... Steel Welding Gate Valve 1.Size: NPS2"-24",DN50-600mm 2.Pressure: Class150-2500LB,PN6-253.Material: Cast Iron,Carbon steel ... valves,ball valves,butterfly valves,diaphragm valves,mud valve ect.And it has complete inspection equipment, ... Double-disc.4.Sealing formation:Hard alloy,Alloy steel.Feature:1.Both design and manufacture are carried ... of powder and slurry fluid Stainless Steel Welding Gate Valve