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Miter 90° Elbows (ISO-K HV)

Miter 90° Elbows

Miter 90° Elbows are precision-engineered fittings designed to facilitate smooth directional changes in vacuum, gas, and fluid systems. These elbows are commonly used in high-vacuum (HV), ultra-high-vacuum (UHV), and industrial pipeline applications where minimal flow resistance and high structural integrity are required.

Key Features

  • Material Options: Manufactured from high-grade stainless steel (304L, 316L) or other alloys for superior corrosion resistance and durability.

  • Smooth Internal Finish: Ensures minimal turbulence and pressure drop, optimizing flow efficiency.

  • Precision Welding: Seamlessly joined for high-vacuum compatibility and structural integrity.

  • Standard and Custom Sizes: Available in multiple diameters, wall thicknesses, and connection types to meet specific system requirements.

  • Vacuum and Pressure Compatibility: Suitable for HV/UHV vacuum applications, fluid handling, and gas transport.

Applications

  • Vacuum Systems: Used in HV/UHV chambers, semiconductor fabrication, and research laboratories.

  • Industrial Piping: Applied in chemical processing, power plants, and oil & gas industries.

  • Thin Film Deposition: Essential for PVD, CVD, and sputtering systems.

  • Aerospace and Defense: Used in high-performance fluid and gas transport systems.

Why Choose TFM’s Miter 90° Elbows?

  • Precision-engineered for vacuum and high-pressure applications

  • Superior corrosion resistance and durability

  • Custom sizes and configurations available upon request

Ordering Table

Flange Size/OD Type Flange Material Drawing Nominal Tube OD Dim A Part Number
ISO63-K (3.74" OD) Elbow, 90 Degree Mitered 304L SS Tooltip 2-1/2 3.46 QF63-E90K
ISO80-K (4.33" OD) Elbow, 90 Degree Mitered 304L SS Tooltip 3 3.86 QF80-E90K
ISO100-K (5.12" OD) Elbow, 90 Degree Mitered 304L SS Tooltip 4 4.25 QF100-E90K
ISO160-K (7.09" OD) Elbow, 90 Degree Mitered 304L SS Tooltip 6 5.43 QF160-E90K
ISO200-K (9.45" OD) Elbow, 90 Degree Mitered 304L SS Tooltip 8 6.61 QF200-E90K
ISO250-K (11.42" OD) Elbow, 90 Degree Mitered 304L SS Tooltip 10 8.19 QF250-E90K

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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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