Profile: Jiangxi TaiDaChangLin Machinery Co., Ltd. specializes in producing steel & PE pipeline hot tapping machine, line stopping machine, sandwitch valve and other fittings for piping & pipeline systems. We are an ISO 9001 certified company. Sandwitch valves are easy to use and match the tapping & line stopping machine very well. These valves are widely used in gas, oil and water system. It is specially designed to be used with our hot tapping and line stopping machine, with the functions of connecting & sealing the piping system and machine. Line stopping machines are used to isolate piping system for repair, alteration, relocation or additions without any shutdown or interruption. Split tees are available in various materials and specifications. Split tee is an extruded style pipe fitting that is furnished with a flange.