Ashcroft Welded or Bonded Diaphragm Seal, 200 Series
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200 Series Welded or Bonded Diaphragm Seal

Brand: Ashcroft Inc
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Ashcroft Welded or Bonded Diaphragm Seal, 200 Series Ashcroft Welded or Bonded Diaphragm Seal, 200 Series Ashcroft Welded or Bonded Diaphragm Seal, 200 Series Ashcroft Welded or Bonded Diaphragm Seal, 200 Series Ashcroft Welded or Bonded Diaphragm Seal, 200 Series Ashcroft Welded or Bonded Diaphragm Seal, 200 Series
When isolation of the process from an instrument is required, Ashcroft offers a comprehensive line of diaphragm seals. 

Seal types include threaded, flanged, in-line threaded, in-line flanged, in-line socket weld, in-line butt weld, saddle and sanitary seals.

Also available is a complete offering of isolation or iso-rings and isolation or iso-spools.
Features
  • A metal diaphragm is welded to the top housing. Elastomeric diaphragms are bonded to the top housing. Either provides a double positive seal 
  • A fill/bleed connection is standard, which permits filling the seal and instrument simultaneously after evacuation and allows the fill to flow into the completed unit 
  • A thin Teflon PTFE gasket between the diaphragm and bottom housing ensures a leak-tight corrosion resistant seal even at high pressure 
  • Top housing and pressure instrument are removable 
  • Continuous-duty design will prevent loss of process fluid if pressure instrument is removed or fails 

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Specifications

Brand

Flange Size - 6” (DN 150)

  • 6” (DN 150) - 150#
  • 6” (DN 150) - 300#

Flange Size - 2” (DN 50)

  • 2” (DN 50) - 150#
  • 2” (DN 50) - 1500#
  • 2” (DN 50) - 2500#
  • 2” (DN 50) - 300#
  • 2” (DN 50) - 600#
  • 2” (DN 50) - 900#

Diaphragm Material

  • 304 Stainless Steel
  • 316L Stainless Steel
  • Carpenter 20
  • Hastelloy B
  • Hastelloy C-22
  • Hastelloy C-276
  • Kalrez
  • Monel 400
  • Nickel
  • Tantalum
  • Teflon
  • Titanium
  • Viton

Pipe Connection

  • 1” Pipe
  • 1/2” Pipe
  • 1/4” Pipe
  • 1-1/2” Pipe
  • 2” Pipe
  • 3” Pipe (Saddle)
  • 3/4” Pipe
  • 4” Pipe (Saddle)

NPT Connection

  • 1” NPT Female
  • 1/2” NPT Female
  • 1/4” NPT Female
  • 1-1/2” NPT Female
  • 3/4” NPT Female

Flange Type

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

Flange Size - 1-1/2” (DN 40)

  • 1-1/2” (DN 40) - 150#
  • 1-1/2” (DN 40) - 1500#
  • 1-1/2” (DN 40) - 2500#
  • 1-1/2” (DN 40) - 300#
  • 1-1/2” (DN 40) - 600#
  • 1-1/2” (DN 40) - 900#

Flange Size - 3/4” (DN 20)

  • 3/4” (DN 20) - 150#
  • 3/4” (DN 20) - 1500#
  • 3/4” (DN 20) - 2500#
  • 3/4” (DN 20) - 300#
  • 3/4” (DN 20) - 600#
  • 3/4” (DN 20) - 900#

Fill Material

  • Glycerin
  • Halocarbon
  • Silicone
  • Syltherm

Flange Size - 1/2” (DN 15)

  • 1/2” (DN 15) - 150#
  • 1/2” (DN 15) - 1500#
  • 1/2” (DN 15) - 2500#
  • 1/2” (DN 15) - 300#
  • 1/2” (DN 15) - 600#
  • 1/2” (DN 15) - 900#

Enclosure, Body Material

  • 304L Stainless Steel
  • 316L Stainless Steel
  • Carpenter 20
  • Halar Coated Monel
  • Hastelloy B
  • Hastelloy C-22
  • Hastelloy C-276
  • Inconel 600
  • Kynar
  • Monel 400
  • Nickel
  • PVC
  • Steel
  • Tantalum Clad Stainless Steel
  • Teflon Flanged Steel
  • Titanium

Temperature Range

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

Welded Connection

  • 1” Butt Weld End
  • 1” Socket Weld End Female
  • 1/2” Butt Weld End
  • 1/2” Socket Weld End Female
  • 1/4” Butt Weld End
  • 1/4” Socket Weld End Female
  • 1-1/2” Butt Weld End
  • 1-1/2” Socket Weld End Female
  • 2” Butt Weld End
  • 2” Socket Weld End Female
  • 3/4” Butt Weld End
  • 3/4” Socket Weld End Female

Pressure Rating

  • psi: 1,500 (kPa: 10,500, bar: 105)
  • Threaded Inlet & Metal Diaphragm psi: 5,000 (kPa: 34,470, bar: 344.7)

Approvals & Certifications

  • CRN
  • GOST

Flange Size - 8” (DN 200)

  • 8” (DN 200) - 150#

Flange Size - 1” (DN 25)

  • 1” (DN 25) - 150#
  • 1” (DN 25) - 1500#
  • 1” (DN 25) - 2500#
  • 1” (DN 25) - 300#
  • 1” (DN 25) - 600#
  • 1” (DN 25) - 900#

NACE & NIST

  • NACE

Flange Size - 4” (DN 100)

  • 4” (DN 100) - 150#
  • 4” (DN 100) - 300#

Flange Size - 3” (DN 80)

  • 3” (DN 80) - 150#
  • 3” (DN 80) - 1500#
  • 3” (DN 80) - 2500#
  • 3” (DN 80) - 300#
  • 3” (DN 80) - 600#
  • 3” (DN 80) - 900#

  • Biogas & Biodiesel
  • Chemical & Petrochemical
  • Corrosive Service
  • Ease of Cleaning between Batches
  • Elevated Process Temperatures
  • Isolation of the Process for Safety
  • NACE Compliant Processes
  • Oil & Gas Applications
  • Oil & Gas Fracking
  • Refineries
  • Replacement of Process Dead Leg
  • Sanitary Connections
  • Suspended Solids
  • Water & Wastewater

Documentation

Data Sheets

Industry Brochures

Installation & Maintenance

Product Information

Selection Guides

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