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ASA HV 4-Way Crosses (grooved flanges)

ASA HV 4-Way Crosses (grooved flanges)

SA HV 4-Way Crosses (grooved flanges): Consistent O-Ring Sealing Across All Axes for ASA HV Systems

ASA HV 4-Way Crosses (grooved flanges) from TFM are engineered for precision sealing and robust connectivity in high-vacuum (HV) systems. Constructed from 304L stainless steel tubing, each cross provides four orthogonally aligned access points and features rotatable ASA flanges with grooves on all ports. These grooves are designed to hold standard elastomeric o-rings, which seal against mating flat flanges during system assembly.

This configuration follows the ASA sexed sealing standard, ensuring secure, repeatable vacuum-tight performance when paired with flat ASA flanges and bolted hardware. With consistent grooved flange design across all axes, these crosses are ideal for systems where o-ring compatibility and sealing uniformity are essential.

Key Features of ASA HV 4-Way Crosses (grooved flanges):

  • All Grooved ASA Flanges
    Each of the four ports is equipped with a rotatable grooved flange, optimized for mating with flat ASA flanges using standard o-rings. This configuration supports leak-tight sealing down to 10⁻⁸ Torr.

  • 304L Stainless Steel Construction
    Delivers exceptional strength, corrosion resistance, and vacuum cleanliness—suitable for both industrial and research-grade environments, including chemically reactive or high-temperature processes.

  • Rotatable Flange Design
    Enables easier alignment during installation and allows for flexible orientation in tight or complex setups.

  • Vacuum-Grade Tested and Cleaned
    Every ASA HV 4-Way Cross (grooved flanges) is helium leak tested and cleaned to meet high-vacuum standards, ensuring reliable integration into sensitive systems.

  • Standard and Customizable Configurations
    Available in standard ASA sizes such as 4″, 6″, 8″, 10″, and 12″, with options for reducer crosses, non-standard tube lengths, and application-specific designs available upon request.

Common Applications:

  • Vacuum chamber port distribution for instrumentation or access

  • Diagnostic or pumping nodes in foreline assemblies

  • Multi-axis gas injection or sampling points

  • Retrofit upgrades to ASA-based HV systems requiring consistent grooved interfaces

  • Modular assemblies in research labs, semiconductor tools, or space simulation systems

TFM also provides matching flat ASA flanges, FKM or Buna-N o-rings, bolt sets, and blank-off plates to ensure full compatibility and streamlined installation.

In conclusion, ASA HV 4-Way Crosses (grooved flanges) offer consistent o-ring sealing across all ports, ideal for vacuum engineers building symmetrical, leak-tight systems. With rotatable flanges and stainless steel strength, these crosses support long-term performance in any high-vacuum infrastructure.

Ordering Table

Flange Size/OD Drawing Nominal Tube OD Dim A Part Number
ASA 1 (4.25" OD) Tooltip 1-1/2 2.5 AF4C04X15G5R
ASA 1.5 (5.00" OD) Tooltip 2 3.25 AF4C05X20G5R
ASA 1.5 (5.00" OD) Tooltip 2-1/2 3.25 AF4C05X25G5R
ASA 2 (6.00" OD) Tooltip 3 3.5 AF4C06X30G5R
ASA 3 (7.50" OD) Tooltip 4 5.12 AF4C07X40G5R
ASA 4 (9.00" OD) Tooltip 4 5.12 AF4C09X40G5R
ASA 4 (9.00" OD) Tooltip 6 5.25 AF4C09X60G5R
ASA 6 (11.00" OD) Tooltip 6 6.44 AF4C11X60G5R
ASA 6 (11.00" OD) Tooltip 8 7.38 AF4C11X80G5R
ASA 8 (13.50" OD) Tooltip 10 9.88 AF4C13X10G5R
ASA 8 (13.50" OD) Tooltip 8 7.75 AF4C13X80G5R
ASA 10 (16.00" OD) Tooltip 10 9.88 AF4C16X10G5R

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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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