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Manual SS Sapphire-Sealed Variable Leak Valve (CF Flanged)

Bakeable Leak Valves Overview

Bakeable leak valves are designed to manage the flow of gas into a vacuum system from an external source. They utilize a soft metal pad compressed against a harder metal seat, ensuring a reliable seal for accurate gas flow control.

Typical Applications

  • Argon processing
  • Sputtering
  • System purging
  • Precision gas control
  • Laser back-filling

Key Features

  • Constructed from stainless steel, sapphire, and copper alloy for enhanced durability and longevity.
  • Maximum inlet pressure of 34 bar.
  • Operating pressure range from 1 bar to 10⁻¹¹ Torr.
  • Offers an extremely precise control mechanism for accurate flow regulation.
  • Capable of being baked out to 450°C in either an open or closed position.
  • User-serviceable design for easy maintenance.

Specifications Table

ManufacturerTFM
PressureTorr
1.000 x 10-10 Torr
mbar
1.330 x 10-10 mbar
atm
1.00 atm
RatesControlled Leak Rate
1.330 x 10-9 mbar*L/s
1.000 x 10-9 Torr*L/s
Max Flow
6.00 L/min
TemperatureBakeable
450 ºC
842 ºF
Valve Body
Material		304L SS

Ordering Table

Drawing Inlet Flange Size Outlet Flange Size Part Number
Tooltip DN16CF (1.33" OD) DN35CF-DN40CF (2.75" OD) AMLV1635CF

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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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