Flush the pipeline before installing the valve. Debris allowed to remain in the pipeline (such as weld spatters, welding rods, bricks, tools, etc.) can damage the valve. After installation, cycle the valve a minimum of three times and re-torque bolts as required.FBv supply :
gate valve,cast steel
gate valve,
ball valve,api valve.FBV website:
www.valvesupplier.net/forged-steel-gate-valves.htm