Introduction
KF (QF) to ASA Adapters—Flat & Grooved provide a practical, leak-tight transition between KF/QF (NW) quick-clamp vacuum lines and ASA-style connections. These adapters are widely used in high-vacuum (HV) systems where modular KF plumbing must interface with ASA components, enabling flexible system design without sacrificing cleanliness or sealing reliability.
Detailed Description
Designed to recognized KF/QF and ASA dimensional standards, these adapters allow fast integration using standard KF clamps, centering rings, and elastomer O-rings on the KF side, while maintaining a stable ASA interface on the opposite end.
Two face configurations are available to match different assembly preferences and operating practices:
Flat Face: Offers a smooth sealing surface that simplifies cleaning and inspection. Ideal for applications prioritizing ease of maintenance and minimal surface features.
Grooved Face: Incorporates a precision groove to help retain and position the gasket during assembly, reducing the risk of misalignment in repetitive or high-throughput setups.
Manufactured from vacuum-grade stainless steel (typically 304 or 316L), these adapters feature smooth internal bores to minimize turbulence, particle generation, and outgassing. Optional electropolishing can further enhance surface cleanliness for sensitive vacuum processes.
Applications
High-vacuum piping and modular manifolds
Thin film deposition systems (PVD, sputtering, evaporation)
Semiconductor process tools and R&D chambers
Analytical instruments and vacuum diagnostics
Laboratory and pilot-scale vacuum systems
Technical Parameters
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Material | Stainless Steel 304 / 316L | Corrosion resistance, low outgassing |
| KF (QF) Sizes | KF16, KF25, KF40, KF50 | Compatibility with standard KF lines |
| ASA Sizes | ASA standard sizes (custom available) | System interface matching |
| Face Type | Flat or Grooved | Affects gasket retention & assembly |
| Sealing Method | O-ring with centering ring (KF side) | Reliable HV sealing |
| Vacuum Range | Up to ~10⁻⁷ mbar (typical) | Suitable for HV systems |
Comparison with Related Adapters
| Adapter Type | Key Advantage | Typical Application |
|---|---|---|
| KF (QF) to ASA Adapter—Flat & Grooved | Fast KF connection to ASA hardware | Modular HV systems |
| KF to CF Adapter | UHV metal gasket sealing | UHV interfaces |
| All-KF Adapter | Full quick-clamp modularity | Frequently reconfigured lines |
FAQ
| Question | Answer |
|---|---|
| Are KF, QF, and NW the same standard? | Yes, they refer to the same standardized quick-clamp system. |
| Which face type should I choose? | Flat for easy cleaning; grooved for better gasket positioning. |
| Are O-rings and clamps included? | Typically supplied separately unless ordered as a kit. |
| Is this suitable for UHV systems? | Primarily for HV; CF adapters are recommended for UHV. |
| Can custom sizes or finishes be provided? | Yes, dimensions and surface finishes can be customized. |
Packaging
Our KF (QF) to ASA Adapters—Flat & Grooved are cleaned for vacuum service, capped on sealing surfaces, and individually packed. Protective foam and export-grade cartons are used to prevent damage and contamination during storage and transportation.
Conclusion
KF (QF) to ASA Adapters—Flat & Grooved deliver a reliable, flexible solution for connecting KF/QF vacuum lines to ASA interfaces. With precise machining, multiple face options, and customization support, they integrate seamlessly into both laboratory and industrial high-vacuum systems.
For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.
Ordering Table
| Flange Size/OD | Type | Drawing | Nominal Tube OD | Part Number |
| ASA 1 (4.25" OD) | Flat |
| 3/4 | QF16XASA4 |
| ASA 1 (4.25" OD) | Grooved |
| 3/4 | QF16XASA4G |
| ASA 1.5 (5.00" OD) | Flat |
| 3/4 | QF16XASA5 |
| ASA 2 (6.00" OD) | Flat |
| 3/4 | QF16XASA6 |
| ASA 6 (11.00" OD) | Flat |
| 1 | QF25XASA11 |
| ASA 6 (11.00" OD) | Grooved |
| 1 | QF25XASA11G |
| ASA 2 (6.00" OD) | Flat |
| 1 | QF25XASA6 |
| ASA 2 (6.00" OD) | Grooved |
| 1 | QF25XASA6G |
| ASA 3 (7.50" OD) | Flat |
| 1 | QF25XASA7 |
| ASA 3 (7.50" OD) | Grooved |
| 1 | QF25XASA7G |
| ASA 4 (9.00" OD) | Flat |
| 1 | QF25XASA9 |
| ASA 4 (9.00" OD) | Grooved |
| 1 | QF25XASA9G |
| ASA 6 (11.00" OD) | Flat |
| 1-1/2 | QF40XASA11 |
| ASA 6 (11.00" OD) | Grooved |
| 1-1/2 | QF40XASA11G |
| ASA 1.5 (5.00" OD) | Flat |
| 1-1/2 | QF40XASA5 |
| ASA 1.5 (5.00" OD) | Grooved |
| 1-1/2 | QF40XASA5G |
| ASA 2 (6.00" OD) | Flat |
| 1-1/2 | QF40XASA6 |
| ASA 2 (6.00" OD) | Grooved |
| 1-1/2 | QF40XASA6G |
| ASA 3 (7.50" OD) | Flat |
| 1-1/2 | QF40XASA7 |
| ASA 3 (7.50" OD) | Grooved |
| 1-1/2 | QF40XASA7G |
| ASA 4 (9.00" OD) | Flat |
| 1-1/2 | QF40XASA9 |
| ASA 4 (9.00" OD) | Grooved |
| 1-1/2 | QF40XASA9G |
| ASA 6 (11.00" OD) | Grooved |
| 2 | QF50XASA11G |
| ASA 1.5 (5.00" OD) | Flat |
| 2 | QF50XASA5 |
| ASA 1.5 (5.00" OD) | Grooved |
| 2 | QF50XASA5G |
| ASA 2 (6.00" OD) | Flat |
| 2 | QF50XASA6 |
| ASA 2 (6.00" OD) | Grooved |
| 2 | QF50XASA6G |
| ASA 3 (7.50" OD) | Flat |
| 2 | QF50XASA7 |
| ASA 3 (7.50" OD) | Grooved |
| 2 | QF50XASA7G |
| ASA 4 (9.00" OD) | Flat |
| 2 | QF50XASA9 |
| ASA 4 (9.00" OD) | Grooved |
| 2 | QF50XASA9G |
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