Introduction
KF (QF) HV Blank Flanges (Aluminum 6061-T6) are lightweight, high-precision vacuum components designed to temporarily or permanently seal unused ports in high-vacuum (HV) systems. Thanks to their standardized geometry and excellent material properties, these aluminum blank flanges are widely used in laboratory setups, semiconductor tools, and industrial vacuum piping where ease of handling and clean sealing are required.
Detailed Description
Manufactured in accordance with KF/QF (also known as NW) vacuum standards, these blank flanges provide a simple and reliable way to close off KF ports without modifying the system layout. When used with a standard centering ring, O-ring, and clamp, they form a secure, leak-tight seal suitable for high-vacuum operation.
The use of Aluminum 6061-T6 offers a balanced combination of strength, low weight, and corrosion resistance. Compared with stainless steel blanks, aluminum versions are easier to handle during installation and reduce overall system mass—an advantage for mobile equipment, compact frames, or frequently reconfigured vacuum lines.
Key features include:
Precision-machined sealing face for uniform O-ring compression
Smooth surface finish to minimize particle generation
Lightweight construction for easy installation and removal
Excellent compatibility with standard KF clamps and centering rings
Applications
Sealing unused KF/QF ports in HV vacuum systems
Semiconductor process tools and R&D chambers
Thin film deposition equipment (PVD, sputtering, evaporation)
Analytical instruments and vacuum test setups
Temporary system isolation during maintenance or modification
Technical Parameters
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Material | Aluminum 6061-T6 | Lightweight, corrosion-resistant |
| Standard Sizes | KF10, KF16, KF25, KF40, KF50 | Matches common KF vacuum ports |
| Connection Type | KF (QF / NW) | Ensures standard compatibility |
| Sealing Method | O-ring with centering ring & clamp | Reliable HV sealing |
| Surface Finish | Machined (optional anodizing) | Affects cleanliness and durability |
| Vacuum Range | Up to ~10⁻⁷ mbar (typical) | Suitable for HV systems |
Comparison with Related Blank Flanges
| Material | Key Advantage | Typical Application |
|---|---|---|
| Aluminum 6061-T6 KF Blank | Lightweight, easy handling | Labs & modular HV systems |
| Stainless Steel KF Blank | Higher strength, bakeout capability | Demanding HV/UHV environments |
| Plastic KF Blank | Low cost, electrical isolation | Temporary or low-duty use |
FAQ
| Question | Answer |
|---|---|
| Are KF, QF, and NW the same standard? | Yes, they refer to the same standardized vacuum flange system. |
| Is this suitable for UHV systems? | Mainly for HV; CF blanks are preferred for true UHV. |
| Does it include O-ring and clamp? | Typically supplied separately unless requested as a set. |
| Can it be anodized? | Yes, anodized finishes are available on request. |
| Can custom sizes be made? | Standard sizes are stocked; custom designs are possible. |
Packaging
Our KF (QF) HV Blank Flanges (Aluminum 6061-T6) are carefully cleaned and individually packed to protect the sealing surface. Each flange is clearly labeled and shipped with protective foam and export-grade cartons to ensure safe delivery.
Conclusion
KF (QF) HV Blank Flanges (Aluminum 6061-T6) provide a lightweight, practical, and cost-effective solution for sealing KF vacuum ports in high-vacuum systems. Their standardized design, clean machining, and ease of use make them an ideal choice for both permanent installations and temporary system configurations.
For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.
Ordering Table
| Flange Size/OD | Type | Flange Material | Drawing | Part Number |
| KF10 (1.18" OD) | Blank, Flange | 6061-T6 Aluminum |
| QF10-050-AB |
| KF16 (1.18" OD) | Blank, Flange | 6061-T6 Aluminum |
| QF16-075-AB |
| KF25 (1.57" OD) | Blank, Flange | 6061-T6 Aluminum |
| QF25-100-AB |
| KF40 (2.16" OD) | Blank, Flange | 6061-T6 Aluminum |
| QF40-150-AB |
| KF50 (2.95" OD) | Blank, Flange | 6061-T6 Aluminum |
| QF50-200-AB |
Accessories Table
| Description | For | Per Package | Part Number |
| Cast Clamps (Aluminum) | KF10, KF16 Flanges | 1 | QF16-075-C |
| Cast Clamps (Aluminum) | KF25 Flanges | 1 | QF25-100-C |
| Cast Clamps (Aluminum) | KF40 Flanges | 1 | QF40-150-C |
| Cast Clamps (Aluminum) | KF50 Flanges | 1 | QF50-200-C |
| Lever Clamps (Aluminum) | KF10, KF16 Flanges | 1 | QF16-075-CHA |
| Lever Clamps (Aluminum) | KF25 Flanges | 1 | QF25-100-CHA |
| Lever Clamps (Aluminum) | KF40 Flanges | 1 | QF40-150-CHA |
| Centering Ring (Aluminum with Fluorocarbon O-Ring) | KF10 Flanges | 1 | QF10-050-ARV |
| Centering Ring (Aluminum with Fluorocarbon O-Ring) | KF16 Flanges | 1 | QF16-075-ARV |
| Centering Ring (Aluminum with Fluorocarbon O-Ring) | KF25 Flanges | 1 | QF25-100-ARV |
| Centering Ring (Aluminum with Fluorocarbon O-Ring) | KF40 Flanges | 1 | QF40-150-ARV |
| Centering Ring (Aluminum with Fluorocarbon O-Ring) | KF50 Flanges | 1 | QF50-200-ARV |
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