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ISO250 HV Flanges

The ISO flange, commonly referred to as Large ISO, is a vital component for high-vacuum (HV) chamber ports. TFM’s ISO250 HV Flanges are expertly engineered to provide durable and reliable performance in demanding vacuum environments.

Flange Styles Available:

  • ISO-K: Uses clamp fasteners for quick and efficient assembly.
  • ISO-F: Secured with nut and bolt fasteners for a robust, dependable connection.

Compatibility with Mixed Joints:

ISO250 HV Flanges offer flexible connection solutions, allowing joints between ISO-K and ISO-F styles using a variety of bolt and clamp options.

Design and Seal Characteristics:

The design principles of ISO flanges mirror those of KF seals:

  • Each flange face is counter-bored or grooved to hold a metal centering ring with an elastomeric o-ring around its outer diameter.
  • The centering ring ensures precise alignment and secures the o-ring for consistent, leak-free sealing.

Application Parameters:

  • Temperature Range: ~0°C to 120–180°C, depending on the o-ring material properties.
  • Pressure Range: Atmosphere to ~10⁻⁸ torr or mbar.

TFM’s ISO250 HV Flanges are built to meet the high standards of modern vacuum systems. For standard or custom solutions tailored to your specific needs, reach out to us today!

Ordering Table

Flange Size/OD Type Flange Material Drawing Nominal Tube OD Bore Counter Bore Thickness Bolt Circle Dia. Bolt Hole Dia. # of Bolt Holes Minimal Number of Clamps Part Number
ISO250-F (13.19" OD) Blank, Bolt Style 6061-T6 Aluminum Tooltip 10 — — 0.63 12.205 0.433 12 — QF250-ABF
ISO250-F (13.19" OD) Bored, Bolt Style 304L SS Tooltip 10 9.88 10.020 0.63 12.205 0.433 12 — QF250-SWF
ISO250-F (13.19" OD) Blank, Bolt Style 304L SS Tooltip 10 — — 0.63 12.205 0.433 12 — QF250-BF
ISO250-F (13.19" OD) Bored, Bolt Style 316L SS Tooltip 10-1/2 10.276 10.530 0.63 12.205 0.433 12 — QF250-SWF-M
ISO250-K (11.42" OD) Blank, Clamp Style 6061-T6 Aluminum Tooltip 10 — — 0.47 — — — 6 QF250-ABK
ISO250-K (11.42" OD) Blank, Clamp Style 304L SS Tooltip 10 — — 0.47 — — — 6 QF250-BK
ISO250-K (11.42" OD) Bored, Clamp Style 304L SS Tooltip 10 9.88 10.020 0.47 — — — 6 QF250-SWK
ISO250-K (11.42" OD) Bored, Clamp Style 316L SS Tooltip 10-1/2 10.276 10.530 0.47 — — — 6 QF250-SWK-M

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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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