I wonder where there is a flanged elbow ball valve in Wenzhou? I searched it online for you. There are several flanged ball valves in Botou, Hebei. I don't know if it is the kind you need. You can search in Baidu, then call the manufacturer and ask if there is an office in Wenzhou, or deliver the goods through logistics. You can also go to the manufacturer in person to find out the situation and decide which product to use. Look not only at the price, but also at the quality.