Brass ball valve 1, Size: inch 1/2 to 4 2, Surface: nickel, brass, ... according to EN12164 or EN12165, CW617, CW614 Seal: PTFE2, Size 1/2”, 3/4”, 1”, 1-1/4”, 1- ... a safe tool grip during the fastening of the valves.6.All internal and external valve surfaces mus tbe free from ... defects and surfaces must be smooth (good finishing).7. All valves must be 100% testing, and will be evaluated according ...