Valve Characteristics The use characteristics of the valve determine its main performance and use range. The use characteristics of the valve include: valve category (closed-circuit valve, regulating valve, safety valve, etc.), product type (gate valve, globe valve, butterfly valve, ball valve, etc.), valve main parts (valve body, valve cover, valve stem, valve disc, sealing surface) material, valve rotation method, etc. The structural characteristics of the valve determine the installation, repair, maintenance and other methods of the valve. The structural characteristics include: the structural length and overall height of the valve, the connection form with the pipeline (flange connection, threaded connection, clamp connection, external thread connection, welding end connection, etc.), the…