Subsea Valve Actuators with Safety Certificate
The new concept for Subsea Valve Actuators (SVA) from Bosch Rexroth has been certified by DNV GL for use in safety systems with requirements up to Safety Integrity Level (SIL) 3. The SVA is a self-sufficient actuator for opening and closing process valves in the deep sea up to 3000 meters and deeper. The system consists of an electrically controlled drive with a hydrostatic transmission. Compared to a conventional electromechanical axis, this drive saves up to 75 percent of the energy required.
The patented SVA opens and closes process valves in applications for oil and gas production or CO2 storage systems in the deep sea. A redundant design of e.g. safety valves and proven springs ensures that the actuator safely closes the process valve even in the event of a power failure and without external energy supply. In addition, the actuator can also be operated mechanically from outside, by an underwater robot and by means of an independent interface. All relevant components of the drive train are designed in duplicate. DNV GL, the world’s leading classification society for the maritime industry, has now certified the SVA for use in systems with safety requirements up to SIL 3 according to IEC 61508 and IEC 61511. In addition, the design complies with the ISO 13628-x and API 17x standards, which are important in the offshore industry for the protection of people and the environment as well as subsea installations or ships.
Source: Bosch Rexroth