Replacement O-Rings (Silicone) These replacement elastomeric o-rings are used (in conjunction with a centering ring -- not included) for sealing KF flanges. The KF (QF) flange is used for through- or foreline vacuum plumbing and for simple HV chamber ports. O-Rings Feature: - O-Rings available in Viton (fluorocarbon), Buna-N (nitrile rubber), and silicone materials
- The more popular o-ring sizes for vacuum use are listed below; contact us for other sizes or for application questions
| Flange OD | Material | O-Ring ID | O-Ring Cross Section | Weight lbs (kg) | PartNo | Price | | | | KF10 | Silicone | 0.60" | 0.210" | 1/4 (0.11) | O-S312 | $2.90 | | | | KF16 | Silicone | 0.72" | 0.210" | 1/4 (0.11) | O-S314 | $3.55 | | | | KF25 | Silicone | 1.10" | 0.210" | 1/4 (0.11) | O-S320 | $4.75 | | | | KF40 | Silicone | 1.60" | 0.210" | 1/4 (0.11) | O-S326 | $5.80 | | | | KF50 | Silicone | 2.10" | 0.210" | 1/4 (0.11) | O-S330 | $9.90 | | | |