1.Build-in Ball Valves ,full flow 2.OEM 3.suitable for water services,heating,etc. 4.Opening/ ... prevents teampering With the internals of the valve when in the line. The ball valve have a double seal ... 111st Canton fairMain Market 1.Europe 2.South America 3.North America 4.Southeast Asia 5.Middle East Countries ... , Greece, Sri Lanka,Syria,Tunisia,Mauritius,Algeria etc. Build-in Ball Valves full flow/1/2 ...