Introduction
ISO-F HV Blank Flanges (Bolted) are high-vacuum (HV) sealing components designed to securely close unused ISO-K/ISO-F ports in vacuum systems. Featuring a bolted flange interface, ISO-F blank flanges provide robust mechanical fixation and reliable sealing performance in applications where structural stability and repeatable installation are essential. They are widely used in research laboratories, thin film deposition systems, semiconductor equipment, and industrial vacuum lines.
Detailed Description
Our ISO-F HV Blank Flanges are precision-machined from high-quality stainless steel, typically 304 or 316L, ensuring excellent corrosion resistance, mechanical strength, and low outgassing characteristics. The bolted flange configuration includes standardized bolt-hole patterns compatible with ISO-F (fixed flange) vacuum standards, allowing secure clamping with appropriate centering rings and elastomer O-rings.
Unlike ISO-K quick-clamp flanges, ISO-F flanges are designed for bolted connections, providing enhanced rigidity and suitability for larger-diameter vacuum lines or applications subject to vibration and mechanical load. The sealing interface is typically used with elastomer O-rings (such as FKM or NBR) and centering rings to achieve reliable high-vacuum sealing.
Each flange is machined to tight tolerances to ensure flatness, proper alignment, and leak-tight performance. Surface finishes are optimized to minimize virtual leaks and support clean vacuum operation.
Applications
ISO-F HV Blank Flanges (Bolted) are commonly used in:
High-vacuum (HV) pumping systems
Thin film deposition equipment (PVD / CVD)
Semiconductor processing tools
Research vacuum chambers and test benches
Particle accelerators and analytical instruments
Industrial vacuum lines and foreline isolation
Technical Parameters
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Flange Type | ISO-F (Bolted) | Fixed, rigid flange connection |
| Material | SS304 / SS316L | Corrosion resistance & strength |
| Nominal Sizes | ISO 63 – ISO 500 | Matches ISO vacuum standards |
| Sealing Method | O-ring + Centering Ring | Reliable HV sealing |
| Surface Finish | Machined & cleaned | Reduces virtual leaks |
| Pressure Range | Atmosphere to 10⁻⁷ mbar (typical HV) | Suitable for high vacuum systems |
Comparison with Related Flange Types
| Flange Type | Key Advantage | Typical Application |
|---|---|---|
| ISO-F (Bolted) | Rigid and stable connection | Larger HV systems |
| ISO-K (Clamp)** | Quick assembly | Medium-sized HV systems |
| CF (ConFlat)** | Metal seal, UHV capable | Ultra-high vacuum |
| KF (NW)** | Compact & quick release | Roughing & foreline |
FAQ
| Question | Answer |
|---|---|
| What is the difference between ISO-F and ISO-K? | ISO-F uses bolted connections for greater rigidity, while ISO-K uses clamp rings for faster assembly. |
| Are O-rings included? | O-rings and centering rings can be supplied upon request. |
| What material is recommended? | 304 or 316L stainless steel is commonly used for HV systems. |
| Can custom sizes be manufactured? | Yes, custom machining and special configurations are available. |
Packaging
Our ISO-F HV Blank Flanges (Bolted) are carefully cleaned, capped, and individually packaged to prevent surface contamination and mechanical damage. Export-grade packaging ensures safe transportation and immediate readiness for installation.
Conclusion
ISO-F HV Blank Flanges (Bolted) provide a secure and reliable solution for sealing high-vacuum system ports. With precision machining, robust bolted design, and compatibility with ISO vacuum standards, they are well suited for demanding research, semiconductor, and industrial vacuum applications.
For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.
Ordering Table
| Flange Size/OD | Type | Flange Material | Nominal Tube OD (in) | Drawing | Thickness (in) | Minimal Number of Clamps | Optimal Number of Clamps | Part Number |
| ISO63-K (3.74") | Blank, Clamp Style | 304L SS | 2-1/2 |
| 0.47 | 3 | 4 | QF63-BK |
| ISO63-K (3.74") | Blank, Clamp Style | 6061-T6 Aluminum | 2-1/2 |
| 0.47 | 3 | 4 | QF63-ABK |
| ISO80-K (4.33") | Blank, Clamp Style | 304L SS | 3 |
| 0.47 | 4 | 8 | QF80-BK |
| ISO80-K (4.33") | Blank, Clamp Style | 6061-T6 Aluminum | 3 |
| 0.47 | 4 | 8 | QF80-ABK |
| ISO100-K (5.12") | Blank, Clamp Style | 304L SS | 4 |
| 0.47 | 4 | 8 | QF100-BK |
| ISO100-K (5.12") | Blank, Clamp Style | 6061-T6 Aluminum | 4 |
| 0.47 | 4 | 8 | QF100-ABK |
| ISO160-K (7.09") | Blank, Clamp Style | 304L SS | 6 |
| 0.47 | 4 | 8 | QF160-BK |
| ISO160-K (7.09") | Blank, Clamp Style | 6061-T6 Aluminum | 6 |
| 0.47 | 4 | 8 | QF160-ABK |
| ISO200-K (9.45") | Blank, Clamp Style | 304L SS | 8 |
| 0.47 | 6 | 12 | QF200-BK |
| ISO200-K (9.45") | Blank, Clamp Style | 6061-T6 Aluminum | 8 |
| 0.47 | 6 | 12 | QF200-ABK |
| ISO250-K (11.42") | Blank, Clamp Style | 304L SS | 10 |
| 0.47 | 6 | 12 | QF250-BK |
| ISO250-K (11.42") | Blank, Clamp Style | 6061-T6 Aluminum | 10 |
| 0.47 | 6 | 12 | QF250-ABK |
| ISO320-K (14.57") | Blank, Clamp Style | 304L SS | 12-3/4 |
| 0.67 | 8 | 12 | QF320-BK |
| ISO320-K (14.57") | Blank, Clamp Style | 6061-T6 Aluminum | 12-3/4 |
| 0.67 | 8 | 12 | QF320-ABK |
| ISO400-K (17.72") | Blank, Clamp Style | 304L SS | 16 |
| 0.67 | 8 | 16 | QF400-BK |
| ISO400-K (17.72") | Blank, Clamp Style | 6061-T6 Aluminum | 16 |
| 0.67 | 8 | 16 | QF400-ABK |
| ISO500-K (21.65") | Blank, Clamp Style | 304L SS | 20 |
| 0.67 | 12 | 16 | QF500-BK |
| ISO500-K (21.65") | Blank, Clamp Style | 6061-T6 Aluminum | 20 |
| 0.67 | 12 | 16 | QF500-ABK |
| ISO630-K (27.17") | Blank, Clamp Style | 304L SS | 24 |
| 0.86 | 14 | 18 | QF630-BK |
| ISO630-K (27.17") | Blank, Clamp Style | 6061-T6 Aluminum | 24 |
| 0.87 | 14 | 18 | QF630-ABK |
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