Abstract: An apparatus for routing and controlling pressure of hydraulic fluid to and from hydraulic actuator cylinders of oil and gas well blow-out preventers (BOP's), has rotary hydraulic flow control valve/actuator assemblies which use a pair of integral double-acting pneumatic actuator cylinders to drive a rack gear coupled to a spur gear located inside an actuator housing fixed to a valve rotor shaft that protrudes from the valve housing through an outer wall of the housing, and has a manually operable handle attached thereto, thus enabling multiple valve/actuator assemblies to be mounted side-by-side to an hydraulic manifold. The apparatus includes an adjustable pressure regulator which inputs hydraulic fluid at full and regulated pressure to the manifold, and a bypass valve which selectably inputs hydraulic fluid at full or regulated pressure to the flow control valves.

Abstract: A modular apparatus for controlling flow of pressurized hydraulic fluid to and from opening and closing hydraulic actuator cylinders of oil and gas well blow-out preventers (BOP's), utilizes novel rotary hydraulic valve/actuator assemblies, each of which uses a pair of integral double-acting pneumatic actuator cylinders that drive a rack gear coupled to a spur gear located inside the actuator housing which is fixed to a valve rotor shaft that protrudes forward from the valve housing and protrudes through an outer wall of the housing and has a manually operable handle attached thereto, thus enabling multiple valve/actuator assemblies to be mounted in a close side-by-side arrangement to an hydraulic manifold. An air control manifold panel for remotely energizing the pneumatic actuator cylinders includes opening and closing push button control valves on an air manifold connected through air hoses to the actuator cylinders.