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ASA HV 4-Way Crosses (flat flanges)

TFM fabricates these ASA crosses using 304L stainless steel tubing and ASA flanges. Designed for high vacuum (HV) applications, ASA flanges provide simple, sexed vacuum seals, with one flange grooved to accommodate an o-ring and the other being smooth (flat).

Features of ASA Crosses:

  • Durable Construction: Made from 304L stainless steel for long-lasting performance.
  • Rotatable Flange Options: Each axis features one rotatable flange, available in various combinations of flat and grooved designs.
  • Adaptable Sizes: Reducer crosses allow for the connection of two different flange sizes.
  • Customizable Lengths and Diameters: Common lengths and tube diameters are readily available; please reach out to us for specific requirements tailored to your needs.

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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