UHV Conflat Flanges

Conflat flanges were invented to overcome the problems associated with enclosing a UHV environment, i.e. a vacuum chamber. These UHV requirements being ones of simple design, cheap repeatable seals, low leak rate and the ability to withstand high temperatures (>450 °C) without leaking.

UHV flanges is world renowned both for its quality and range of sizes and materials. The complete range of flanges are fully compatible with the internationally agreed ISO/Pneurop standards and will connect to any other flange that also complies with this standard (for flanges with a diameter greater than 300 mm no such standards exist at present). All flange OD dimensions are nominal.

The UHV seal is made by trapping a copper gasket between two sexless flanges that have a sharp knife-edge profiled onto their operating face.

To aid the construction of UHV chambers and components, flanges are available in both fixed and rotatable configurations. Fixed flanges are a single machined item with the bolt hole orientation fixed into position once they are welded onto a chamber or component. Rotatable flanges are manufactured in two parts with the knife-edge part and external bolt hole ring being separate. Once the knife-edge part is welded in position it is easy to change the orientation of the bolt holes relative to the axis of the port. This makes rotatable flanges ideal for the situations where>

Please Note: It is not advisable to have two rotatable flanges at the same joint.