Introduction
KF (QF) HV Centering Rings with Screen are specialized vacuum components designed to ensure proper alignment of KF flanges while incorporating a protective mesh to prevent particle migration within vacuum systems. Manufactured from stainless steel, these components are widely used in high vacuum (HV) applications where system cleanliness, protection of sensitive equipment, and reliable sealing are critical.
Detailed Description
KF centering rings with screen combine three essential elements: a precision-machined stainless steel centering ring, an elastomer O-ring seal, and an integrated stainless steel mesh screen. The centering ring ensures accurate alignment between mating KF flanges, while the O-ring (commonly Viton) provides a leak-tight vacuum seal.
The addition of a fine stainless steel screen serves as a physical barrier to trap particles, debris, or contaminants that could otherwise travel through the vacuum line. This is particularly important in systems involving pumps, deposition chambers, or sensitive analytical instruments where particulate contamination can affect performance or damage components.
Constructed from corrosion-resistant stainless steel (typically SS304 or SS316), these centering rings offer excellent durability and compatibility with a wide range of vacuum environments. The mesh screen is securely fixed within the ring, ensuring stability during operation without affecting gas flow significantly.
These components are fully compatible with ISO-KF standards and can be easily installed using KF clamps, making them ideal for modular vacuum system configurations that require frequent assembly and disassembly.
Key features include:
Integrated stainless steel mesh screen for particle filtration
Precision centering ring for accurate flange alignment
High-quality elastomer O-ring for reliable sealing
Corrosion-resistant stainless steel construction
Compatible with standard ISO-KF (QF) vacuum systems
Easy installation with KF clamp kits
Applications
KF centering rings with screen are widely used in:
Vacuum pumping systems (protecting pumps from debris)
Thin film deposition systems (PVD, CVD)
Semiconductor processing equipment
Analytical instruments and vacuum lines
Research laboratories and clean vacuum environments
Particle-sensitive vacuum processes
Technical Parameters
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Material | SS304 / SS316 (ring & screen) | Corrosion resistance & durability |
| Seal Material | Viton / NBR / EPDM | Ensures vacuum sealing |
| Standard | ISO-KF (QF) | System compatibility |
| Size Range | KF10 – KF50 (custom available) | Matches flange sizes |
| Screen Type | Stainless steel mesh | Particle filtration |
| Operating Pressure | Up to ~10⁻⁸ mbar | Suitable for HV systems |
Comparison with Related Materials
| Material/System | Key Advantage | Typical Application |
|---|---|---|
| KF Centering Ring (with screen) | Particle filtration + sealing | Vacuum protection |
| Standard KF Centering Ring | Basic alignment and sealing | General HV systems |
| CF Flange with filter | UHV compatibility | Ultra-clean systems |
| Inline vacuum filters | Higher filtration efficiency | Specialized systems |
FAQ
| Question | Answer |
|---|---|
| What is the purpose of the screen? | It prevents particles or debris from entering sensitive parts of the vacuum system. |
| Does the screen affect vacuum performance? | It has minimal impact on flow while providing effective particle protection. |
| What sizes are available? | Standard sizes range from KF10 to KF50, with customization available. |
| Can different O-ring materials be selected? | Yes, Viton, NBR, and EPDM options are available depending on application conditions. |
| Are these reusable? | Yes, they are designed for repeated use in modular vacuum systems. |
Packaging
Our KF (QF) HV Centering Rings with Screen (SS) 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 components arrive in perfect condition.
Conclusion
KF (QF) HV Centering Rings with Screen provide an efficient solution for combining reliable vacuum sealing with particle protection. Their robust stainless steel construction, ease of use, and compatibility with standard KF systems make them indispensable components in maintaining clean and stable vacuum environments.
For detailed specifications and a quotation, please contact us at sales@thinfilmmaterials.com.
Ordering Table
| Drawing | Flange OD | Dim A | Dim B | Part Number |
| KF16 | 0.5 | 0.67 | QF16-SRV-SM |
| KF25 | 0.86 | 1.03 | QF25-SRV-SM |
|
| KF40 | 1.45 | 1.61 | QF40-SRV-SM |
|
| KF50 | 1.88 | 2.05 | QF50-SRV-SM |
Accessories Table
| Description | Part Number |
| Vacuum and Lubricating Grease | APMB |
| Replacement o-ring | O-V314 |
| Replacement o-ring | O-V320 |
| Replacement o-ring | O-V326 |
| Replacement o-ring | O-V330 |
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