Silicone O-Ring
• Chemical Applications
• 200°C Maximum

Change Your Flange Size With One Centering Ring!

The use of Adapter Centering Rings is simple:
One side of the ring is NW32 and the other NW40.
By using this centering, you CONVERT a
NW32 flange size to a NW40 Flange

NW, KF, QF Series High Vacuum Flanges

NW32 (KF32) OD: 2.18" Centering Ring Counter Bore: 1.34"

NW40 (KF40) OD: 2.18" Centering Ring Counter Bore: 1.62"

NW32 Flanges Are Sometimes Used Overseas (Uncommon)

NW32 (KF32) vacuum flange size is not popular in the US,
but may be necessary to use US flanges.

Aluminum Adaptive Centering Ring
NW32 to NW40
(NW32-40-AAR-S)
NW32-40-AAR-S$12.00