CF Flanges
- UHV Sealing Performance: Knife-edge + metal gasket design for ultra-low leak rates.
- High Temperature Capability: Suitable for high-temperature bake-out in vacuum systems.
- Precision Machined Surfaces: Smooth sealing faces and tight dimensional control.
- Multiple Styles Available: Blank, bored, rotatable, non-rotatable, tapped and through-hole designs.
- Standard & Custom Sizes: From small instrumentation ports to large chamber flanges.
Technical Specifications
| Item | Specification |
| Product Name | CF Flanges (ConFlat Ultra-High Vacuum Flanges) |
| Size Range | Standard CF sizes or according to customer drawing |
| Flange Types | Blank, bored, rotatable, non-rotatable, tapped, through-hole |
| Sealing Type | Knife-edge metal gasket (typically oxygen-free copper) |
| Typical Materials | SS304 / 304L / 316L; other stainless or special alloys on request |
| Pressure / Vacuum Range | High vacuum to ultra-high vacuum (system-dependent) |
| Temperature Capability | Suitable for high-temperature bake-out (limited by material and gasket) |
| Surface Finish | Precision-machined sealing faces for reliable gasket compression |
| Standards / Interfaces | Compatible with common CF/UHV industry dimensions |
| Production Basis | Manufactured according to customer drawings or specified CF standards |
Customization Options
- Size and Bore: Any standard CF size or fully custom diameter and bore per drawing.
- Flange Style: Choice of blank, bored, rotatable, non-rotatable, tapped, or special flange designs.
- Material Selection: 304 / 304L / 316L stainless steel or other alloys for special environments.
- Surface Finish: Custom sealing-face finish and polishing level on request.
- Hole Pattern & Threading: Custom bolt-hole count, pattern, and tapped/through-hole options.
- Weld Preparation: Tailored weld neck lengths, bevels and tube transitions.
Applications
- Ultra-high vacuum (UHV) chambers and components
- Particle accelerators and beamlines
- Synchrotron and neutron research facilities
- Semiconductor processing equipment
- Surface science and analytical instruments (XPS, AES, STM, etc.)
- Thin-film deposition and sputtering systems
- Cryogenic and space-simulation vacuum systems
Raw Materials
We produce and purchase raw materials strictly according to customer requirements, ensuring full compliance with project specifications, mechanical properties, and international standards.
Main steel grades we produce:
Steel Grade | Standards | Classification | Products |
1.4301, 1.4307, 1.4401, 1.4404, 1.4541, 1.4871 | EN 10222-5 | L | Forged flanges and Forged parts |
F304, F304L, F316, F316L, F321, F316T, F310, F904L | ASTM A182 | L | Forged flanges and Forged parts |
F51, F53, F55, F60 | ASTM A182 | L | Forged flanges and Forged parts |
LF2 | ASTM A350 | V | Forged flanges and Forged parts |
F11, F22 | ASTM A182 | V | Forged flanges and Forged parts |
A105 | ASTM A105 | N | Forged flanges and Forged parts |
CNC Machining Capabilities
We operate multiple machining lines and CNC centers engineered to deliver tight tolerances, superior surface finishes, and consistent quality for complex forged components.
Equipments and Quantities | ||
Item No. | Equipments | Quantities |
1 | Ramp CNC lathe | 6 |
2 | Normal lathe | 8 |
3 | Machining center | 4 |
4 | CNC lathe | 10 |
Inspection & Quality Control
To ensure the high quality of non-standard flanges, we are equipped with professional testing and inspection systems:
- 3D Measurement Equipment
- Ultrasonic Cleaning Machine
- Physical & Chemical Testing
- Dimensional Inspection
Packaging for Non-Standard Flanges
We provide protective packaging options according to customer needs:
- Anti-rust treatment
- Plastic film wrapping
- Wooden cases
- Wooden pallets
- Custom packaging available
Why Choose Boberry
Complete In-House Manufacturing
Integrated forging, heat treatment, machining, and inspection ensure stable quality, faster lead times, and full control over every production stage.
European-Market Proven Quality
Long-term supply to Germany, Austria, Switzerland, and Nordic countries demonstrates our ability to meet strict technical standards and customer expectations.
Custom Engineering Support
Tailor-made stainless-steel parts based on your drawings, with trial samples available to validate design, performance, and fit before full-scale production.