Click to enlarge

NW50 Replacement Silicone O-Ring
A: 0.21"
B: 2.10"

NW50 (KF50) Replacement Silicone O'Ring
Fits NW50, KF50, QF50 Centering Rings

Silicone O-Ring:
• 200°C Maximum
• Used for Chemical Applications
• NW50 (KF50) Replacement Elastomer Seal

NW50 High Vacuum Flange Equivalents
KF50, KF-50, K200, NW-50, QF50, ISO-QF
NW50-200-OS Compare to: NW-50-OR-S QF50-200-OS O-S330 200 degrees P103655

NW50 Silicone O-Ring

NW50-200-OSPrice: $20.00Sale: $2.00

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

Silicone O-Ring:
200°C Maximum
Chemical Applications

Silicone is used in chemical applications and can withstand temperatures of 200°C for short periods, but silicone tends to harden to prolonged high temperature service, sticking to the metal surfaces and making the o-ring difficult to be replaced. Silicone is also very porous to helium.

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.