Click to enlargeNW20 to NW25
Adaptive Centering Rings




NW25xNW20 Adaptive Centering Ring
NW20 to NW25 (NWxNW)

• KF20 to KF25 (KF20-KF25)
• QF20 to QF25
• Centering Ring Reducing
• High Vacuum Hardware

NW, KF, QF Series High Vacuum Flanges

NW20 (KF20) OD: 1.57" Centering Ring Counter Bore: 0.86"

NW25 (KF25) OD: 1.57" Centering Ring Counter Bore: 1.03"

NW20 Flanges Are Sometimes Used Overseas (Uncommon)


The use of Adapter Centering Rings is simple:
One side of the ring is NW20 and the other NW25.
By using this centering, you CONVERT a
NW20 flange size to a NW25 Flange

NW20 (KF20) vacuum flange size is not popular in the US,
but may be necessary to use US flanges.

Uses NW25 Series Clamps



Stainless Adaptive Centering Ring <br> NW20 to NW25 <br> (NW20-25-ASR-V)
Aluminum Adaptive Centering Ring <br> NW20 to NW25 <br> (NW20-25-AAR-V)
Stainless Adaptive Centering Ring
NW20 to NW25
(NW20-25-ASR-V)


Viton O-Ring
Price: $22.00
Sale: $8.50
Aluminum Adaptive Centering Ring
NW20 to NW25
(NW20-25-AAR-V)


Viton O-Ring
Price: $10.00
Sale: $8.50
Stainless Adaptive Centering Ring <br> NW20 to NW25 <br> (NW20-25-ASR-S)
Aluminum Adaptive Centering Ring <br> NW20 to NW25 <br> (NW20-25-AAR-S)
Stainless Adaptive Centering Ring
NW20 to NW25
(NW20-25-ASR-S)


Silicone O-Ring
Price: $14.00
Sale: $9.50
Aluminum Adaptive Centering Ring
NW20 to NW25
(NW20-25-AAR-S)


Silicone O-Ring
$9.50
Stainless Adaptive Ring <br> NW20 to NW25 <br> (NW20-25-ASR-B)
Aluminum Adaptive Centering Ring <br> NW20 to NW25 <br> (NW20-25-AAR-B)
Stainless Adaptive Ring
NW20 to NW25
(NW20-25-ASR-B)


Buna-N O-Ring
Price: $17.00
Sale: $8.50
Aluminum Adaptive Centering Ring
NW20 to NW25
(NW20-25-AAR-B)


Buna-N O-Ring
$8.50
Stainless Adaptive Centering Ring <br> NW20 to NW25 <br> (NW20-25-ASR)
Aluminum Adaptive Centering Ring <br> NW20 to NW25 <br> (NW20-25-AAR)
Stainless Adaptive Centering Ring
NW20 to NW25
(NW20-25-ASR)


NO O-Ring
$8.00
Aluminum Adaptive Centering Ring
NW20 to NW25
(NW20-25-AAR)


NO O-Ring
$8.00
Click to enlarge
Click to enlarge
NW25 Clamps, All Types

NW25 O-Rings (All)


**Use NW25 Clamps To Fasten These Rings**
NW25 Series Clamps

Contact LDS Vacuum with any questions:
Phone (407)862-4643 via Fax (407)862-8723 or
info@ldsvacuum.com

LDS Vacuum Products is a 100% woman owned company and
certified Woman Owned Small Business (WOSB)
The logos and/or trademarks appearing on this page are not owned by or registered to LDS but, rather, designate products sold by LDS, and are owned and/or registered to the manufacturers or suppliers of the products.
Viton® is a registered trademark of DuPont Dow Elastomers