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311-312 Midi-Diaphragm Seal
Brand: Ashcroft IncDoes not ship to OH, United States
The Ashcroft® 311 and 312 midi-diaphragm seals are fitted in confined areas to protect measuring instruments.
Used to ensure process compatibility, they are also applied when process media exhibit pulsation.
Ideal for limited space installations.
Features- Compact and lightweight design
- Choice of diaphragm and lower housing materials
- All-welded construction
- Volumetric displacement allows attachment to:
- 3-1/2″ gauges (Vac to 1,000 psi)
- 4-1/2″ gauges (30 to 1,000 psi)
- Transducers and Switches
- Rated up to 1,000 psi
Specifications
Brand
Approvals & Certifications
- CRN
- GOST
- NACE
Process Connection
- 311: 1/4" to 1" NPT Male or Female
- 312: 1/4" or 1/2" NPT Female
Instrument Connection
- 1/4" or 1/2" NPT Female
Connection Style
- 311: All-Welded
- 312: All-Welded with flushing connection
Bottom Housing Material
- 316L Stainless Steel
- Hastelloy C-276
Top Housing Material
- 316L Stainless Steel
Diaphragm Material
- 316L Stainless Steel
- Hastelloy C-276
- Tantalum
Pressure Rating
- 1,000 psi
Added Tolerance
- ±0.5% Typical
Fill Material
- Glycerin
- Halocarbon 4.2
- Silicone
- Syltherm 800 or XLT
- Calflo® AF
- Mineral Oil
- Neobee® M-20 (food grade)
- Distilled Water
- 50/50 Glycerin/Water
- Propylene Glycol
- Ethylene Glycol
- 50/50 Ethylene Glycol/Water
- 80/20 Glycerin/Water
- 95/5 Water/Propylene Glycol
- Process Market:
- Oil & Gas
- Refineries
- Chemical & Petrochemical
- Water & Wastewater
- Process Applications:
- Oil & Gas Fracking
- NACE Compliant Processes (Sour Gas Separation)
- Biogas & Biodiesel
