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


Viton O-Ring
Price: $22.00
Sale: $8.00
Aluminum Adaptive Ring NW20 to NW25
(NW20-25-AAR-V)


Viton O-Ring
Price: $10.00
Sale: $8.00
Stainless Adaptive Ring NW20 to NW25 <br> (NW20-25-ASR-S)
Aluminum Adaptive Ring NW20 to NW25 <br> (NW20-25-AAR-S)
Stainless Adaptive Ring NW20 to NW25
(NW20-25-ASR-S)


Silicone O-Ring
Price: $14.00
Sale: $9.00
Aluminum Adaptive Ring NW20 to NW25
(NW20-25-AAR-S)


Silicone O-Ring
$9.00
Stainless Adaptive Ring NW20 to NW25 <br> (NW20-25-ASR-B)
Aluminum Adaptive Ring 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: $8.00
Aluminum Adaptive Ring NW20 to NW25
(NW20-25-AAR-B)


Buna-N O-Ring
$8.00
Stainless Adaptive Ring NW20 to NW25 <br> (NW20-25-ASR)
Aluminum Adaptive Ring NW20 to NW25 <br> (NW20-25-AAR)
Stainless Adaptive Ring NW20 to NW25
(NW20-25-ASR)


NO O-Ring
$8.00
Aluminum Adaptive 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