Introduction
CF Flanged Stainless Steel Fluorocarbon Bonnet Bellows Sealed Gate Valves (Manual) are precision-engineered components designed for ultra-high vacuum (UHV) and high vacuum (HV) systems. These valves provide reliable isolation and flow control while maintaining exceptional leak tightness and cleanliness. Their bellows-sealed structure and fluorocarbon bonnet design make them particularly suitable for demanding vacuum environments where contamination control and durability are critical.
Detailed Description
These gate valves are constructed from high-grade stainless steel (typically 304L or 316L), ensuring excellent corrosion resistance, low outgassing, and compatibility with UHV environments. The CF (ConFlat) flanged interface utilizes metal-to-metal sealing with copper gaskets, enabling leak rates as low as 10⁻¹⁰ mbar·L/s, which is essential for ultra-high vacuum applications.
The bellows-sealed mechanism isolates the valve stem from the vacuum environment, eliminating dynamic sealing surfaces that could introduce leaks or contamination. This design significantly enhances long-term reliability and reduces maintenance requirements. The inclusion of a fluorocarbon (e.g., Viton®) bonnet provides additional sealing protection on the atmospheric side, improving durability and resistance to environmental exposure.
Manual operation allows for precise control of valve opening and closing, making these valves suitable for systems where automated actuation is not required. The gate valve design ensures minimal conductance restriction when fully open, allowing efficient vacuum pumping and system operation.
Applications
CF Flanged SS Fluorocarbon Bonnet Bellows Sealed Gate Valves (Manual) are widely used in:
- Ultra-High Vacuum (UHV) Systems: Semiconductor fabrication and research equipment
- Thin Film Deposition Systems: PVD, CVD, and evaporation systems
- Vacuum Furnaces: High-temperature vacuum processing
- Analytical Instruments: Mass spectrometry, surface analysis, and synchrotron systems
- Research Laboratories: Clean vacuum environments requiring precise isolation
Technical Parameters
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Material | 304L / 316L Stainless Steel | Low outgassing & corrosion resistance |
| Flange Type | CF (ConFlat) | UHV-compatible metal sealing |
| Valve Type | Gate Valve (Manual) | Full-bore flow with minimal restriction |
| Sealing Mechanism | Bellows + Fluorocarbon Bonnet | Leak-tight and contamination-free operation |
| Leak Rate | ≤ 1 × 10⁻¹⁰ mbar·L/s | Ensures UHV integrity |
| Operating Pressure | UHV to atmospheric | Wide pressure range |
| Temperature Range | Up to ~200°C (depending on materials) | Suitable for vacuum processes |
| Nominal Size | DN16 – DN200 (custom available) | System compatibility |
Comparison with Related Valves
| Valve Type | Key Advantage | Typical Application |
|---|---|---|
| CF Bellows Sealed Gate Valve | Ultra-low leak rate, clean operation | UHV systems |
| KF Manual Valve | Quick connection, easy maintenance | Laboratory HV systems |
| ISO Gate Valve | Large diameter capability | Industrial vacuum lines |
| Pneumatic Gate Valve | Automated control | Process automation systems |
FAQ
| Question | Answer |
|---|---|
| What is the advantage of a bellows seal? | It eliminates dynamic seals, reducing leak risk and contamination in vacuum systems. |
| Why use CF flanges? | CF flanges provide reliable metal-to-metal sealing suitable for ultra-high vacuum environments. |
| Is manual operation sufficient for most systems? | Yes, for many research and industrial setups where automation is not required. |
| Can sizes be customized? | Yes, a wide range of sizes and configurations are available. |
| What maintenance is required? | Minimal maintenance is needed due to the robust bellows-sealed design. |
Packaging
Our CF Flanged SS Fluorocarbon Bonnet Bellows Sealed Gate Valves (Manual) are meticulously tagged and labeled externally to ensure efficient identification and maintain high standards of quality control. We take great care to prevent any potential damage during storage and transportation, ensuring the valves arrive in perfect condition.
Conclusion
CF Flanged SS Fluorocarbon Bonnet Bellows Sealed Gate Valves (Manual) offer a dependable solution for vacuum system isolation and control. With ultra-low leak rates, robust construction, and clean operation, they are ideal for UHV and HV applications across research and industry.
For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.
Ordering Table
| Drawing | Flange Size | Bonnet Seal Type | Thread | Part Number |
| DN63CF (4.50" OD) | Fluorocarbon (FKM) | 5/16-24 | GV0250MVCF |
| DN63CF (4.50" OD) | Fluorocarbon (FKM) | M8 | GV0250MVCFM |
| DN100CF (6.00" OD) | Fluorocarbon (FKM) | 5/16-24 | GV0400MVCF |
| DN100CF (6.00" OD) | Fluorocarbon (FKM) | M8 | GV0400MVCFM |
| DN160CF (8.00" OD) | Fluorocarbon (FKM) | 5/16-24 | GV0600MVCF |
| DN160CF (8.00" OD) | Fluorocarbon (FKM) | M8 | GV0600MVCFM |
Reviews
There are no reviews yet.