Huntington Stainless 90° Elbow DN50KF NW-50 Vacuum Flange w/ 1/8" NPT

Huntington Stainless 90° Elbow DN50KF NW-50 Vacuum Flange w/ 1/8" NPT Feedthrough

This Huntington Mechanical Labs stainless steel 90-degree radius elbow is a DN50KF (NW-50) vacuum flange fitting with an integrated 1/8" female NPT electrical feedthrough port welded into the elbow body. It is designed for use in high-vacuum plumbing runs where a 90-degree direction change is needed between two DN50KF-flanged components, and where an electrical or instrumentation signal must pass through the vacuum boundary via the NPT feedthrough port.

Specifications & What's Included

• Brand: Huntington Mechanical Labs — Mt. View, CA — Made in USA
• Flange standard: DN50KF / NW-50 (ISO-KF quick-flange)
• Elbow angle: 90 degrees (radius elbow)
• Flange outer diameter (OD): 75 mm
• Tube inner diameter (bore ID): 52 mm
• Tube inner bore: 47 mm
• Body material: Stainless steel
• Feedthrough port: 1/8" female NPT, welded into elbow body
• Feedthrough type: Electrical / instrumentation feedthrough port
• Both DN50KF flange faces present and intact
• No additional accessories, centering rings, or clamps included

Applications

DN50KF (NW-50) radius elbows are standard fittings in high-vacuum and ultra-high-vacuum (UHV) systems, used wherever the vacuum plumbing must turn a corner between pumps, chambers, gauges, valves, or other vacuum components. The ISO-KF quick-flange standard — also known as KF, QF, or NW — is one of the most widely used vacuum flange systems in laboratory and industrial vacuum equipment, and DN50KF is among the larger sizes in that family, commonly found on diffusion pumps, turbomolecular pumps, and vacuum chamber ports. The integrated 1/8" NPT feedthrough port on this elbow allows an electrical wire, thermocouple, or sensor lead to pass through the vacuum wall without breaking the seal — a practical feature that eliminates the need for a separate feedthrough tee or cross fitting. These types of fittings are found in semiconductor processing equipment, thin-film deposition systems (CVD, PVD, sputtering), surface science research chambers, mass spectrometry setups, electron microscopy columns, and general vacuum research and industrial applications. Huntington Mechanical Labs is a well-regarded US manufacturer of vacuum hardware with a long history of supplying the research and semiconductor industries.