... single ram BOP Manual Double ram BOP Hydraulic single ram BOP Hydraulic double ram BOP Brief Introduction to RAM Blowout Preventer: The RAM blowout ... can provide are hydraulic dual-RAM BOP, hydraulic single-RAM BOP, manual dual-RAM BOP, manual single-RAM BOP, etc.Structural Features: ... to replace the semi-annular rubber sealing ring and RAM compact, the others can be interchanged;Technical parameters 1 ...