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ASA HV 5-Way Crosses (grooved & flat flanges)

ASA HV 5-Way Crosses (flat flanges)

ASA HV 5-Way Crosses (flat flanges): Modular Vacuum Connectivity with Flat ASA Flange Terminations

ASA HV 5-Way Crosses (flat flanges) from TFM are high-performance components tailored for complex high-vacuum (HV) systems requiring five-point expansion with standardized ASA connections. Made from 304L stainless steel tubing, these crosses are engineered to deliver corrosion resistance, vacuum integrity, and long-term reliability under demanding operating conditions.

Each of the five orthogonal ports is fitted with a rotatable flat ASA flange, designed specifically to mate with a grooved ASA flange using an elastomeric o-ring. This approach follows the sexed ASA flange system, where the flat flange provides a smooth sealing surface, while the opposing grooved flange holds the o-ring securely in place. The result is a leak-tight seal ideal for vacuum levels down to 10⁻⁸ Torr.

Key Features of ASA HV 5-Way Crosses (flat flanges):

  • All-Flat ASA Flanges
    Each port is equipped with a rotatable flat ASA flange, enabling seamless integration with grooved ASA flanges already equipped with o-rings.

  • 304L Stainless Steel Construction
    Offers exceptional mechanical strength, thermal stability, and corrosion resistance—suitable for cleanroom, semiconductor, and industrial vacuum environments.

  • Rotatable Flange Design
    Allows easy alignment of each flange during system installation, especially in constrained or asymmetric layouts.

  • Vacuum Integrity Assured
    All ASA HV 5-Way Crosses (flat flanges) are helium leak tested and cleaned to vacuum-grade specifications to ensure high performance with minimal outgassing.

  • Standard and Custom Fabrication
    Available in ASA sizes such as 4″, 6″, 8″, 10″, and 12″, with options for custom lengths, flange combinations, or reducer ports to meet specialized application needs.

Common Applications:

  • Central distribution hub in HV chamber assemblies

  • Multi-directional feedthroughs or gas injection interfaces

  • Foreline or exhaust manifolds in process systems

  • Modular vacuum setups for R&D and test platforms

  • Retrofit upgrades to expand ASA-based networks

TFM also provides compatible accessories for full-system implementation, including ASA grooved flanges, FKM and Buna-N o-rings, bolt kits, blank flanges, and custom adapters, making installation efficient and reliable.

In conclusion, ASA HV 5-Way Crosses (flat flanges) are the ideal choice when your system requires multiple flat-face connections to mate with o-ring-seated grooved ASA flanges. With stainless steel construction, rotatable design, and full ASA compliance, these crosses bring modularity and vacuum performance to advanced HV infrastructures.

Ordering Table

Flange Size/OD Drawing Nominal Tube OD Dim A Part Number
ASA 1 (4.25" OD) Tooltip 1-1/2 2.5 AF5C04X15R
ASA 1.5 (5.00" OD) Tooltip 2 2.5 AF5C05X20R
ASA 1.5 (5.00" OD) Tooltip 2-1/2 2.5 AF5C05X25R
ASA 2 (6.00" OD) Tooltip 3 3.5 AF5C06X30R
ASA 3 (7.50" OD) Tooltip 4 5.12 AF5C07X40R
ASA 4 (9.00" OD) Tooltip 4 5.12 AF5C09X40R
ASA 4 (9.00" OD) Tooltip 6 5.25 AF5C09X60R
ASA 6 (11.00" OD) Tooltip 6 5.38 AF5C11X60R
ASA 6 (11.00" OD) Tooltip 8 7.38 AF5C11X80R
ASA 8 (13.50" OD) Tooltip 10 9.88 AF5C13X10R
ASA 8 (13.50" OD) Tooltip 8 7.38 AF5C13X80R
ASA 10 (16.00" OD) Tooltip 10 9.88 AF5C16X10R

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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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