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

ASA HV Miter 90° Elbows (Grooved Flanges)

ASA HV Miter 90° Elbows (Grooved Flanges): High-Vacuum Elbows with All-Grooved Flange Sealing for O-Ring Interfaces

ASA HV Miter 90° Elbows (Grooved Flanges) by TFM are engineered for high-vacuum (HV) applications that demand precise 90-degree transitions with standardized o-ring sealing. Fabricated from 304L stainless steel tubing, these elbows offer high strength, vacuum integrity, and resistance to corrosive environments commonly encountered in advanced vacuum systems.

Each port on the elbow features a rotatable grooved ASA flange, designed to seat an elastomeric o-ring and mate securely with a flat ASA flange counterpart. This all-grooved configuration is ideal when integrating with flat flange interfaces throughout a vacuum system.

The mitered elbow design offers a sharp 90° directional turn using a welded angular cut, minimizing space usage and allowing for more compact routing compared to radius elbows.

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

  • Grooved ASA Flanges on Both Ends
    Enables secure mating with flat ASA flanges using o-ring sealing. Ideal for ASA vacuum systems designed around sexed flange standards.

  • 304L Stainless Steel Fabrication
    Provides excellent chemical resistance, mechanical integrity, and vacuum compatibility—suitable for ultra-high vacuum and process gas environments.

  • Mitered 90° Geometry
    Optimizes space with an angular weld cut, allowing tight directional routing in crowded vacuum assemblies.

  • Rotatable Flanges for Easy Alignment
    Both flanges are rotatable to ease installation and allow precise alignment during setup.

  • Vacuum Integrity and Leak Testing
    All ASA HV Miter 90° Elbows (Grooved Flanges) are cleaned to vacuum-grade standards and helium leak tested, ensuring they can maintain pressures as low as 10⁻⁸ Torr.

  • Standard and Custom Sizes Available
    Offered in common ASA sizes such as 4″, 6″, 8″, 10″, and 12″, with support for custom tube lengths, wall thicknesses, and flange modifications upon request.

Common Applications:

  • 90° redirection between flat-flanged ASA components

  • Space-constrained vacuum manifold transitions

  • Right-angle feedthroughs or gas injection paths

  • Pumping line changes in high-vacuum chambers

  • Modular upgrades in research or manufacturing vacuum setups

TFM also provides compatible flat ASA flanges, o-rings (FKM, Buna-N), bolt sets, and blank-off plates to ensure seamless integration into your ASA-based vacuum infrastructure.

In summary, ASA HV Miter 90° Elbows (Grooved Flanges) provide a compact and reliable solution for high-vacuum systems requiring consistent grooved-to-flat o-ring sealing. With stainless steel construction and rotatable alignment, they offer trusted performance and adaptability in advanced 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 3.25 AFEM04X15GB
ASA 1 (4.25" OD) Rotatable Tooltip 1-1/2 3.25 AFEM04X15GBR
ASA 1.5 (5.00" OD) Fixed Tooltip 1-1/2 3.25 AFEM05X15GB
ASA 1.5 (5.00" OD) Rotatable Tooltip 1-1/2 3.25 AFEM05X15GBR
ASA 1.5 (5.00" OD) Fixed Tooltip 2-1/2 3.25 AFEM05X25GB
ASA 1.5 (5.00" OD) Rotatable Tooltip 2-1/2 3.25 AFEM05X25GBR
ASA 2 (6.00" OD) Fixed Tooltip 3 5.12 AFEM06X30GB
ASA 2 (6.00" OD) Rotatable Tooltip 3 5.12 AFEM06X30GBR
ASA 3 (7.50" OD) Fixed Tooltip 3 5.12 AFEM07X30GB
ASA 3 (7.50" OD) Rotatable Tooltip 3 5.12 AFEM07X30GBR
ASA 3 (7.50" OD) Fixed Tooltip 4 5.12 AFEM07X40GB
ASA 3 (7.50" OD) Rotatable Tooltip 4 5.12 AFEM07X40GBR
ASA 4 (9.00" OD) Fixed Tooltip 4 5.12 AFEM09X40GB
ASA 4 (9.00" OD) Rotatable Tooltip 4 5.12 AFEM09X40GBR
ASA 4 (9.00" OD) Fixed Tooltip 6 5.25 AFEM09X60GB
ASA 4 (9.00" OD) Rotatable Tooltip 6 5.25 AFEM09X60GBR
ASA 6 (11.00" OD) Fixed Tooltip 6 6.44 AFEM11X60GB
ASA 6 (11.00" OD) Rotatable Tooltip 6 6.44 AFEM11X60GBR
ASA 6 (11.00" OD) Fixed Tooltip 8 7.38 AFEM11X80GB
ASA 6 (11.00" OD) Rotatable Tooltip 8 7.38 AFEM11X80GBR
ASA 8 (13.50" OD) Fixed Tooltip 10 9.88 AFEM13X10GB
ASA 8 (13.50" OD) Rotatable Tooltip 10 9.88 AFEM13X10GBR
ASA 8 (13.50" OD) Fixed Tooltip 8 7.75 AFEM13X80GB
ASA 8 (13.50" OD) Rotatable Tooltip 8 7.75 AFEM13X80GBR
ASA 10 (16.00" OD) Fixed Tooltip 10 9.88 AFEM16X10GB
ASA 10 (16.00" OD) Rotatable Tooltip 10 9.88 AFEM16X10GBR

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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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