Small Piece Gluing Line,Mini Gluing Line,Glue Line,Glue Line For Small Parts Pujiang Longhui Machinery Co., LTD. , https://www.longhuimachinery.comBuried Welded Ball Valves consist of an all-welded body and a carbon-reinforced Fluorosilicone gasket for long life operation with frequent handling, contaminants and chemicals. Grinding fine stainless steel ball can ensure years of open and close, reliable operation.