... Detailed Product Description The tri-Y shape packing is a kind of new packing models. On the base of the casade ring, ... suppermini ring intalox, complexly attending to the shape, appearance and structure, it is renewed by keeping advance from disadvance, ... plastic, metals, it is a brand-new packing. The patent is recevied in 1998. The products features are the structure is special, high capacity, ...