... Filter Purge solution of carbon steel, steel alloy and stainless steel Alumina Ceramic Foam Filter DescriptionPorosity 80%~90%, low ... based on the equipment's diffierent material ,there are: Alumina foam filter, Silicon carbide foam filter, Zirconia foam filter. ... ring, Raschig ring, Conjugate ring, Catalyst bed support inert alumina ceramic ball, VSP etc. material available with ceramic, plastic, ...