... standards and GB standard.Hot tags: Semi Ball Valve, China, mill, manufacturer, supplier, factory, wholesale, cheapU-type Discharging ValveP13 Charging ... : long life, self-lubricating seal ring made of PTFE, small size, light weight, easy installation and maintenance, it can be ... chemical fire station and other conditions of-28-300℃Feature:Size: 1 1/2’’ —24’’ DN40—DN600Material: WCB, CF3, CF3M ...