Blow-out preventer(BOP) 1. Shear Ram Type BOP 7 1/16" - ... : Shafer and cameron 3. According to :API Spec 16A Blow-out preventer(BOP) The BOP has a single gate and dual ... be designed according to user requirements), mainly from the shell, side door, cylinder, cylinder head, piston, piston rod, lock shaft, sealing ... : flange, studden Working pressure: 2000~20000psi DN: 90~346 Blow-out preventer(BOP)