[ Flap valves of metal for drainage pipes; ] manually operated metal valves; [ water-pipe valves of metal; valves of metal, other than parts of machines; ] check valves of metal other than parts of machines [ ; metal valves for controlling the flow of fluids in pipelines; metal pulleys, springs and valves not including machine elements; metal valves for controlling the flow of gases in pipelines; valves of metal other than parts of machines including those from alloy steel and titanium ]