... "-24" 2.Pressure:Class150-600 3.Operation:Worm Gear,Electric,Pneumatic Carbon Steel Worm Gear Orbit Rising Stem Ball Valve1.Size:2 ... "-24"2.Pressure:Class150-6003.Operator:Worm Gear,Electric,Pneumatic4.Design and Manufacture: API 6D/608 5 ... , lignt industry, power station, gas and so on. Carbon Steel Worm Gear Orbit Rising Stem Ball Valve