Please select your country or region to be
directed to the appropriate Lesker site.

Representative Image

CF Flanged Vacuum Ceramic Breaks


  • Designed and rated for high and ultra-high vacuum applications
  • Constructed of vacuum-grade materials, including high-purity alumina ceramic insulation, 304 stainless steel or low-expansion Kovar weldable lips, and vacuum grade braze alloys
  • CF flanged breaks feature one fixed and one rotatable flange (through-hole bolt holes)
  • Available in tube sizes ranging from 1/2" to 8" nominal diameters
  • Larger-diameter assemblies have tapered seals to minimize stress caused by differential expansion during thermal cycling
Contact Us
Contact Us
Questions? Let's Talk!
Contact your dedicated Lesker sales team today.
+1 800 245 1656
  • special case note
    The electrical and thermal ratings specified are of safe operating limits determined by various factors including material properties, mechanical design, and the intended operating environment. All electrical ratings are based on operation with one side in dry atmosphere and the other side in vacuum of less than 1 x 10-4 Torr. All VacuCAD files as well as any dimensions shown or listed in our ordering tables do not include manufacturing tolerances and are provided for reference only.

Ordering Table

(Click column headers to sort data)

Got VacuCADSM?
VacuCAD is a free library containing thousands of 2D CAD drawings (in DXF format) and 3D Models (in STP format) for many of our standard vacuum components and chambers. Please Log in
Feedthrough Selection Guide
Feedthrough Selection Guide
Finding the right feedthrough has never been easier with our step by step Feedthrough Selection Guide. You can narrow down our feedthrough offering by simply choosing from a variety of different options suitable to your requirements. If you can't find the feedthrough you need or want a custom configuration, please contact us by clicking here or call +1 800 245 1656 with your inquiry.
Contact Us - CF Flanged Vacuum Ceramic Breaks