DIMENSIONS in [ ] are millimeters

For reference only, consult Ashcroft for specific dimensional drawings

A

TYPE 311 MIDI-SEAL

MALE NPT PROCESS CONNECTION

C

B

TYPE 311 & 312 MIDI-SEAL – THREADED

(with and without flushing connection)

C

D

A

B

Bottom of Housing

to C of 1/8 NPT

Flushing Port

(Type 312 only)

L

Model

A

B

C

D

311/312

2 [51]

2.65 [67]

0.94 [24]

0.94 [24]

311

(male connection)

2 [51]

13⁄8 [35]

1¾ [44]

-

311/312 MIDI DIAPHRAGM SEAL -THREADED

(WITH & WITHOUT FLUSHING CONNECTION)

311MIDI DIAPHRAGM SEAL -THREADED

MALE PROCESS CONNECTION

All specifications are subject to change without notice.

All sales subject to standard terms and conditions.

©2019 Ashcroft Inc. 311-312_midi_ds1.0, Rev. A, 04/19

ashcroft.com

info@ashcroft.com

1.800.328.8258

4 of 4

311/312 All-Welded Midi Threaded Seals

Data Sheet