KF Bored Weld Flanges High-Quality Vacuum Flange Solutions

Premium KF bored weld flanges for vacuum systems, available in KT10, KT16, KT25, KT40, and KF50 sizes. Precision-engineered with exact dimensions for leak-proof performance in semiconductor, aerospace, and research applications.

Working Principle

KF bored weld flanges create hermetic seals in vacuum systems through precision-machined surfaces that mate with compatible fittings. The bored center allows smooth gas flow while the welded construction ensures ultra-high vacuum integrity (10⁻⁹ mbar range).

3. Product Features

✅ Precision boring: Laser-measured bore diameters within ±0.01mm tolerance
✅ Material options: 304/316 stainless steel or aluminum variants
✅ Vacuum-rated: Certified for 10⁻⁹ mbar applications
✅ Multi-size compatibility: Interchangeable with ISO-KF/KT standards
✅ Pre-installed centering rings: For perfect alignment during welding

4. Application Areas

Semiconductor: CVD/PVD equipment vacuum chambers

Pharmaceutical: Freeze dryer installations

Research: Particle accelerator vacuum systems

Aerospace: Space simulation chambers

Energy: Fusion reactor peripheral systems

 Technical Specifications

5. Industry Case Study

Installed 280+ KT25 flanges in a quantum computing research facility, achieving <5×10⁻¹⁰ mbar base pressure with zero flange-related leaks over 3 years of operation.

6. Frequently Asked Questions (FAQ)

1. What's the maximum pressure rating?

All flanges rated for full vacuum (10⁻⁹ mbar) to 10 bar positive pressure.

2. Are gaskets included?

Sold separately - recommend Viton® or Fluoropolymer gaskets for UHV applications.

3. How to verify flange orientation?

Laser-etched alignment marks on flange periphery ensure correct positioning.

4. Acceptable welding methods?

TIG welding recommended (max 150A current for stainless steel versions).

5. Surface finish specifications?

Ra ≤ 0.8μm on sealing surfaces, electropolishing available.

6. Lead time for custom sizes?

14 working days for non-standard bore dimensions.

7. Temperature operating range?

-270°C to +450°C (standard), special alloys available for extreme temperatures.

8. Certification documentation?

Supplied with material certs (3.1), vacuum test reports, and ISO 9001 compliance.

9. How to prevent weld distortion?

Precision jigs available for purchase to maintain dimensional stability.

10. Industry standards compliance?

Meets ISO 2861, DIN 28404, and SEMI F72 specifications.

Conclusion

Our KF bored weld flanges are the preferred choice for 80+ Fortune 500 technology companies. Request free samples or download our vacuum flange engineering whitepaper to optimize your system design.

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