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

ASA HV Miter 90° Elbows (Flat Flanges)

ASA HV Miter 90° Elbows (Flat Flanges): Right-Angle Vacuum Routing for Grooved-Flange Integration

ASA HV Miter 90° Elbows (Flat Flanges) from TFM are engineered for use in high-vacuum (HV) systems that require a reliable 90° turn and consistent sealing interface. These elbows are constructed using 304L stainless steel tubing, offering outstanding resistance to corrosion, thermal stress, and aggressive environments common in scientific, semiconductor, and industrial vacuum systems.

Designed in a mitered configuration, these elbows create a sharp right-angle path while minimizing space requirements—ideal for installations where footprint and clearance are critical. Both ports are fitted with rotatable flat ASA flanges, making them ideal for mating with grooved ASA flanges that retain standard o-rings.

This setup conforms to the ASA sexed sealing standard, where a grooved flange holds an elastomeric o-ring and a flat flange compresses against it, forming a vacuum-tight connection.

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

  • Flat ASA Flanges on Both Ends
    Compatible with grooved ASA flanges to form secure o-ring seals—ideal for maintaining vacuum integrity down to 10⁻⁸ Torr.

  • 304L Stainless Steel Construction
    Provides superior mechanical strength, weldability, and corrosion resistance, ensuring long service life in clean and reactive vacuum environments.

  • Mitered 90° Elbow Geometry
    Compact, angular design for precise vacuum routing in tight spaces or complex assemblies.

  • Rotatable Flanges for Installation Flexibility
    Both ASA flat flanges are rotatable, allowing for easy alignment during installation and system maintenance.

  • Vacuum Grade Fabrication
    Each unit is helium leak tested and cleaned to vacuum specifications to ensure consistent performance under demanding conditions.

  • Standard and Customizable Sizing
    Available in common ASA flange sizes including 4″, 6″, 8″, 10″, and 12″, with optional customization in tube length, wall thickness, and flange configuration.

Common Applications:

  • Right-angle connections in ASA-based vacuum plumbing

  • Elbow junctions for pump, gauge, or chamber ports

  • Foreline or exhaust line direction changes

  • Retrofit solutions in modular or confined HV system layouts

  • Precision routing in analytical, aerospace, or thin film deposition platforms

TFM also supplies all compatible hardware, including grooved ASA flanges, o-rings (FKM, Buna-N), bolt kits, and blanking components to support complete vacuum system integration.

In conclusion, ASA HV Miter 90° Elbows (Flat Flanges) offer a reliable, vacuum-tight solution for routing and space optimization in high-vacuum systems using grooved flange mating. With stainless steel construction, rotatable flanges, and compact geometry, they provide both flexibility and durability in critical vacuum environments.

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 AFEM04X15
ASA 1 (4.25" OD) Rotatable Tooltip 1-1/2 3.25 AFEM04X15R
ASA 1.5 (5.00" OD) Fixed Tooltip 1-1/2 3.25 AFEM05X15
ASA 1.5 (5.00" OD) Rotatable Tooltip 1-1/2 3.25 AFEM05X15R
ASA 1.5 (5.00" OD) Fixed Tooltip 2-1/2 3.25 AFEM05X25
ASA 1.5 (5.00" OD) Rotatable Tooltip 2-1/2 3.25 AFEM05X25R
ASA 2 (6.00" OD) Fixed Tooltip 3 5.12 AFEM06X30
ASA 2 (6.00" OD) Rotatable Tooltip 3 5.12 AFEM06X30R
ASA 3 (7.50" OD) Fixed Tooltip 3 5.12 AFEM07X30
ASA 3 (7.50" OD) Rotatable Tooltip 3 5.12 AFEM07X30R
ASA 3 (7.50" OD) Fixed Tooltip 4 5.12 AFEM07X40
ASA 3 (7.50" OD) Rotatable Tooltip 4 5.12 AFEM07X40R
ASA 4 (9.00" OD) Fixed Tooltip 4 5.12 AFEM09X40
ASA 4 (9.00" OD) Rotatable Tooltip 4 5.12 AFEM09X40R
ASA 4 (9.00" OD) Fixed Tooltip 6 5.25 AFEM09X60
ASA 4 (9.00" OD) Rotatable Tooltip 6 5.25 AFEM09X60R
ASA 6 (11.00" OD) Fixed Tooltip 6 6.44 AFEM11X60
ASA 6 (11.00" OD) Rotatable Tooltip 6 6.44 AFEM11X60R
ASA 6 (11.00" OD) Fixed Tooltip 8 7.38 AFEM11X80
ASA 6 (11.00" OD) Rotatable Tooltip 8 7.38 AFEM11X80R
ASA 8 (13.50" OD) Fixed Tooltip 10 9.88 AFEM13X10
ASA 8 (13.50" OD) Rotatable Tooltip 10 9.88 AFEM13X10R
ASA 8 (13.50" OD) Fixed Tooltip 8 7.75 AFEM13X80
ASA 8 (13.50" OD) Rotatable Tooltip 8 7.75 AFEM13X80R
ASA 10 (16.00" OD) Fixed Tooltip 10 9.88 AFEM16X10
ASA 10 (16.00" OD) Rotatable Tooltip 10 9.88 AFEM16X10R

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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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