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702/703 & 740/741 High Displacement Diaphragm Seal
Brand: Ashcroft IncThe Ashcroft 702 and 703 high-displacement diaphragm seals or isolation devices are used with low pressure or differential pressure gauges with low differential pressure and elevated static pressure.
Used to ensure material compatibility, they are also applied when process media exhibits high temperature, pulsation or the potential to clog an instrument connection.
An ideal product for satisfying low pressure measurement needs.
Features- For pressure instruments ranging from 30" H2O to 750 psi
- Used in instruments with large displacement actuators
- For applications requiring an impermeable metallic diaphragm
- Available in many material combinations
- Diaphragm electron beam welded to isolator body
- Furnished with fill/bleed connection
Specifications
Brand
Flange Size - 2-1/2” (DN 65)
- 2-1/2” (DN 65) - 150# ASME B16.5
- 2-1/2” (DN 65) - 300# ASME B16.5
- 2-1/2” (DN 65) - 600# ASME B16.5
Fill Material
- Glycerin
- Halocarbon
- Silicone
- Syltherm
Approvals & Certifications
- CRN
Pressure Rating
- Inches WC: 0 to 30
- psi: 750 (kPa: 5,171, bar: 51.71)
Enclosure, Body Material
- 316L Stainless Steel
- Bottom: Carpenter 20
- Bottom: Hastelloy B
- Bottom: Hastelloy C-276
- Bottom: Tantalum
- Monel
- Titanium
Flange Size - 3/4” (DN 20)
- 3/4” (DN 20) - 150# ASME B16.5
- 3/4” (DN 20) - 300# ASME B16.5
- 3/4” (DN 20) - 600# ASME B16.5
Flange Type
- Flat Face (FF)
- Ring Joint Facing
Flange Size - 2” (DN 50)
- 2” (DN 50) - 150# ASME B16.5
- 2” (DN 50) - 300# ASME B16.5
- 2” (DN 50) - 600# ASME B16.5
Diaphragm Material
- 316L Stainless Steel
- Hastelloy B
- Hastelloy C-276
- K-Monel
- Tantalum
- Titanium
NACE & NIST
- NACE
Flange Size - 3” (DN 80)
- 3” (DN 80) - 150# ASME B16.5
- 3” (DN 80) - 300# ASME B16.5
- 3” (DN 80) - 600# ASME B16.5
Flange Size - 1” (DN 25)
- 1” (DN 25) - 150# ASME B16.5
- 1” (DN 25) - 300# ASME B16.5
- 1” (DN 25) - 600# ASME B16.5
NPT Connection
- 1” NPT Female
- 1/2” NPT Female
- 1/4” NPT Female
- 3/4” NPT Female
Flange Size - 1-1/2” (DN 40)
- 1-1/2” (DN 40) - 150# ASME B16.5
- 1-1/2” (DN 40) - 300# ASME B16.5
- 1-1/2” (DN 40) - 600# ASME B16.5
Flange Size - 1/2” (DN 15)
- 1/2” (DN 15) - 150# ASME B16.5
- 1/2” (DN 15) - 300# ASME B16.5
- 1/2” (DN 15) - 600# ASME B16.5
- Biogas & Biodiesel
- Chemical & Petrochemical
- NACE Compliant Processes (Sour Gas Separation)
- Oil & Gas Applications
- Oil & Gas Fracking
- Refineries
- Water & Wastewater
