Description: Accumulator unit for BOP stacks is a very important equipment which controls BOP stacks and gate valves controlled by hydraulic pressure especially in drilling and workover operations. It is necessary to accurately operate and maintain the hydraulic control system. It consists of remote control system, drillers panel, air cable (except electrical type), pipe rack (electrical warming system available for cold area), high pressure manifold, protection room, etc. Accumulator unit is designed, manufactured and inspected in accordance with API Spec. 16D and it can be divided into two types: Electrical type FKDQ series and Pneumatic type FKQ series.