Introduction
Rotatable Blank (Blind) 316LN Stainless Steel ConFlat® (CF) flanges are designed to seal unused ports in ultra-high vacuum (UHV) systems while offering enhanced corrosion resistance and mechanical stability. Compared with standard 304L variants, 316LN stainless steel provides superior resistance to aggressive environments and improved strength at elevated temperatures, making it a preferred choice for demanding scientific and industrial vacuum applications.
Detailed Description
Our Rotatable Blank (Blind) 316LN SS Standard CF UHV Flanges are precision-machined from low-carbon, nitrogen-enhanced 316LN stainless steel. The addition of nitrogen improves mechanical strength and creep resistance without compromising corrosion performance, while the low carbon content minimizes carbide precipitation and outgassing—both critical for UHV systems.
The rotatable design allows the bolt hole ring to rotate independently from the knife-edge sealing surface. This feature simplifies alignment during installation, especially in confined spaces or when mating with fixed-position components. The knife edges are accurately machined to conform to CF standards, ensuring consistent plastic deformation of oxygen-free copper gaskets and reliable metal-to-metal sealing performance down to 10⁻¹⁰ mbar when properly assembled.
These blind flanges are suitable for repeated bake-out cycles and long-term operation in UHV environments. A full range of standard CF sizes is available, with customization options including special thicknesses, surface finishes, cleaning levels, and marking requirements.
Applications
Rotatable Blank 316LN CF flanges are widely used in:
Ultra-high vacuum (UHV) and high-vacuum systems
Semiconductor manufacturing and process equipment
Particle accelerators, beamlines, and synchrotron facilities
Thin-film deposition systems (PVD, CVD, sputtering)
Scientific research laboratories and analytical instruments
They are particularly suitable for environments requiring higher corrosion resistance or improved mechanical strength.
Technical Parameters
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Material | 316LN Stainless Steel | Enhanced corrosion resistance and strength |
| Flange Standard | ConFlat® (CF) | Ensures UHV compatibility |
| Size Range | DN16CF – DN250CF (custom available) | Covers common UHV port sizes |
| Design | Rotatable Blind (Blank) | Simplifies bolt alignment |
| Seal Type | Knife-edge with copper gasket | Provides reliable UHV metal seal |
| Bake-out Capability | Suitable for UHV bake-out | Maintains integrity at elevated temperatures |
Comparison with Related Materials
| Material | Key Advantage | Typical Application |
|---|---|---|
| 316LN SS Rotatable Blind CF | Superior corrosion resistance, higher strength | Harsh or demanding UHV environments |
| 304L SS Rotatable Blind CF | Cost-effective, widely used | General UHV systems |
| Nickel Alloy Blind CF | Extreme temperature resistance | Specialized high-temperature vacuum systems |
FAQ
| Question | Answer |
|---|---|
| Why choose 316LN over 304L? | 316LN offers better corrosion resistance and higher mechanical strength, especially at elevated temperatures. |
| Is it compatible with standard CF copper gaskets? | Yes, it is designed for standard oxygen-free copper CF gaskets. |
| Can it handle UHV bake-out cycles? | Yes, 316LN SS is well suited for repeated UHV bake-outs. |
| Are custom configurations available? | Yes, size, thickness, surface finish, and cleaning level can be customized. |
Packaging
Our Rotatable Blank (Blind) 316LN SS CF Flanges are carefully tagged and labeled for efficient identification and quality control. Each flange is securely packaged to prevent mechanical damage or surface contamination during storage and transportation.
Conclusion
Rotatable Blank (Blind) 316LN SS Standard ConFlat® (CF) UHV Flanges provide a robust and reliable solution for sealing unused ports in advanced vacuum systems. With enhanced material properties, precise machining, and a user-friendly rotatable design, they are well suited for high-performance UHV applications.
For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.
Ordering Table
| Flange Size/OD | Type | Flange Material | Part Number |
| DN16CF (1.33" OD) | Rotatable | 316LN SS | F0133N000RLN |
| DN35CF-DN40CF (2.75" OD) | Rotatable | 316LN SS | F0275N000RLN |
| DN63CF (4.50" OD) | Rotatable | 316LN SS | F0450N000RLN |
| DN75CF (4.63" OD) | Rotatable | 316LN SS | F0462N000RLN |
| DN100CF (6.00" OD) | Rotatable | 316LN SS | F0600N000RLN |
| DN160CF (8.00" OD) | Rotatable | 316LN SS | F0800N000RLN |
| DN200CF (10.00" OD) | Rotatable | 316LN SS | F1000N000RLN |
| DN250CF (12.00" OD) | Rotatable | 316LN SS | F1200N000RLN |
| DN275CF (13.25" OD) | Rotatable | 316LN SS | F1325N000RLN |
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