... Oil Company PETROBRAS, developed the MAC M a f o l d concept The design compnses a conventional production manifold contamng manually operated valves and a retrievable control system that actuates these valves under the command of the host platform By separating the actuators from the valves...

... SUT 1997 Electronics pods Simple underwater housings whch contain Opto isolating circuits 24volt battery Timer circuits Solenoid valve dnver circuit boards Valve actuators The hydraulic part of the system is very simple and consists of Accumulators Two accumulators are used to provlde hydraulic power...