China Butterfly Valves manufacturers Description Our common wafer butterfly valves all have four bolt holes. When installing this type of butterfly valve, you only need to use long bolts to connect the flange holes on the pipe with the bolt holes of the wafer butterfly valve. The installation and removal are very convenient, but the stability ratio is poor. The Full Lug Wafer Lug Butterfly Valve has two connection methods, because it has a through pressure hole and a threaded pressure hole. The through-type pressure hole is similar to the wafer-type butterfly valve, and the installation method is the same, but the stability is better than the clip type. The installation method of threaded hole type pressure hole is different from that of wafer type and flange type butterfly valves. Each pressure hole has a thread. The Full Lug Wafer Lug Butterfly Valve is similar to the three-piece ball valve because you can remove one end of the pipeline without affecting the other side. And you can do this by using threaded inserts, flanges, and two sets of lugs (bolts) without nuts because each flange has its bolts. Cast steel, alloy steel, stainless steel, and other materials can provide greater valve body strength and make it more durable. The smaller torque allows you to control it more easily. In addition, the two-way sealing design is safer. Materials Body : Ductile Iron (GGG40, GGG50). Cast Iron (GG25), Stainless Steel Disc : Stainless Steel. Nickel Plated, Ductile Iron, Ductile Iron Coated Plastic, Titanium Steel, Copper Alloy etc Seat : Ethylene-Propylene-Diene Monomer (EPDM), Polytetrafluoroethylene (PTFE), Nitrile Rubber (NBR), Chloroprene, Chlorosulfonated Polyethylene (Hypalon), Silicon, Fluoroelastomer (VITON) , Caoutchouc etc. Stem : Stainless Steel. Carbon Steel ,2Cr13 About us We hope to become a leading Full Lug Wafer Lug Butterfly Valve manufacturer that is respected by society, trusted by our customers and partners, proud of our employees, and with outstanding core competitiveness. Our quality inspection department will inspect and test each processing step to ensure that the product is of high quality and meets production requirements. Due to the stability of our products, timely supply, and our sincere service, we are able to sell our products not only over the domestic market but also exported to countries and regions.聽China Butterfly Valves manufacturers website:http://www.zhonghe-valves.com/butterfly-valves/