Cast Iron Gate Valve 1) body:GGG45/50 2) stem/spindle:AISI420 3) ... ,AS,AWWA 4)1.0/1.6Mpa Cast Iron Gate ValveCast Iron Gate Valve is widely used in water,sewage,fire-fighting ... ,BS,EN,AS/NZ,ANSI,AWWA4) NRS Gate Valve: used in water,sewage plant system ; RS Gate Valve: used in fire-fighting systems ...