The movement path of the metal sealing valve has the characteristics of both gate valve (multi-turn) and sanitary ball valve (90-degree turn), so its performance has the advantages of both gate valve and ball valve. The structures of the metal sealing valves and sanitary ball valves have similarities and differences, as is discussed below. Similarities: 1. Both of the metal sealing valve and sanitary ball valve can achieve metal sealing and endure high temperature. 2. They share the same way of operation. They can be operated by hand wheel or bevel gear box. 3. They share the same way of valve stem action. Lift first to make the valve flap…