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ASA HV Radius 90° Elbows (Grooved Flanges)

ASA HV Radius 90° Elbows (Grooved & Flat Flanges)

ASA HV Radius 90° Elbows (Grooved & Flat Flanges): Smooth Flow and Secure Sealing for Right-Angle Vacuum Routing

ASA HV Radius 90° Elbows (Grooved & Flat Flanges) from TFM provide a high-integrity solution for vacuum systems requiring a gentle 90-degree transition while maintaining leak-tight performance. These elbows are fabricated from 304L stainless steel tubing and equipped with ASA-standard flanges, making them well-suited for use in high-vacuum (HV) applications across scientific, industrial, and semiconductor environments.

The radius elbow design offers a smooth internal curve, minimizing turbulence and conductance losses—ideal for sensitive processes such as mass spectrometry, surface science, or plasma deposition systems.

Each port is outfitted with a rotatable ASA flange, one grooved for holding an elastomeric o-ring and one flat for compressive sealing. This sexed flange configuration ensures repeatable, vacuum-tight sealing down to 10⁻⁸ Torr when properly assembled.

Key Features of ASA HV Radius 90° Elbows (Grooved & Flat Flanges):

  • Radius Bend Geometry
    Reduces flow resistance and particle entrapment, ensuring smooth gas conductance and minimal turbulence in process-critical vacuum lines.

  • 304L Stainless Steel Construction
    Provides corrosion resistance, thermal stability, and long-term mechanical durability in demanding vacuum environments.

  • Rotatable ASA Flanges (Grooved & Flat)
    Enables secure mating via o-ring sealing and allows easy alignment during system integration. Conforms to ASA sexed sealing standards.

  • Vacuum-Tested and Cleanroom Ready
    All ASA HV Radius 90° Elbows (Grooved & Flat Flanges) are helium leak tested and vacuum cleaned, suitable for pressures as low as 10⁻⁸ Torr.

  • Standard and Custom Options
    Offered in ASA sizes like 4″, 6″, 8″, 10″, and 12″, with customizable tube lengths, bend radii, and flange orientations available upon request.

Common Applications:

  • Smooth directional changes in HV forelines or process lines

  • Exhaust or pump routing in sensitive vacuum systems

  • Right-angle transitions with minimized gas turbulence

  • Modular upgrades or retrofits in ASA-standard architectures

  • Research, semiconductor, or clean energy vacuum applications

TFM also supplies matching ASA o-rings (FKM, Buna-N), bolt kits, flat/grooved flange blanks, and custom adapters for seamless system integration.

In conclusion, ASA HV Radius 90° Elbows (Grooved & Flat Flanges) offer a refined solution for right-angle vacuum routing with secure o-ring sealing and flow-optimized geometry. With stainless steel strength and customizable options, they support precision vacuum environments with reliability and flexibility.

ASA Elbows Features:

Flange Size/OD Type Drawing Nominal Tube OD Dim A Part Number
ASA 1 (4.25" OD) Fixed Tooltip 1-1/2 2.66 AFER04X15G
ASA 1 (4.25" OD) Rotatable Tooltip 1-1/2 2.66 AFER04X15GR
ASA 1.5 (5.00" OD) Fixed Tooltip 2 3.25 AFER05X20G
ASA 1.5 (5.00" OD) Rotatable Tooltip 2 3.25 AFER05X20GR
ASA 2 (6.00" OD) Fixed Tooltip 3 4.75 AFER06X30G
ASA 2 (6.00" OD) Rotatable Tooltip 3 4.75 AFER06X30GR
ASA 3 (7.50" OD) Fixed Tooltip 4 6.25 AFER07X40G
ASA 3 (7.50" OD) Rotatable Tooltip 4 6.25 AFER07X40GR
ASA 4 (9.00" OD) Fixed Tooltip 4 6.25 AFER09X40G
ASA 4 (9.00" OD) Rotatable Tooltip 4 6.25 AFER09X40GR

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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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