... of valve.Our products include globe valves,check valves,safety valves,ball valves,butterfly valves,diaphragm valves,mud valve ect.And it ... Specification:1.Pipeline valve: API6D,API6002.Steel flat gate valve for pipeline: JB/t52983.Pipe flange and ... 2 that of the common valves only,able to lightly open and close valves.3.The seat ring ... suitable for the requirement of 24hour duty. API Casting Gate Valve