3/4" (DN20) - 300#
  • 3/4" (DN20) - 600#
  • 3/4" (DN20) - 900#

Flange Size - 4" (DN100)

  • 4" (DN100) - 150#
  • 4" (DN100) - 1500#
  • 4" (DN100) - 300#
  • 4" (DN100) - 600#
  • 4" (DN100) - 900#

Flange Type

  • Flat Face (FF)
  • Raised Face (RF)
  • Ring Joint Facing

Maximum System Pressure

  • psi: 20 to 6,170 (kPa: 137.9 to 42,541, bar: 1.38 to 425.4)

NPT Connection

  • Instrument Connection: 1/2" NPT Female
  • Instrument Connection: 1/4" NPT Female

Nut & Bolt Material

  • Clamping Bolt: 300 Stainless Steel, Maximum

Ring Material

  • Clamp & Flanged Rings: Stainless Steel

Temperature Range

  • Filling Fluid: -21° to 398.9° C (-70° to 750° F)

Documentation

Industry Brochures

Product Information

Selection Guides

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