(1) Metal valve: the valve chest and other parts made of metal material. Valves such as cast iron, cast steel valves, valve steel, copper alloy valves, aluminum valves, lead alloy valves, titanium valves, Monel valve.

(2) Non-metallic materials valve: the valve chest and other parts are made of non-metallic material. Such as plastic valves, ceramic valves, ceramic valves, glass and steel valves.

(3) Metal Body lined valves: Body shape for the metal, the internal contact with the media who are lining the main surface, such as rubber lined valves, plastic-lined valves, lined ceramic valve.