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Weldable Tube 90° Mitered Elbows

Weldable Elbow Tube Fittings for Semiconductor Applications

Our weldable elbow tube fittings are constructed from high-quality 304 series stainless steel, making them a robust choice for various applications. These fittings are particularly well-suited for use as roughing lines in semiconductor process equipment, as well as foreline and pump exhaust lines within semiconductor subfabs.

Features of Our Weldable Elbows

  • Exceptional Cleanliness: Our fittings provide maximum cleanliness for ultra-high vacuum (UHV) applications, achieving levels greater than 10<sup>-13</sup> Torr. This ensures optimal performance in sensitive environments.
  • Broad Temperature Range: Designed to operate effectively within a temperature range of -200 °C to 450 °C, these weldable elbows can handle various operational conditions.
  • Design Variability: Choose from radius or miter designs to best fit your installation needs, providing flexibility in system configuration.
  • Customizable Options: We offer a range of common wall thicknesses and tube diameters. For specific requirements or inquiries about flanged versions, please reach out to us for tailored solutions.

Enhance your semiconductor processes with our reliable and high-performance weldable elbow tube fittings, engineered to meet the rigorous demands of the industry.

Specifications

Vacuum Range≥ 1×10-13 Torr.
Temperature Range-200° to 450° C

Ordering Table

Drawing WallThickness DimA TubeOD Part Number
Tooltip 0.04 1 0.75 E-075M
Tooltip 0.07 1.88 1 E-100M
Tooltip 0.07 2.25 1.5 E-150M
Tooltip 0.07 2.41 1.5 E-150MH
Tooltip 0.07 3 2 E-200M
Tooltip 0.07 2.61 2 E-200MH
Tooltip 0.07 3 2.5 E-250M
Tooltip 0.07 3.75 2.5 E-250MV
Tooltip 0.07 3.25 3 E-300M
Tooltip 0.08 3.88 4 E-400M
Tooltip 0.08 4.87 4 E-400MV
Tooltip 0.08 4.25 5 E-500M
Tooltip 0.08 5 6 E-600M
Tooltip 0.08 6.06 6 E-600MV
Tooltip 0.12 7 8 E-800M

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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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