(1) metal material valves: valve body and other parts made of metallic material. Such as cast iron valves, cast steel valves, valve steel, copper alloy valve, aluminum valve, lead alloy valves, titanium valves, Monel valve. (2) non-metallic materials valves: valve body and other parts are made of non-metallic materials. Such as plastic valves, ceramic valves, ceramic valves, glass steel valves. The following is some stainless steel valve material parameters and specific application (1)...

Structural characteristics of the valve closure member in accordance with the direction of the valve seat can be divided into: (1) gate-shaped cross-section: close member along the seat centers; such as the cut-off valve (2) tap and ball: closure member is a plunger or ball, rotating around the center line itself; if plug, ball (3) gate shaped: the closure of parts moving along the vertical seat centers; such as gate valves, gates and other (4) swing shape: Close the valve seat member...

（1）小通径阀门：公称通径DN≤40mm的阀门。 （2）中通径阀门：公称通径DN为50～300mm的阀门。 （3）大通径阀门：公称阀门DN为350～1200mm的阀门。 （4）特大通径阀门：公称通径DN≥1400mm的阀门

(1) ultra-low temperature valve: for medium temperature t

（1）超低温阀：用于介质工作温度 t