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300 Series Clamped Diaphragm Seal
Brand: Ashcroft IncThe 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
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
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
Industry Brochures
Installation & Maintenance
Product Information
- Attaching 2 1/2" and 3 1/2" 1009 Gauges to Diaphragm Seals pdf 817 KB
- Attaching 2 S/2" and 3 S/2" 300 Gauges Viton Volumetric Seals pdf 1.0 MB
- Attaching Diaphragm Seals to Low Pressure Gauges pdf 1,008 KB
- Chlorine, Bromine and Fluorine Recommended Diaphragm Materials pdf 1.1 MB
- Diaphragm Seal with Dampening Device pdf 664 KB
- Diaphragm Seal with Vacuum Gauge pdf 663 KB
- Failure and Corrective Steps for Diaphragm Seals pdf 668 KB
- High Temperature Fill Fluid pdf 668 KB
- Instruments Not Available with Diaphragm Seals pdf 668 KB
- Low Volume Tee Fitting for Instrument Assemblies pdf 443 KB
- Minimum, Maximum and Pressures Recommended Diaphragm Materials pdf 651 KB
- Temperature Error pdf 1.8 MB
- Volumetric Displacement pdf 2.4 MB
- Volumetric Displacement Type 300 Teflon Diaphragm Seal pdf 2.4 MB