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ISO-K HV Double Clamps (Cold Steel

ISO-K HV Double Clamps (Cold Steel, Zinc Plated)

ISO-K HV Double Clamps (Cold Steel, Zinc Plated): Heavy-Duty Fastening for ISO-K High-Vacuum Flange Systems

ISO-K HV Double Clamps (Cold Steel, Zinc Plated) are industrial-grade fastening components designed specifically for securing ISO-K style vacuum flanges in high-vacuum (HV) systems. These clamps provide a robust and repeatable method of compressing two ISO-K flanges together with a centering ring and o-ring in between, ensuring a leak-tight, high-integrity vacuum seal suitable for pressures down to 10⁻⁸ Torr.

Unlike single clamps, which may be used for both ISO-K and ISO-F connections, ISO-K HV Double Clamps are exclusively engineered for use with ISO-K flanges—the quick-clamp version of large ISO vacuum connections. These flanges feature claw-style ears that accept double clamps positioned 180° apart, enabling fast assembly, even torque distribution, and easy disassembly without specialized tools.

Constructed from cold-rolled steel and finished with zinc plating, these double clamps offer excellent mechanical strength and moderate corrosion resistance. The cold steel body delivers high clamping force, while the zinc coating helps prevent rust during storage or operation in non-corrosive environments. These clamps are a practical solution for industrial vacuum systems, high-vacuum chambers, process vessels, and R&D equipment where both strength and economy are required.

Key Features of ISO-K HV Double Clamps (Cold Steel, Zinc Plated):

  • Designed for ISO-K Flanges Only
    Optimized geometry for clamping ISO-K flanges with matching centering rings and elastomeric o-rings.

  • Material: Cold Steel with Zinc Plating
    Provides strength, durability, and basic surface protection against oxidation.

  • High-Vacuum Compatibility
    Supports system integrity for vacuum levels down to 10⁻⁸ Torr when used with properly sealed ISO flange connections.

  • Quick Assembly & Reusability
    Clamps can be applied or removed quickly by hand or using a standard wrench, making them ideal for modular or reconfigurable vacuum setups.

TFM supplies ISO-K HV Double Clamps (Cold Steel, Zinc Plated) in standard ISO sizes—ISO63, ISO100, ISO160, ISO200, ISO250, ISO320, ISO400, and above. All clamps are precision-machined and quality-inspected to ensure consistent performance, even under repeated use. For users requiring higher corrosion resistance, TFM also offers alternative clamp options in aluminum or stainless steel, suitable for cleanroom or reactive gas applications.

In summary, ISO-K HV Double Clamps (Cold Steel, Zinc Plated) provide a reliable, high-strength fastening method for securing ISO-K flange connections in HV systems. Their heavy-duty construction, ISO standard compliance, and ease of use make them a dependable choice for laboratories, vacuum equipment manufacturers, and industrial system builders alike.

Ordering Table

Flange OD Reference Per Package Material Part Number
ISO63-ISO250 Double Clamps 1 Cold Steel, Zinc Plated QF-LDC-CS1
ISO320-ISO500 Double Clamps 1 Cold Steel, Zinc Plated QF-LDC-CS2
ISO630 Double Clamps 1 Cold Steel, Zinc Plated QF-LDC-CS3

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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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