... mould 2.describe:union ball valve 3.type:single,double,thread,butterfly,brass ball 4.material: ppr, pvc, ... and clear communications.2. We can provide various of single/double Union valves, check valves, membrane valves, bottom valves, ... , JIS, socket, thread, order, quality, size, color, package, weigh, fast, long, excellent, chemical, pressure, traditional, easy clean, single , double, vertial, ...