KF Vacuum Clamp Flange Centering Ring with NBR/FKM O-Ring Seal

Achieve airtight, leak-free connections in your vacuum system with this KF Vacuum Flange Centering Ring and O-Ring Seal Set. Available in KF10, KF16, KF25, KF40, and KF50 sizing, these fittings are engineered for precision and durability — whether you're outfitting a homebrew lab, a semiconductor fabrication setup, or an industrial vacuum processing line.

Made in Mainland China.

Key Features

• Multiple Size Options: Fits KF10, KF16, KF25, KF40, and KF50 flanges — versatile for a wide range of vacuum pipeline configurations.
• Premium Materials: Aluminum alloy and 304 stainless steel bracket combined with your choice of NBR or FKM (Fluororubber) O-ring for superior chemical compatibility and long-term durability.
• High Sealing Performance: Precision-engineered to create a reliable airtight seal that prevents gas or liquid leakage, maintaining the stability of your vacuum environment.
• Wear & Corrosion Resistant: Built to withstand demanding industrial and laboratory conditions, reducing maintenance frequency and replacement costs over time.
• Easy Installation: Moderate size and weight make these fittings straightforward to handle and install — no special tools required for most setups.
• Professionally Tested: Each component undergoes quality assurance testing to ensure consistent, dependable performance up to <850 kPa pressure ratings.

Specifications

• Category: Vacuum System Sealing Component
• Materials: Aluminum Alloy / 304 Stainless Steel Bracket + NBR or FKM O-Ring
• Available Sizes: KF10, KF16, KF25, KF40, KF50
• Max Pressure: <850 kPa
• Connection Type: Male / Plug
• Quantity: 1 piece per order
• Country of Origin: Made in Mainland China

Applications

• Vacuum pipelines and chambers
• Semiconductor manufacturing equipment
• Vacuum coating machines
• Industrial vacuum processing systems
• Laboratory and research vacuum equipment
• Homebrewing and fermentation setups

Note: Due to manual measurement, minor dimensional tolerances may exist. Slight color variation may occur due to lighting and display differences.

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Helpful Resource

For safety guidelines on handling industrial fittings and vacuum equipment in the workplace, visit the OSHA Compressed Gas and Equipment Safety page.

Learn more: Piping and plumbing fitting

Frequently Asked Questions

Q: What sizes does this KF vacuum flange centering ring come in?

A: This vacuum clamp fitting set is available in five standard KF sizes: KF10, KF16, KF25, KF40, and KF50. Be sure to select the size that matches your existing vacuum pipeline or flange connection for a proper airtight seal.

Q: What is the difference between the NBR and FKM O-ring options?

A: NBR (Nitrile Butadiene Rubber) O-rings offer excellent resistance to oils and general-purpose gases, making them ideal for standard vacuum and homebrewing applications. FKM (Fluororubber/Viton) O-rings provide superior chemical and high-temperature resistance, making them better suited for more demanding laboratory or industrial environments involving aggressive chemicals or elevated temperatures.

Q: What is the maximum pressure rating for this vacuum clamp fitting?

A: This fitting is rated for pressures up to <850 kPa, making it suitable for a broad range of vacuum pipeline, laboratory, and industrial processing applications.

Q: Is this fitting suitable for homebrewing and fermentation systems?

A: Yes! The KF vacuum flange clamp fitting is widely used in homebrew and fermentation setups thanks to its reliable airtight seal, durable stainless steel and aluminum alloy construction, and easy installation — all ideal for maintaining a controlled brewing environment.