NW50 Mesh Screen Centering Rings

NW50 Mesh Screen Centering Rings
• NW50 (KF50, QF50) Series
• Centering Ring Assembly with Screen
• 304 Stainless

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

NW50 Series Equivalent Names:
• KF50, KF-50, NW-50, QF50, Kwik Flange

NW, KF, QF Series High Vacuum Flanges

NW50 (KF50) OD: 2.95" – Centering Ring Counter Bore: 2.06"



NW50 Mesh Screen Ring Viton O-Ring (NW50-200-SRV-SM) Price: $48.39 Sale: $35.00		NW50 Mesh Screen Ring Silicone O-Ring (NW50-200-SRS-SM) Price: $40.00 Sale: $35.00



NW50 Mesh Screen Ring Buna O-Ring (NW50-200-SRB-SM) Price: $40.00 Sale: $35.00		All NW50 Hardware

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
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
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