4-Way KF (QF) Reducer Crosses We fabricate these KF (QF) crosses for HV systems from tubing and KF flanges. The KF (QF) flange is used for through- or foreline vacuum plumbing and for simple HV chamber ports. KF Crosses Feature: - Available in 304L stainless steel or aluminum (4-way standard crosses only)
- Reducer crosses adapt two different flange sizes
- Common lengths and tube diameters listed; contact us with your specific requirements
NOTE: These flanges are identical to the ISO NW flange standard. While these flanges are compatible with those made by European manufacturers, the tube diameter listed is in inches. Flange Size | Flange Type | Dim A | Dim B | Weight lbs (kg) | PartNo | Price | | | | KF25/KF16 | Stainless Steel | 1.97" | 1.70" | 3/4 (0.34) | QF25X16X | $114.00 | | | | KF40/KF16 | Stainless Steel | 2.56" | 1.95" | 1 (0.45) | QF40X16X | $150.00 | | | | KF40/KF25 | Stainless Steel | 2.56" | 2.22" | 1 (0.45) | QF40X25X | $160.00 | | | | KF50/KF16 | Stainless Steel | 2.75" | 2.20" | 1-1/2 (0.68) | QF50X16X | $205.00 | | | | KF50/KF25 | Stainless Steel | 2.75" | 2.47" | 1-1/2 (0.68) | QF50X25X | $210.00 | | | | KF50/KF40 | Stainless Steel | 2.75" | 2.81" | 2 (0.9) | QF50X40X | $235.00 | | | |