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ASA HV Radius 90° Elbows (Grooved Flanges)

ASA HV Radius 90° Elbows (Grooved Flanges)

ASA HV Radius 90° Elbows (Grooved Flanges): Smooth, Right-Angle Sealing for High-Vacuum Applications

ASA HV Radius 90° Elbows (Grooved Flanges) from TFM are engineered for high-vacuum (HV) systems where directional transitions must maintain consistent flow and dependable o-ring sealing. Manufactured from high-purity 304L stainless steel, these elbows combine structural integrity, vacuum cleanliness, and reliable sealing performance with a gentle radius bend for minimized conductance loss.

Both ends of the elbow are fitted with rotatable ASA grooved flanges, intended to mate with flat ASA flanges using elastomeric o-rings. This all-grooved configuration is ideal for systems already built around ASA sexed sealing standards, ensuring uniform interface compatibility throughout the vacuum network.

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

  • Dual Grooved ASA Flanges
    Both ports feature rotatable grooved ASA flanges, offering compatibility with standard flat ASA flanges and o-ring sealing. Provides a secure, leak-tight vacuum joint down to 10⁻⁸ Torr.

  • 304L Stainless Steel Construction
    Ensures exceptional corrosion resistance, strength, and thermal stability—ideal for demanding vacuum environments including corrosive gases, elevated temperatures, or cleanroom systems.

  • Smooth Radius Elbow Design
    Minimizes gas turbulence and conductance losses, supporting efficient vacuum pumping and stable process conditions—especially important for instrumentation, coating, and analytical setups.

  • Vacuum Cleaned & Leak Tested
    Every elbow is cleaned to vacuum-grade standards and helium leak tested, ensuring compatibility with high-vacuum operational conditions.

  • Standard and Custom Configurations
    Available in common ASA flange sizes such as 4″, 6″, 8″, 10″, and 12″, with options for custom tube diameters, bend radii, and wall thicknesses based on system requirements.

Common Applications:

  • Smooth vacuum line redirection in HV chambers or forelines

  • Gas delivery or exhaust transitions in analytical or process systems

  • Modular routing in confined geometries requiring grooved ASA terminations

  • Retrofitting ASA-standard vacuum assemblies with minimal flow resistance

  • Research and manufacturing systems with grooved ASA interface standards

TFM also offers a complete range of flat ASA flanges, o-rings (FKM, Buna-N), ASA bolt kits, blanking plates, and custom adapters for full compatibility.

In summary, ASA HV Radius 90° Elbows (Grooved Flanges) provide a robust and flow-optimized right-angle vacuum connection where grooved-to-flat flange compatibility is key. Their stainless steel build, radius bend, and vacuum-tested sealing deliver long-lasting performance across a range of high-vacuum applications.

Ordering Table

Flange Size/OD Type Drawing Nominal Tube OD Dim A Part Number
ASA 1 (4.25" OD) Fixed Tooltip 1-1/2 2.66 AFER04X15GB
ASA 1 (4.25" OD) Rotatable Tooltip 1-1/2 2.66 AFER04X15GBR
ASA 1.5 (5.00" OD) Fixed Tooltip 2 3.25 AFER05X20GB
ASA 1.5 (5.00" OD) Rotatable Tooltip 2 3.25 AFER05X20GBR
ASA 2 (6.00" OD) Fixed Tooltip 3 4.75 AFER06X30GB
ASA 2 (6.00" OD) Rotatable Tooltip 3 4.75 AFER06X30GBR
ASA 3 (7.50" OD) Fixed Tooltip 4 6.25 AFER07X40GB
ASA 3 (7.50" OD) Rotatable Tooltip 4 6.25 AFER07X40GBR
ASA 4 (9.00" OD) Fixed Tooltip 4 6.25 AFER09X40GB
ASA 4 (9.00" OD) Rotatable Tooltip 4 6.25 AFER09X40GBR

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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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