Click to enlargeNW Series Replacement O-Rings
Fits Centering Rings

NW (KF, QF) Replacement O-Rings
Buna-N (Nitrile, NBR): 100°C Maximum
Viton (Fluorocarbon, FKM): 200°C Maximum
Silicone (Chemical Series): 200°C Maximum

ORing Fits NW (KF, QF) Series Centering Rings
NW (KF) Replacement Elastomer Seals

NW (KF) Replacement Buna-N O-Rings
NW (KF) Replacement Silicone O-Rings
NW (KF) Replacement Buna-N O-Rings

100C Maximum

NW (KF) Replacement Silicone O-Rings

200C Maximum

NW (KF) O-Rings Viton (Fluorocarbon, FKM)
NW (KF) O-Rings Viton (Fluorocarbon, FKM)

200C Maximum

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Replacement Elastomer O-Rings

Replacement O-Rings

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Viton® (Fluorocarbon, FKM) O-Ring:
200°C Maximum
• Viton® (Fluorocarbon, FKM)
is normally used in vacuum service. Viton® has a low porosity to most gases and withstands high temperatures up to 200°C for short periods.

Silicone O-Rings:
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.

Buna-N (Nitrile NBR) O-Rings:
100°C Maximum
Also Known As Nitrile (NBR)

• 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.
Viton® is a registered trademark of DuPont Dow Elastomers
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