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KF (QF) HV 5-Way Crosses

KF (QF) HV 5-Way Crosses

KF (QF) HV 5-Way Crosses: A Versatile Solution for High Vacuum Applications

In the world of vacuum technology, adaptability and precision are key to system performance. KF (QF) HV 5-Way Crosses serve as indispensable components for engineers and researchers who need to create complex vacuum setups while maintaining high reliability and leak-tight integrity. These fittings are specifically designed to conform to the ISO-KF standard, commonly used in high and medium vacuum systems.

What Are KF (QF) HV 5-Way Crosses?

A 5-way cross features five ports arranged orthogonally—typically one central inlet/outlet with four ports branching out perpendicularly. This configuration allows users to connect multiple vacuum lines or instruments to a single junction, making the 5-way cross an excellent choice for labs, research facilities, and industrial environments where space and accessibility are at a premium.

Materials and Construction

These vacuum crosses are generally constructed from high-quality stainless steel (such as 304 or 316L) or corrosion-resistant aluminum, depending on the application’s thermal and chemical demands. Stainless steel offers durability, strength, and low outgassing, while aluminum provides a lightweight, cost-effective alternative with good thermal conductivity.

Features and Benefits

  • Multi-Directional Access: Five flanged ports allow for the integration of multiple devices, such as pressure gauges, viewports, feedthroughs, or additional vacuum lines.

  • Standard KF Flanges: Quick and easy connections using clamps and centering rings with O-rings ensure fast assembly and maintenance.

  • Leak-Tight Design: Precision manufacturing ensures vacuum integrity, which is essential in high-vacuum systems.

  • Modularity: Supports reconfiguration of setups without welding or major disassembly.

Typical Applications

  • Research Laboratories: Ideal for experimental setups that require the flexibility to modify vacuum pathways or add new instruments on the fly.

  • Semiconductor Industry: Used in wafer processing systems that demand clean, controlled vacuum environments.

  • Vacuum Coating and Deposition Systems: Helps route gas or plasma sources to various chambers or tools.

  • Analytical Instruments: Supports connections for mass spectrometers, residual gas analyzers, and ion pumps.

Compatibility

KF (QF) HV 5-Way Crosses are compatible with a wide range of vacuum accessories that use the same flange standard. From valves and baffles to bellows and traps, these crosses serve as centralized nodes for system expansion.

Final Thoughts

When building or expanding a high-vacuum system, flexibility and reliability are paramount. KF (QF) HV 5-Way Crosses from trusted manufacturers offer a smart, modular solution that supports dynamic configurations without compromising vacuum performance. Whether you’re operating in a high-precision lab or an industrial setting, integrating a 5-way cross can streamline your setup and future-proof your system against evolving needs.

Ordering Table

Flange Size/OD Type Flange Material Drawing Nominal Tube OD Wall Thickness Part Number
KF16 (1.18" OD) Cross, 5-Way 304L SS Tooltip 3/4 0.065 QF16-075-5X
KF25 (1.57" OD) Cross, 5-Way 304L SS Tooltip 1 0.065 QF25-100-5X
KF40 (2.16" OD) Cross, 5-Way 304L SS Tooltip 1-1/2 0.065 QF40-150-5X
KF50 (2.95" OD) Cross, 5-Way 304L SS Tooltip 2 0.065 QF50-200-5X

Accessories Table

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

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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.

 

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