Click to enlargeNW25 Mesh Screen Centering Rings

NW25 Mesh Screen Centering Rings
• NW25 (KF25, QF25) 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

NW25 Series Equivalent Names:
KF25, KF-25, K100, NW-25, QF25, ISO-QF, Kwik Flange

NW, KF, QF Series High Vacuum Flanges

NW25 (KF25) OD: 1.57" – Centering Ring Counter Bore: 1.03"





NW25 Mesh Screen Ring Viton O-Ring <BR> NW25-100-SRV-SM
NW25 Mesh Screen Ring Buna O-Ring <BR> NW25-100-SRB-SM
NW25 Mesh Screen Ring Viton O-Ring
NW25-100-SRV-SM

Price: $54.34
Sale: $23.00
NW25 Mesh Screen Ring Buna O-Ring
NW25-100-SRB-SM

Price: $43.47
Sale: $23.00
NW25 Mesh Screen Ring Silicone O-Ring <BR> NW25-100-SRS-SM
NW25 Centering Ring Sintered Metal Filter <br> (NW25-SMF)
NW25 Mesh Screen Ring Silicone O-Ring
NW25-100-SRS-SM

Price: $43.47
Sale: $23.00
NW25 Centering Ring Sintered Metal Filter
(NW25-SMF)

Price: $90.95
Sale: $59.00
Click to enlarge
Click to enlarge
NW25 O-Rings (All)

All NW25 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
Images Shown May Be For Reference Only