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ISO-K to ASA Adapter Flanges—Flat & Grooved

ISO-K to ASA Adapter Flanges—Flat & Grooved: Precision Interface Between Two Vacuum Standards

ISO-K to ASA Adapter Flanges—Flat & Grooved from TFM are engineered to seamlessly connect ISO-K flange systems with ASA flanges, enabling cross-platform compatibility in high vacuum assemblies. Manufactured from high-quality 304 stainless steel tubing and flanges, these adapters provide structural integrity, corrosion resistance, and vacuum sealing performance suitable for demanding industrial and research environments.

These flange adapters are available in configurations where one side terminates in an ISO-K flange, while the other matches either a flat ASA flange or a grooved ASA flange. This allows direct mating of different flange standards without extensive rework or welding, simplifying system integration or retrofitting.

Key Features of ISO-K to ASA Adapter Flanges—Flat & Grooved:

  • Dual Standard Compatibility
    Designed to connect ISO-K flanges with ASA flanges, these adapters allow systems built on different international flange standards to operate cohesively.

  • Flat & Grooved ASA Options
    Available with either flat-face ASA flanges or grooved ASA flanges to suit your o-ring sealing requirements and vacuum hardware configurations.

  • 304 Stainless Steel Construction
    Fabricated from vacuum-rated 304 series stainless steel, these flanges provide excellent chemical resistance, weldability, and mechanical strength under vacuum or mild pressure.

  • Reliable Vacuum Performance
    When used with the appropriate gaskets, clamps, or bolts, these ISO-K to ASA Adapter Flanges—Flat & Grooved deliver dependable performance in HV and light UHV systems.

  • Compact, Weld-Free Integration
    Simplifies vacuum system adaptation without requiring welding or custom hardware—ideal for retrofits, test rigs, and modular builds.

Applications:

  • Integrating ASA-flanged vacuum chambers with ISO-K forelines or pumps

  • Adapting ISO-standard instrumentation to ASA flange ports

  • Converting legacy ASA systems to ISO-K infrastructure

  • Bridging international equipment and accessories in hybrid vacuum systems

  • Supporting rapid prototyping or lab-scale test benches

TFM also offers a full range of ISO-K flanges, ASA components, weld stubs, and cross-platform adapters—ensuring seamless connectivity across global vacuum standards.

Ordering Table

Flange Size/OD Type Drawing Nominal Tube OD ASA Flange OD Dim A Part Number
ISO100-K (5.12" OD) Flat Tooltip 4 11 4.19 QF100XASA11
ISO100-K (5.12" OD) Grooved Tooltip 4 11 4.19 QF100XASA11G
ISO100-K (5.12" OD) Flat Tooltip 3 6 4.19 QF100XASA6
ISO100-K (5.12" OD) Flat Tooltip 4 7.5 4.19 QF100XASA7
ISO100-K (5.12" OD) Grooved Tooltip 4 7.5 4.19 QF100XASA7G
ISO100-K (5.12" OD) Flat Tooltip 4 9 4.19 QF100XASA9
ISO100-K (5.12" OD) Grooved Tooltip 4 9 4.19 QF100XASA9G
ISO160-K (7.09" OD) Flat Tooltip 6 11 4.31 QF160XASA11
ISO160-K (7.09" OD) Grooved Tooltip 6 11 4.31 QF160XASA11G
ISO160-K (7.09" OD) Flat Tooltip 6 9 4.31 QF160XASA9
ISO160-K (7.09" OD) Grooved Tooltip 6 9 4.31 QF160XASA9G
ISO200-K (9.45" OD) Flat Tooltip 8 11 4.31 QF200XASA11
ISO200-K (9.45" OD) Grooved Tooltip 8 11 4.31 QF200XASA11G
ISO63-K (3.74" OD) Flat Tooltip 2-1/2 6 4.19 QF63XASA6
ISO63-K (3.74" OD) Grooved Tooltip 2-1/2 6 4.19 QF63XASA6G
ISO63-K (3.74" OD) Flat Tooltip 2-1/2 7.5 4.19 QF63XASA7
ISO80-K (4.33" OD) Flat Tooltip 3 6 4.19 QF80XASA6
ISO80-K (4.33" OD) Flat Tooltip 3 7.5 4.19 QF80XASA7
ISO80-K (4.33" OD) Grooved Tooltip 3 7.5 4.19 QF80XASA7G
ISO250-K (11.42" OD) Grooved Tooltip 8 11 4.32 QF250XASA11G

