... ",DN50-600mm 2.Pressure:150-2500LB,PN6-25 Stainless Steel Welding Gate Valve 1.Size: NPS2"-24",DN50-600mm 2.Pressure ... -253.Material: Cast Iron,Carbon steel,Stainless Steel4.Operation: Hand wheel, gear, square head.5.Standard: GB,DIN,JIS,ANSI,BS ... driving(Hand wheel driving omitted),Explosion electric driving.2.Connecting type: Flange,Interior whorl,Other whorl,Welding,Bear and insert welding.3.Design ...