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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.
311 and 312 Midi-Diaphragm Seals
Unit of Measure
1 

Item #

Item Name

Instrument Connection Size

Pressure Rating

Typical Added Tolerance (±)

Connection Style

311 N/A 311 Midi-Diaphragm Seal N/A 1/2 in1/4 in N/A 1,000 psi N/A 0.5 % N/A All-Welded
312 N/A 312 Midi-Diaphragm Seal N/A 1/2 in1/4 in N/A 1,000 psi N/A 0.5 % N/A All-Welded with Flushing Connection
Unit of Measure
1