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Rotatable-Through Blank (Blind)

Rotatable-Through Blank Flanges: Overview

TFM’s Rotatable-Through Blank Flanges (Blind) are a crucial component in high-vacuum (HV) systems. Designed with flexibility and precision, these flanges provide a robust solution for sealing ports or blind connections in vacuum chambers.

The ISO flange—commonly referred to as “Large ISO”—is widely used in HV applications. These flanges come in two main styles:

  • ISO-K: Utilizes clamp fasteners for quick installation.
  • ISO-F: Employs nut and bolt fasteners for more secure and durable connections.

Compatibility and Design Features

The design of ISO seals mirrors that of KF seals, offering standardized and reliable performance:

  • Metal Centering Ring with O-Ring: The counter-bored or grooved flange face holds a metal centering ring that aligns the flanges and secures an elastomeric o-ring around its outer diameter.
  • Interchangeable Options: Mixed ISO-K and ISO-F connections are possible with appropriate bolt or clamp options, ensuring versatile integration into different systems.

Operating Parameters

ISO flanges are suitable for vacuum applications within these parameters:

  • Temperature Range: Operates efficiently from approximately 0°C to 120–180°C, depending on the o-ring material.
  • Pressure Range: Designed for pressures ranging from atmospheric levels down to ~10⁻⁸ torr or mbar.

TFM’s Rotatable-Through Blank Flanges combine advanced engineering with premium materials, making them the ideal choice for professionals seeking reliability and flexibility in high-vacuum environments.

Ordering Table

Flange Size/OD Type Flange Material Nominal Tube OD (in) Drawing Thickness (in) Minimal Number of Clamps Optimal Number of Clamps Part Number
ISO63-K (3.74") Blank, Clamp Style 304L SS 2-1/2 Tooltip 0.47 3 4 QF63-BK
ISO63-K (3.74") Blank, Clamp Style 6061-T6 Aluminum 2-1/2 Tooltip 0.47 3 4 QF63-ABK
ISO80-K (4.33") Blank, Clamp Style 304L SS 3 Tooltip 0.47 4 8 QF80-BK
ISO80-K (4.33") Blank, Clamp Style 6061-T6 Aluminum 3 Tooltip 0.47 4 8 QF80-ABK
ISO100-K (5.12") Blank, Clamp Style 304L SS 4 Tooltip 0.47 4 8 QF100-BK
ISO100-K (5.12") Blank, Clamp Style 6061-T6 Aluminum 4 Tooltip 0.47 4 8 QF100-ABK
ISO160-K (7.09") Blank, Clamp Style 304L SS 6 Tooltip 0.47 4 8 QF160-BK
ISO160-K (7.09") Blank, Clamp Style 6061-T6 Aluminum 6 Tooltip 0.47 4 8 QF160-ABK
ISO200-K (9.45") Blank, Clamp Style 304L SS 8 Tooltip 0.47 6 12 QF200-BK
ISO200-K (9.45") Blank, Clamp Style 6061-T6 Aluminum 8 Tooltip 0.47 6 12 QF200-ABK
ISO250-K (11.42") Blank, Clamp Style 304L SS 10 Tooltip 0.47 6 12 QF250-BK
ISO250-K (11.42") Blank, Clamp Style 6061-T6 Aluminum 10 Tooltip 0.47 6 12 QF250-ABK
ISO320-K (14.57") Blank, Clamp Style 304L SS 12-3/4 Tooltip 0.67 8 12 QF320-BK
ISO320-K (14.57") Blank, Clamp Style 6061-T6 Aluminum 12-3/4 Tooltip 0.67 8 12 QF320-ABK
ISO400-K (17.72") Blank, Clamp Style 304L SS 16 Tooltip 0.67 8 16 QF400-BK
ISO400-K (17.72") Blank, Clamp Style 6061-T6 Aluminum 16 Tooltip 0.67 8 16 QF400-ABK
ISO500-K (21.65") Blank, Clamp Style 304L SS 20 Tooltip 0.67 12 16 QF500-BK
ISO500-K (21.65") Blank, Clamp Style 6061-T6 Aluminum 20 Tooltip 0.67 12 16 QF500-ABK
ISO630-K (27.17") Blank, Clamp Style 304L SS 24 Tooltip 0.86 14 18 QF630-BK
ISO630-K (27.17") Blank, Clamp Style 6061-T6 Aluminum 24 Tooltip 0.87 14 18 QF630-ABK

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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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