Ashcroft Clamped Diaphragm Seal, 300 Series
Images are representations only.

300 Series Clamped Diaphragm Seal

Brand: Ashcroft Inc

The Ashcroft® 300 and 301 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.
Features
  • An elastomeric or teflon diaphragm is clamped securely between the top and bottom housing with clamp rings, ensuring a 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 
  • Available Teflon diaphragm offers corrosion resistance to most acids, caustics, alkalies, keytones, hydrocarbons and alcohols 
  • Available viton or kalrez diaphragms for low pressure instruments from 10 inches of water 
  • Rugged, flexible and fatigue resistant for superior service life 
  • Continuous-duty design will prevent loss of process fluid if pressure instrument is removed or fails 

Size

Size

Process Connection

Process Connection
  • view details

Diaphragm Material

Diaphragm Material

Housing Material

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

Instrument Connections

Instrument Connections

Filling Fluid

Filling Fluid

Housing

Housing

Ring

Ring
  • view details

Bolts

Bolts
  • view details

Plug

Plug

Pressure Rating

Pressure Rating

Instrument Assembly

Instrument Assembly

Connection

Connection

Flange Type

Flange Type

Cleaning Service

Cleaning Service
View Details
Part Number / SKU

25300TB02TCG

  • Size

    1/4”

  • Process Connection

    Threaded-Female NPT

  • Diaphragm Material

    Teflon

  • Housing Material

    Steel

  • Instrument Connections

    1/4” NPT

  • Filling Fluid

    Glycerin

  • Housing

    Standard

  • Ring

    Teflon

  • Bolts

    Standard

  • Plug

    Without Pipe Plug

  • Pressure Rating

    Standard

  • Instrument Assembly

    Standard

  • Connection

    Standard Flushing Connection

  • Flange Type

    Standard

  • Cleaning Service

    Without Cleaning Service

Specifications

Brand

Ring Material

  • Flanged Ring: 300 Stainless Steel

Nut & Bolt Material

  • Clamping Bolt: 300 Series Stainless Steel

Flange Size - 1/2” (DN 15)

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

Approvals & Certifications

  • CRN - Canadian Registration Number

Flange Type

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

Enclosure, Body Material

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

Flange Size - 3” (DN 80)

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

Flange Size - 1-1/2” (DN 40)

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

Flange Size - 2” (DN 50)

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

Flange Size - 3/4” (DN 20)

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

NPT Connection

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

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#

Diaphragm Material

  • Kalrez
  • Teflon
  • Viton

Fill Material

  • Glycerin
  • Halocarbon
  • Silicone
  • Syltherm

  • Biogas & Biodiesel
  • Chemical & Petrochemical
  • Corrosive Service
  • Ease of Cleaning between Batches
  • Elevated Process Temperatures
  • Isolation of the Process for Safety
  • NACE Compliant Processes (Sour Gas Separation)
  • 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

show more