Ashcroft, Inc. - 311 and 312 Midi-Diaphragm Seals

Unit of Measure

Items	311 311 Midi-Diaphragm Seal	312 312 Midi-Diaphragm Seal
Description	N/A The Ashcroft® 311 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.	N/A The Ashcroft® 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.
Brands	N/A Ashcroft®
Process Connection Size	N/A 1/4 to 1 in. National Pipe Thread (NPT) Male or Female	N/A 1/4 or 1/2 in. National Pipe Thread (NPT) Female
Instrument Connection Size	N/A 1/2 in1/4 in
Instrument Connection Type	N/A National Pipe Thread (NPT) Female
Pressure Rating	N/A 1,000 psi
Typical Added Tolerance (±)	N/A 0.5 %
Connection Style	N/A All-Welded	N/A All-Welded with Flushing Connection
Key Features	N/A Compact and lightweight design Choice of diaphragm and lower housing materials All-welded construction Volumetric displacement allows attachment to: 3 1/2 in gauges (Vacuum to 1,000 psi), 4 1/2 in gauges (30 to 1,000 psi), Transducers and Switches Rated up to 1,000 psi
Applications	N/A Process Market: Oil and Gas Refineries Chemical and Petrochemical Water and Wastewater Process Applications: Oil and Gas Fracking NACE Compliant Processes (Sour Gas Separation) Biogas and Biodiesel