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

Bakeable leak valves are used to control the flow of gas into a vacuum system from an external source. A soft metal pad is compressed against a harder metal seat, creating the necessary seal for precise gas flow control.

  • Typical applications include argon processing, sputtering, system purging, precision gas control, and laser back-filling
  • Stainless steel, sapphire and copper alloy construction for long life
  • Inlet pressure to 34 bar maximum
  • Operating pressure from 1 bar to 10-11 Torr
  • Extremely precise control mechanism
  • Bakeable to 450°C in either open or closed position
  • User serviceable

Specifications Table

Pressure Torr
1.000 x 10-10 Torr
1.330 x 10-10 mbar
1.00 atm
Rates Controlled Leak Rate
1.330 x 10-9 mbar*L/s
1.000 x 10-9 Torr*L/s
Max Flow
6.00 L/min
Temperature Bakeable
450 ºC
842 ºF

Valve Body
304L SS
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  • No leak detectable on a helium mass spectrometer leak detector with sensitivity of 1 ×10-10 std cc/sec.

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Ordering Table

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Flange Selection Guide
With a variety of flanges to choose from, the Flange Selection Guide is designed to help you find one to meet your vacuum requirements. Shop Now!
Can't find the flange you need or want a custom configuration? Please call us at +1 412 387 9200 or email with your inquiry.
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Contact Us - Manual SS Sapphire-Sealed Variable Leak Valve (CF Flanged)