When you need beryllium windows mounted to Conflat-style flanges for your UHV experiment quickly, look no further than Brush Wellman - Electrofusion Products, a trusted source for beryllium and beryllium processing since 1972. These windows can be baked to 450ºC and are helium mass spectrometer leak tight to 1x10^-9 atm-cm³/sec.

 

Why not choose both? We have an on-hand supply of standard size Conflat flanges with the largest possible aperture size, which means less time between when you order and when you receive your beryllium window assembly. All you need to do is choose between IF-1^®, PF-60^®, or PS-200^® grade beryllium foil and choose the required thickness. The table lists the aperture size and the thinnest possible foil to withstand 1 atmosphere of differential pressure with a safety factor. If you don’t need to have the thinnest foil possible, choose a thicker foil which will lower the cost and increase the amount of differential pressure the window can withstand. Of course, if you need a custom aperture (round, square, or any other shape or size), our engineers stand ready to meet your needs.

 

Other companies may offer brazed beryllium windows, but BW-Electrofusion specializes in diffusion bonding. Typical high temperature liquidus brazing induces structurally weakening grain growth in the beryllium window material. Since diffusion bonding is accomplished at temperatures below the melting point of the braze alloy, it results in high temperature performance without compromising the strength of the beryllium. By controlling the pressure in the process, diffusion bonding also offers control over braze alloy flow, meaning no high absorption alloy material in the active area of the window. In other words, a beryllium window perfect for your application. Want more details? Click here.

 

These made-to-order assemblies are available within 4 weeks of your order. As with everything BW-Electrofusion sells, we offer a lifetime warranty on our products against any defects in materials or workmanship (normal wear and tear or corrosion from operational use is excluded from this warranty). Click here to request a quote.

 

We have some of these assemblies already manufactured and ready for immediate shipment. Please check our inventory of ready to ship Conflat flange assemblies.

 

 

(Order by specifying Part Number, Foil Grade, and Foil Thickness)