Thin Film Materials Logo
Generic selectors
Exact matches only
Search in title
Search in content
Post Type Selectors
🔍
KF (QF) HV Blank Flanges (Brass)

KF (QF) HV Blank Flanges (Aluminum 6061-T6)

KF (QF) HV Blank Flanges (Aluminum 6061-T6): Lightweight and Effective Sealing for High-Vacuum Infrastructure

KF (QF) HV Blank Flanges (Aluminum 6061-T6) are lightweight, high-precision components used to cap unused ports in high-vacuum (HV) systems. Designed in accordance with ISO standards for Klein Flansche (KF) fittings, these blank flanges are compatible with all standard KF hardware and provide a reliable vacuum seal for foreline or through-line plumbing, as well as for simple HV chamber terminations.

Manufactured from Aluminum 6061-T6, these KF (QF) HV blank flanges offer a highly practical solution where low mass, corrosion resistance, and ease of handling are essential. Compared to stainless steel, aluminum is significantly lighter, making it especially suitable for mobile, space-sensitive, or modular vacuum systems used in research labs, vacuum packaging setups, analytical instrumentation, and prototype environments.

Each KF (QF) HV Blank Flange (Aluminum 6061-T6) features a flat, solid sealing face and a chamfered back surface that aligns perfectly with the o-ring assembly. When used with a KF centering ring and elastomeric o-ring, and secured via a circumferential clamp (e.g., wing-nut, thumbscrew, or over-center lever), the flange delivers a leak-tight connection that can maintain vacuum levels down to 10⁻⁸ Torr.

The aluminum construction not only reduces component weight but also offers good thermal conductivity and resistance to oxidation in dry vacuum environments. While not recommended for corrosive or chemically aggressive applications, Aluminum 6061-T6 performs reliably in most general-purpose vacuum systems and is easy to machine, handle, and assemble.

Just like all KF-based components, the sealing efficiency of KF (QF) HV Blank Flanges (Aluminum 6061-T6) is determined by the properties of the o-ring used. Most systems will operate within a thermal range of 0 °C to 120–180 °C, depending on the o-ring compound, such as Viton, Buna-N, or silicone.

TFM supplies these blank flanges in all standard sizes including KF16, KF25, KF40, and KF50, ensuring seamless integration into existing KF plumbing. These blanks are particularly useful in flexible vacuum setups where ports may need to be capped temporarily or reconfigured frequently. They also support system isolation during maintenance or staged installation.

In summary, KF (QF) HV Blank Flanges (Aluminum 6061-T6) are the go-to choice for vacuum users seeking a lightweight, corrosion-resistant, and cost-effective method to cap unused KF ports in general HV applications. Their simple design, full KF compatibility, and ease of use make them indispensable across a wide range of vacuum environments.

Ordering Table

Flange Size/OD Type Flange Material Drawing Part Number
KF10 (1.18" OD) Blank, Flange 6061-T6 Aluminum Tooltip QF10-050-AB
KF16 (1.18" OD) Blank, Flange 6061-T6 Aluminum Tooltip QF16-075-AB
KF25 (1.57" OD) Blank, Flange 6061-T6 Aluminum Tooltip QF25-100-AB
KF40 (2.16" OD) Blank, Flange 6061-T6 Aluminum Tooltip QF40-150-AB
KF50 (2.95" OD) Blank, Flange 6061-T6 Aluminum Tooltip QF50-200-AB

Accessories Table

Description For Per Package Part Number
Cast Clamps (Aluminum) KF10, KF16 Flanges 1 QF16-075-C
Cast Clamps (Aluminum) KF25 Flanges 1 QF25-100-C
Cast Clamps (Aluminum) KF40 Flanges 1 QF40-150-C
Cast Clamps (Aluminum) KF50 Flanges 1 QF50-200-C
Lever Clamps (Aluminum) KF10, KF16 Flanges 1 QF16-075-CHA
Lever Clamps (Aluminum) KF25 Flanges 1 QF25-100-CHA
Lever Clamps (Aluminum) KF40 Flanges 1 QF40-150-CHA
Centering Ring (Aluminum with Fluorocarbon O-Ring) KF10 Flanges 1 QF10-050-ARV
Centering Ring (Aluminum with Fluorocarbon O-Ring) KF16 Flanges 1 QF16-075-ARV
Centering Ring (Aluminum with Fluorocarbon O-Ring) KF25 Flanges 1 QF25-100-ARV
Centering Ring (Aluminum with Fluorocarbon O-Ring) KF40 Flanges 1 QF40-150-ARV
Centering Ring (Aluminum with Fluorocarbon O-Ring) KF50 Flanges 1 QF50-200-ARV

Related Products

Related products

FAQ

Tube fittings are designed for tubes (measured by outside diameter and wall thickness) used in high-pressure and instrumentation applications, whereas pipe fittings are for pipes (identified by nominal pipe size) primarily used in fluid transport.

 

Common valve types include ball valves, gate valves, check valves, butterfly valves, and globe valves. Each serves a specific function—from quick shutoff (ball/gate valves) to flow regulation (globe valves).

 

  • For tubing, measure the outside diameter; for pipes, refer to the nominal pipe size (using conversion charts if needed). Always match the valve or fitting size to your pipe’s dimensions and flow requirements.

  • Frequently used thread types include NPT (National Pipe Tapered), BSP (British Standard Pipe), and UNC, along with slip-fit options that rely on compression or fusion rather than threads.

Interchangeability depends on manufacturer specifications and certification. Always verify compatibility via manufacturer guides or certified interchangeability charts.

 

  • A coupling is a short, straight fitting used to join two pipes or tubes. It provides a secure, leak-tight connection and can sometimes serve to extend or repair piping runs.

Consider valve type, pressure and temperature ratings, material compatibility with your fluid, actuation method (manual or automatic), and maintenance requirements.

 

  • Valves regulate flow by opening, closing, or partially obstructing the pathway. Their mechanisms (such as the rotation of a ball or the linear movement of a gate) determine the speed and precision of flow control.

  • A flange is a flat, circular component used to connect pipes, valves, or other equipment. Bolted together with gaskets, flanges provide a secure, leak-proof joint that facilitates both assembly and maintenance.

  • Manual valves require physical operation via handles or levers, whereas actuated valves use mechanisms—pneumatic, electric, or hydraulic—to open and close automatically or remotely.

  • Issues include leaks caused by improper installation, over-tightening, degraded seals, material incompatibility, and fatigue from repeated cycling. Regular inspection and proper installation practices help mitigate these problems.

Regular maintenance involves periodic inspections, cleaning or replacing worn seals, ensuring proper torque during installation, and adhering to manufacturer guidelines and local plumbing codes to preserve system integrity.

 

Shopping Cart
en en