... "--4" 2),Material:WCB,304,316 flange pneumatic ball valve,pneumatic ball valve,stainless steel ball valve 1),Size:1/2"-------4"2),Material:WCB ... some corrosive liquid5),Temperature range:-20-3506),Connection:flange7),Operation:pneumatic(220V)flange pneumatic ball valve,pneumatic ball valve,stainless steel ball ...