180° KF (QF) Returns We fabricate these KF (QF) elbows 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 Elbows Feature: - Available in 304L stainless steel or aluminum (miter elbows only)
- Radius or miter design
- 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 | | | | KF16 | Stainless Steel | 1.67" | 2.25" | 1 (0.45) | QF16-075E180 | $67.00 | | | | KF25 | Stainless Steel | 2.17" | 3.00" | 1 (0.45) | QF25-100E180 | $73.00 | | | | KF40 | Stainless Steel | 3.17" | 4.50" | 1 (0.45) | QF40-150E180 | $93.00 | | | | KF50 | Stainless Steel | 4.17" | 6.00" | 1-1/2 (0.68) | QF50-200E180 | $124.00 | | | |