... operating temperature petroleum chemical fire station and other conditions of-28-300℃Feature:Size: 1 1/2’’ —24’’ DN40—DN600Material: WCB, CF3 ... , WC6, WC9Ball: CF8, CF8M, WC6, WC9Pressure rating: class 150—class 300 PN16—PN40Seat: F6a, F304, F316, F11, F22Drive mode: handle, electric ...