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200 Series Welded or Bonded Diaphragm Seal

Brand: Ashcroft Inc
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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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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#
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Applications

  • 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
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