NW32-40-AAR-V
NW40xNW32 Aluminum Adaptive Centering Ring
Viton O'Ring
• NW32 to NW40 (KF32 to KF40)
• Centering Ring Reducing
• NW32xNW40 High Vacuum Hardware
Viton® O-Ring
• Viton (Fluorocarbon FKM)
• 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.
NW40-32-AAR-V Compare to: QF32-40-AARV 100315815 KCA3240AV