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ASA HV 4-Way Crosses (grooved flanges)

ASA HV 4-Way Crosses (flat flanges)

ASA HV 4-Way Crosses (flat flanges): Four-Port Vacuum Connectivity with All-Flat ASA Flanges for O-Ring Mating

ASA HV 4-Way Crosses (flat flanges) from TFM are engineered to provide consistent, sexed flange sealing in high-vacuum (HV) environments where grooved ASA flanges with o-rings are already in place. Fabricated from 304L stainless steel tubing, these crosses feature flat ASA flanges on all four orthogonal ports—making them ideal for mating with grooved flanges in systems that require secure, repeatable vacuum seals.

Each port is equipped with a rotatable flat flange, allowing precise alignment during assembly. This configuration supports vacuum compatibility down to 10⁻⁸ Torr and is well-suited for both industrial and laboratory use where cleanliness, mechanical strength, and system flexibility are key.

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

  • All-Flat ASA Flange Design
    Each of the four ports is fitted with a rotatable flat ASA flange, which pairs with grooved flanges that retain an elastomeric o-ring. This sealing method is trusted across high-vacuum systems for its simplicity and reliability.

  • 304L Stainless Steel Tubing
    Ensures structural integrity, corrosion resistance, and long-term durability under thermal stress, aggressive gas environments, or frequent cycling.

  • Rotatable Flanges for Easy Alignment
    All flanges can be freely rotated to simplify installation and allow better orientation control in compact or custom assemblies.

  • Leak-Tested and Vacuum Cleaned
    Every ASA HV 4-Way Cross (flat flanges) is helium leak tested and cleaned to vacuum service standards, supporting ultra-clean applications.

  • Available in Standard and Custom Sizes
    Offered in common ASA flange sizes (4″, 6″, 8″, 10″, 12″), with custom tube lengths, wall thicknesses, and reducer configurations available upon request.

Common Applications:

  • Expansion of ASA vacuum systems using grooved flange standards

  • Diagnostic access ports and gas inlet/exhaust junctions

  • Multi-direction vacuum chamber interconnections

  • Foreline distribution hubs for HV systems

  • Modular assemblies in cleanrooms, analytical labs, or pilot lines

To complete your setup, TFM provides matching grooved ASA flanges, FKM or Buna-N o-rings, bolt kits, and blank flanges—ensuring full compatibility with ASA-style vacuum infrastructure.

In summary, ASA HV 4-Way Crosses (flat flanges) are the ideal solution for building or modifying high-vacuum assemblies where grooved flange interfaces and o-ring sealing are the standard. With rotatable flat flanges and stainless steel strength, these crosses provide dependable vacuum integrity in every direction.

ASA HV 4-Way Crosses (flat flanges)

Flange Size/OD Drawing Nominal Tube OD Dim A Part Number
ASA 1 (4.25" OD) Tooltip 1-1/2 2.5 AF4C04X15R
ASA 1.5 (5.00" OD) Tooltip 2 3.25 AF4C05X20R
ASA 1.5 (5.00" OD) Tooltip 2-1/2 3.25 AF4C05X25R
ASA 2 (6.00" OD) Tooltip 3 3.5 AF4C06X30R
ASA 3 (7.50" OD) Tooltip 4 5.12 AF4C07X40R
ASA 4 (9.00" OD) Tooltip 4 5.12 AF4C09X40R
ASA 4 (9.00" OD) Tooltip 6 5.25 AF4C09X60R
ASA 6 (11.00" OD) Tooltip 6 6.44 AF4C11X60R
ASA 6 (11.00" OD) Tooltip 8 7.38 AF4C11X80R
ASA 8 (13.50" OD) Tooltip 10 9.88 AF4C13X10R
ASA 8 (13.50" OD) Tooltip 8 7.75 AF4C13X80R
ASA 10 (16.00" OD) Tooltip 10 9.88 AF4C16X10R

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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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