My Dream Cast iron gate valve with internal thread copper rod soft seal, fire water pipe thread elastic seat seal gate valve

Cast iron gate valve is a type of valve that has the characteristics of low flow resistance, high height, and long opening and closing time. The disadvantage is that it is not easy to maintain. There are two types of cast iron gate valves: wedge gate valve and parallel gate valve. Click to go to Baidu Baike. Copper rods are generally produced using electrolytic copper, with a lower resistivity than low oxygen copper rods. Therefore, in the production of products with strict resistance requirements, oxygen free copper rods are more economical;
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