... : ductile cast iron 3. copper rod, copper ring fire fighting equipment.landing valve, fire hydrant,fire hydrant valve1. Products Name:Sprinkler2. wide specifications:Pendant Sprinkler ... pressure reducing&stablizing type: SNZW65-I, DN655.double-valve and double-outlet type: SNSS65, DN656.double-valve and double-outlet pressure pressure reducing&stablizing type: SNSSW65 ...