... single ram BOP Manual Double ram BOP Hydraulic single ram BOP Hydraulic double ram BOP Brief Introduction to RAM Blowout Preventer: The RAM ... provide are hydraulic dual-RAM BOP, hydraulic single-RAM BOP, manual dual-RAM BOP, manual single-RAM BOP, etc.Structural Features ... connection adopts flanged, studded and clamped connection; 5. Specification of hydraulic control oil ports: 1"NPT, adapter adopts ...