Click to enlargeNW50 Replacement Buna O-Ring
A: 0.21"
B: 2.10"

NW50 (KF50) Replacement Buna O'Ring
Fits NW50, QF50, KF50 Centering Rings
Pack of 10 NW50-200-OB Buna-N O-Rings

Buna-N O-Ring:
• 100°C Maximum
Also Known As Nitrile (NBR)
• NW50 (KF50) Replacement Elastomer Seals

NW50 High Vacuum Flange Equivalents
KF50, KF-50, K200, NW-50, QF50, ISO-QF

NW50 Buna-N O-Rings

NW50-200-OB10Price: $52.10Sale: $9.00

Click to enlarge
Click to enlarge
NW50 Series Centering Rings

NW50 O-Rings (All)

Click to enlarge
Click to enlarge
NW50 Series Clamps

All NW50 Hardware

NW50 Flange OD: Ø2.95"

***NW50 Flange Accessories Available Below***
NW50 Centering Rings
NW50 Clamps, All Types
NW50 Plastic Caps

Buna-N O-Ring:
100°C Maximum

• Buna-N is low cost, but their maximum operating temperature of 100°C makes them unacceptable for many high temperature vacuum applications.

Contact LDS Vacuum with any questions:
Phone (407)862-4643 via Fax (407)862-8723 or

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.