JB / T8691-1998 wafer type knife gate valve JB / T8692-1998 flue butterfly JB / T8937-2010 Wafer Check Valve JB / T9093-1999 steam traps technical conditions JB / T9094-1999 LPG equipment emergency shut-off valves for the connection method according to (1) Threaded valve: with internal or external threads Shanghai and Shanghai Valve Manufacturing Co., Ltd., and pipe thread connecting .. (2) Flanged valves: a valve body having Flange Shanghai Guanlong valve Machinery Co., Ltd., is connected to the pipe flange. (3) welding connection valve: Body with welding groove connected to pipe welding. (4) clamp connection valve: Body with jaws, pipe clamp connection. (5) connected to the valve sleeve: the pipes are connected to the ferrule. (6) of the clip connection valve: bolts directly to the valve and two pipes connected together in the form of wear clip. Shanghai and Shanghai Valve Manufacturing Co., Ltd., Huizhou valve, the valve provided by the Dongguan Ming Kong, the Hong Kong Science and Technology Co., Ltd. valve. Valve Co., Ltd., Dongguan Ming Kong (www.gdmgfm.com) strong, credible, butterfly and other industries in Dongguan, Guangdong has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead valve and you work out of Hong Kong into the brilliant, for a better future!