... /4',1',11/4',11/2',2',21/2,3',4'2,Certificate: ISO9001 , CE 3,material: brass body , brass ball, steel handle 4)Temperature: -30<t ... -causticity liquid , saturated steam .COMPONENT:NO.ComponentMaterial1BodyC377002BonnetC377003BallC377004Seat RingTeflon5StemC377006Packing RingsTeflon7WasherC377008HandleSteel & Aluminium9NutSteel Quality and inspection:Fegular checking on line from production in each ...