... Ball Valve 1.Design and Manufacture:GB12237 2.Face to face:MZQ 3.End Flange:JB 79.1--94 4.Inspection:GB13927 Dumping Ball ... ValveCOMPANY INTRODUCTION:Zhengmao Valve Co., Ltd is founded in 1992 ... Now, we can provide with Ball Valve, Gate Valve, Globe Valve, Check Valve, Butterfly Valve, Slurry Valve, Feed Valve, Stop Valve and so on.They are ...