One of our most popular items is the frit or filter disc, a round sintered porous filter in SS316 or Ti. We even offer frits in HastC, Inconel, Ni or a few other materials. We do not offer parts and products made from Al or bronze.

The diameters we offer are from 0.032” to 5” in different thickness. Most common are 1/16” and 1/8”. Our standard tolerances are 0.002”.

Frits are not cut from porous rods or cut from larger sheets. Frits are manufactured as single piece from powder by pressing the powder into a form (the tool). The resulting part is called a green part, has the shape and size as needed, but is only pressed and not sintered. By sintering the green part we will receive the final sintered porous product.
As we obviously need some material to form a porous product it is physically not possible to have more free volume than metal in a porous part (pore volume larger than 50%). In fact, the best we can achieve with sintered porous products is about 25 to 30% to guarantee a stable product. Also large pores do not work with small diameters or thickness. If you need pores of 100 µm, you can not expect us to manufacture a frit with 1 mm thickness. There is more pore volume than material. And this is a Not Possible manufacturing.

Talking about pore sizes. We can manufacture parts with pore sizes from 0.2 µm to 100 µm. But… These are nominal sizes. This is only a filtration grade. What the filter will hold back to 99%. Sintered porous pores are not like drill holes, they are irregular shaped inside the frit. And the pore sizes are following a Gaussian distribution.

You need to know about pressure drop and behavior of fluids and gas inside a frit or a porous part in general. No problem; here are the formulas.