Accessories Table

Description For Per Package Part Number Description
Double Clamps (Aluminum) ISO63 - ISO100 "K" Flanges 1 QF-SDC-AL1 Double Clamps (Aluminum)
Double Clamps (Aluminum) ISO160 - ISO250 "K" Flanges 1 QF-SDC-AL2 Double Clamps (Aluminum)
Double Clamps (Aluminum) ISO320 - ISO500 "K" Flanges 1 QF-SDC-AL3 Double Clamps (Aluminum)
O-Rings (Fluorocarbon) Size 1 ASA Flanges 1 O-V223 O-Rings (Fluorocarbon)
O-Rings (Fluorocarbon) Size 1.5 ASA Flanges 1 O-V231 O-Rings (Fluorocarbon)
O-Rings (Fluorocarbon) Size 2 ASA Flanges 1 O-V238 O-Rings (Fluorocarbon)
O-Rings (Fluorocarbon) Size 3 ASA Flanges 1 O-V247 O-Rings (Fluorocarbon)
O-Rings (Fluorocarbon) Size 4 ASA Flanges 1 O-V258 O-Rings (Fluorocarbon)
O-Rings (Fluorocarbon) Size 6 ASA Flanges 1 O-V266 O-Rings (Fluorocarbon)
O-Rings (Fluorocarbon) Size 8 ASA Flanges 1 O-V274 O-Rings (Fluorocarbon)
O-Rings (Fluorocarbon) Size 10 ASA Flanges 1 O-V278 O-Rings (Fluorocarbon)
Bolt Sets, 9/16—12 x 1.50" Size 1 ASA & 1.5 ASA Flanges 4 HBS563121504 Bolt Sets, 9/16—12 x 1.50"
Bolt Sets, 5/8—11 x 1.75" Size 2 ASA & 3 ASA Flanges 4 HBS625111754 Bolt Sets, 5/8—11 x 1.75"
Bolt Sets, 5/8—11 x 1.75" Size 4 ASA Flanges 8 HBS625111758 Bolt Sets, 5/8—11 x 1.75"
Bolt Sets, 3/4—10 x 2.50" Size 6 ASA & 8 ASA Flanges 8 HBS751025008 Bolt Sets, 3/4—10 x 2.50"
Bolt Sets, 3/4—10 x 2.50" Size 10 ASA Flanges 12 HBS751025012 Bolt Sets, 3/4—10 x 2.50"
Centering Ring (SS with Fluorocarbon O-Ring) ISO63 "K" Flanges 1 QF63-SAVR Centering Ring (SS with Fluorocarbon O-Ring)
Centering Ring (SS with Fluorocarbon O-Ring) ISO80 "K" Flanges 1 QF80-SAVR Centering Ring (SS with Fluorocarbon O-Ring)
Centering Ring (SS with Fluorocarbon O-Ring) ISO100 "K" Flanges 1 QF100-SAVR Centering Ring (SS with Fluorocarbon O-Ring)
Centering Ring (SS with Fluorocarbon O-Ring) ISO160 "K" Flanges 1 QF160-SAVR Centering Ring (SS with Fluorocarbon O-Ring)
Centering Ring (SS with Fluorocarbon O-Ring) ISO200 "K" Flanges 1 QF200-SAVR Centering Ring (SS with Fluorocarbon O-Ring)
Centering Ring (SS with Fluorocarbon O-Ring) ISO250 "K" Flanges 1 QF250-SAVR Centering Ring (SS with Fluorocarbon O-Ring)
Centering Ring (SS with Fluorocarbon O-Ring) ISO320 "K" Flanges 1 QF320-SAVR Centering Ring (SS with Fluorocarbon O-Ring)
Centering Ring (SS with Fluorocarbon O-Ring) ISO400 "K" Flanges 1 QF400-SAVR Centering Ring (SS with Fluorocarbon O-Ring)
Centering Ring (SS with Fluorocarbon O-Ring) ISO500 "K" Flanges 1 QF500-SAVR Centering Ring (SS with Fluorocarbon O-Ring)
Centering Ring (SS with Fluorocarbon O-Ring) ISO630 "K" Flanges 1 QF630-SAVR Centering Ring (SS with Fluorocarbon O-Ring)

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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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