1. Configuration Options
- Custom Fabrication: Supply your technical drawings – we’ll manufacture bellows with precisely matched flanges/tube ends.
- Standard Flange Selection: Choose from industry-standard UHV flanges (listed below).
- Tube-End Configuration: Direct tube welding ends for piping integration.
- Material Flexibility: 316L SS, Inconel®, Hastelloy®, Titanium, Monel®.
2. Ultra-High Vacuum Flange Standards
| Flange Type | Standard Name | Pressure Rating | Common Applications |
|---|---|---|---|
| CF (ConFlat) | Varian/Agilent Standard | 10−12 mbar range | Semiconductor, particle physics |
| ISO-KF | ISO 2861 (Quick Flange) | 10−9 mbar range | Laboratory vacuum systems |
| ISO-F | ISO 1609 | 10−10 mbar range | High-vacuum industrial systems |
| NW/KF | DIN 28404 | 10−8 mbar range | European vacuum systems |
| ASA/ANSI | ASME B16.5 | Varies by class | Industrial process systems |
| DIN | DIN 2633–2638 | Up to PN40 | European industrial systems |
3. Key Specifications
- Size Range: OD 10–500 mm | ID 10–500 mm
- Pressure Rating: Up to 1000+ psi (material dependent)
- Temperature Range: Cryogenic to 800°C
- End Reinforcement: Optional thickened end convolutions (2–3 layers)
- Leak Rate: < 1×10−10 std cc/sec He (mass spectrometer tested)
4. Manufacturing Process
- TIG/Laser welding of individual diaphragms
- Precision flange/tube-end welding under argon atmosphere
- Helium leak testing of final assembly
- Surface passivation & cleaning for UHV applications
Ordering Options
| Configuration | Required Specifications | Lead Time |
|---|---|---|
| Standard Flange | Flange type, OD/ID, lengths, material | 2–3 weeks |
| Custom Flange | Technical drawings, material spec | 4–6 weeks |
| Tube-End | Tube dimensions, OD/ID, lengths, material | 3–4 weeks |
How to Order
- Select configuration:
- Standard flange (specify type)
- Custom flange (provide drawings)
- Tube-end connection
- Specify dimensions:
- Outer Diameter (10–500 mm)
- Inner Diameter (10–500 mm)
- Free/Compressed/Extended Lengths
- Choose material and end reinforcement option
- Provide quantity requirements
We’ll deliver complete CAD models for approval before manufacturing!
Why Choose Our Flanged Bellows?
- Zero rework: Perfect flange-to-bellows alignment
- UHV-certified welding processes
- Single-source responsibility for entire assembly
- Volume discounts for OEM quantities
- Material certifications for traceability