... blowout preventer: double ram blowout preventer type:2FZ1835, 2FZ1870,2FZ2835,2FZ 2870, 2FZ3535, ZFZ3570 and 2FZ5414 ram blowout preventer: double ram ... blowout preventertype:2FZ1835, 2FZ1870,2FZ2835,2FZ 2870, 2FZ3535, ZFZ3570 and 2FZ5414. Technical parameter1)bore size: 7 ...