O-ring Size of Old Type 4” Non Locking Version Flange

[Matt_D]

This may be the information you are looking for:

What is the difference between the old O-Ring sets and the new ones?

Hi @Alex_UJI1, The non-locking 4" enclosure flanges use AS568-154 o-rings for the face seal and AS568-238 O-rings for the radial seals - the remaining spares of which are available here. The precision machined tube ends of the locking enclosures mean the flange needs to be wider, but also that the tolerance between the tube and the flange is tighter, so the radial o-rings have a larger diameter but a smaller cross-section. The new locking 4" enclosure flanges use AS568-154 o-rings for both the…